RECEIVERS
For possible further information you may wish to look at the early versions of BR222
TYPE
INFORMATION
DETAILS/IMAGES
Amplifier LB
Designed in 1917. Frequency Range 60 to 1000 kc/s. Fitted to receiver outfit LB in conjunction with Type 31 transmitter for gunnery control.
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Amplifier M3B
Designed in 1923. Frequency Range 30 to 1800 kc/s. Fitted to receiver outfit CI and MH.
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Amplifier M4
Designed in 1924. Frequency Range 1500 to 6000 kc/s. Fitted to receiver outfit CE and CG.
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Amplifier M5
Designed in 1926. Frequency Range 450 to 2000 kc/s. Fitted to receiver outfit CH, CI and CL.
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Amplifier M9
Designed in 1928. Frequency Range 60 to 670 kc/s. Fitted to receiver outfit CK, CL and D/F outfits SA, SD, SF and SGK.
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Amplifier M11
Designed in 1926. Frequency Range 12 to 550 kc/s. Fitted to receiver outfit CI and CJ.
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Amplifier M13
Designed in 1929. Frequency Range 12 to 60 kc/s. Fitted to receiver outfit SF.
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Amplifier M19
Designed in 1932. Frequency Range 15 to 550 kc/s. Fitted to receiver outfit CN and CM.
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Amplifier MBBox Model
For those of you who have not read the Pre WW1 Files from 1900 to 1913 you may perhaps not know how to work in 'LS' units as regularly mentioned in those files. It would be a pity were you to miss out these files for they are packed to the limit with interesting detail of the beginnings of the W/T Branch in the Royal Navy. However, if you look at the 1913 page and then scroll down to the 'Aerial Flown From Kites.pdf' section you will see the formula in a worked example - there are many other incidences of these worked examples from 1900 to 1913 files. The LS of a circuit is the tuned circuit represented by capacitance and inductance [L and C] and the resultant circuit is resonant to a specific frequency. The formula is wavelength in feet = 206 square root of LS so, when the text tells you that a range of waves is from 11LS to 50LS it means wavelength in feet = 206 x 3.317 {this is the square root of 11} = 683.3 feet x 12 [to bring it to inches] = 8199.62 " ÷ 39.3 [to bring it to metres] = 208.64 meters = FROM 1.437 MHz - repeat that for 50 LS = TO 670 kHz. Meters, remember, are converted to MHz or parts of a MegaHertz by dividing 300 [a derivation for the speed of light = velocity] by the number of meters e.g. 300 meters = 1 MHz, or 30 meters = 10 MHz, and 650 meters would be 0.461 MHz or 461 kHz etc. Look at th link to understand how it was done at around the time of the First World War
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Amplifier MBABox Model
I'll wager that there are few if any equipments which have been named the same since receivers and transmitters joined the Royal Navy. This file is the story of a WW1 W/T Receiver, but in the early 1950's, when the missile 'SEASLUG' was first commissioned into the County Class Destroyers, the controlling transmitter/receiver, apart from the 901 Radar, was an outfit called "MBA" which is shown on this site under the page heading of "MISCELLANEOUS". See the link under Scuttle MB for instructions on how to convert meters to frequency and the LS system.
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Amplifier MD
Designed in 1922. Frequency Range 60 to 500 kc/s. Fitted to receiver outfit MD and D/F outfits SA and SD.
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Battery Power
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Buzzer Test G21
Designed in 1926. Fitted into D/F Outfit SD Quote.....G21 is a buzzer tester for D/F and was introduced to meet the need for an instrument which could be made to influence each loop aerial to exactly the same extent. If the two loops are identical (as in shore D/F stations) and are equally energised the zero will be found to be at Green 45 degrees. In a ship where the fore and aft aerial is usually smaller than the beam aerial the zero will be found to be nearer the bow at about Green 30 degrees. Unquote.
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Detector
Covers all waves. Fitted into Receiver Outfits EE, CG and CI when fitted in Destroyers.
Photographs and Schematics
Detector E25XHeterodyne
Designed in 1930. Frequency Range 7500 to 23000 kc/s. A superhet receiver used for automatic high speed reception with amplifier M16.
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Detector E26XHeterodyne
Designed in 1930. Frequency Range 700 to 20000 kc/s. A superhet receiver fitted in D/F outfit SGX.
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D/F Training Units
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Goniometer S25
A sample of radio goniometers which were portable devices and could be used with several D/F outfits. See links to the right.
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Heterodyne Unit K5
Designed in 1922. Frequency Range 13.5 to 2500 kc/s. Low power heterodyne unit with one valve, a tuned grid and a coupled anode.
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Heterodyne Unit K7
Designed in 1931. Frequency Range 60 to 600 kc/s. Fitted to D/F outfits SG and SHX.
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Interference & Measurement
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Note Magnifier N9
Designed in 1924. Frequency Range 15 to 550 kc/s. Can be used with any amplifier for the production of earphone signals.
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Note Magnifier N19
Designed in 1932. Fitted in receiver outfits CM and CN.
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Note Magnifier N22
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Oscillator G31
Designed in 1928. Frequency Range 1500 to 25000 kc/s. Supplied for tuning receiver sets.
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Oscillator G33
Designed in 1934. Frequency Range 15 to 24000 kc/s. Supplied for tuning receiver sets.
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Oscillator G35
Oscillators (just like wavemeters, buzzers and heterodyne equipments) were very important tools for the management of W/T equipments both transmitting and receiving: see also Wavemeter Outfit GN. Oscillators had three basic roles. They could act as a local oscillator when setting a receiver to a desired frequency; measure the frequency of an in-coming radio transmission, or measure the frequency of a local out-going transmission. The link below show a picture and explains a little bit about the technicalities of a Naval Oscillator.
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Quench
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Receivers
List of Receivers
Receiver Valves
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RN Receiving Apparatus 1922
This rather tattered report was written in 1922 and looked back to the pre-WW1 years. It is produced here just as a matter of interest for those interested in the early circuitry of receivers just pre and post WW1. This file shows just the first few pages. The file is extremely technical and not suited for general reading
Report Extract
RN Receiving Apparatus 1939
Details
Receiver 62HOutfit CDV
Frequency Range 100 to 156 Mc/s crystal controlled. A standard V.H.F. Receiver Outfit fitted in ships and shore stations as a replacement for Receiver Outfit CDU. It is used in conjunctions with Type 87M/MS/P. When during WW2 the VHF AM Transmitter Type 87 was introduced it came with its own 87 receiver as an option. It wasn't a popular receiver and unlike its brother transmitter had many problems. It was relieved by the Receiver CDU/P104. However, not long afterwards, Their Lordships chose this Receiver, the 62H [which they called the CDV] to take the place of the CDU/P104. The choice was obviously good for it lasted out the useful life of the transmitter Type 87.
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Receiver 87 (Original Receiver)
Designed 1941. Freq Range 100 to 124 Mc/s. As a component of Type 87 in Cruisers and above. For R/T communications with fighter aircraft. May also be used for the reception of C.W. signals. RAF Power Supply Unit Type 3, requiring 190/250 volts 50 cycles single phase A.C. supply.
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Receiver P104Outfit CDU
Frequency Range 100 to 150 Mc/s crystal controlled. When during WW2 the VHF AM Transmitter Type 87 was introduced it came with its own 87 receiver as an option. It wasn't a popular receiver and unlike its brother transmitter had many problems.Their Lordships chose this Receiver, the P104 (which they called the CDU) to take the place of the 87 VHF Receiver and it worked well for some time. However, they put this receiver 'out to grass' and in its place brought in a third receiver, the CDV/62H, of which we will hear about later. Fitted where a VHF requirement was most relevant.
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Receiver 394 F/G
Frequency Range - E Version 150 to 3000 kc/s and F Version 150 to 4200 kc/s. The Marconi Receivers 394E and 394F were fitted in very small craft e.g., ML's, MTB's etc and in some minor W/T shore stations. They were fitted in association with the Marconi Transmitter TW12. So, for some of its information, have a look at the Transmitter Matrix to Transmitter TW12 scuttle. The link below tells one about the next size up {!} namely a few notes on the 'G' version {with a mention of the 'F' version} which is very similar to the versions already mentioned.
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Receiver 682/P40
Frequency Range - 89 to 95 MHz with Type 682 Tx 7AM AP 27944 and CDK Receiver P40 AP 7945A. 65 to 85 MHz with Type 682M Tx 7AM AP 53175 and CDQ Receiver P40 AP56187A. It is used on handcarts, vehicles, and other craft as the main or supplementary equipment. It may be installed with or without remote control and may be set up for SIMPLEX or DUPLEX working. It is crystal control and operates [TX and RX] on pre-determined spot frequencies. Power requirements are LT 12V @ 3 AMPS/HT 330V @200mA DC. The microphone and modulator require 4V @ 30-40mA DC. Power output was 7 - 10 Watts. A station set up to use Type 682 and outfit CDK or Type 682M and outfit CDQ, requires, in addition, one or more of the aerial outfits AGU, AGY, AGW, AGP or AGO, which are supplied separately, and one or more of the following outfits:- Control Outfit KSC - for simplex working only. Control Outfit KSD - for duplex working with NO LINKING outfit employed. Control Outfit KSF - for duplex working WITH a LINKING unit employed - this outfit is required where the AUDIO input and output are to be extended for other purposes e.g. connection with a field telephone exchange or relaying through another circuit. Aerial Switching Unit Outfit ESC - for simplex working only. In its time [1945] this set can either be thought of as 'simple' or 'very sophisticated', the latter having every conceivable device option fitted to the Type 682/Type 682M. The FACILITIES available were as follows:- Simplex - Available with either local or remote positions. In both instances HT switching of the transmitter is carried out by means of the pressel switch in the handset. Duplex - Operation is available with either local or remote positions. HT switching of the transmitter is or is not possible at the handset according to the outfit used. With duplex operation, the radio station can be connected to a field telephone exchange so that any extension of this exchange can speak over the radio link. Teleprinter - Teleprinter operations of a duplex link is possible. This requires a teleprinter, teleprinter terminal unit, teleprinter rectifier unit and an S + DX MkII in addition to the outfits described. Relay - Where 2 complete installations are fitted in close proximity to one another, as in Radio Van 29, the installation may be linked together so that what one station receives can be re-radiated on the other circuit and vice versa.
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Receiver AR88
Frequency Range 535 kc/s to 32 Mc/s. An HF/MF receiver outfit fitted in some Royal Navy Shore Wireless Stations
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Receiver B21
What has been written for the B21B the Receiver for the FH3, applies equally here for this receiver. You will note by comparing photographs [both of which appear below] that the bottom left control and the central bottom control on the 21B and much modified from this, the B21 version.
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Receiver B21B
Frequency Range 1 to 20 MHz. The receiver is designed for use with D/F outfit FH3.
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Receiver B34
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Receiver B46/B47Outfit CAI to CAP
Frequency Range B46 - 1.4 - 15 Mc/s continuous in three ranges.
B47 - 15 - 27 kc/s continuous in single range and 40 - 500 kc/s continuous in three ranges. The CAJ to CAP Series of receivers reflects the receivers associated with the Transmitter 612, when fitted separately as receiver only kits. Fitted mainly ashore in W/T stations.
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Receiver Outfit CAS
Capable of CW, MCW and Voice reception. Frequency Range 59 to 555 kHz and 1.47 to 30 MHz in five bands. An HF/MF receiver associated with the low power transmitter 618, together fitted as the emergency HF transmitter in frigates or above, and as the main receiver in small vessels. Fitted widely throughout the Fleet..
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Receiver Outfit CAT
Designed in 1952. Frequency Range 60 kc/s to 32 Mc/s. An HF/MF receiver associated with the low power transmitter 619, together fitted as the emergency HF transmitter in frigates or above, and as the main receiver in small vessels. Fitted widely throughout the Fleet.
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Receiver Outfit CAU
Army Receiver R209. Frequency Range 1 to 20 MHz in four bands. Of 1953 vintage to the Royal Navy and 1946 to the Army. Link to the right provides a little bit of information with a photograph supported by a good line drawing of the front panel and its controls./td>
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Receiver Outfit CFA
Frequency Range 14 to 22. kHz. This was a VLF receiver fitted into submarines. Fitted widely throughout the Submarine Fleet.
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Receiver Outfit CGG
Army Receiver R201. Frequency Range 1.5 to 22 MHz. An HF receiver outfit fitted ashore in W/T stations. Capable of CW and R/T, Triple Diversity
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Receiver CRD 150Outfit CGE
Could it be a B28 or a B35? It comes from the same stable, namely from the Marconi Company. This is known as a CR 150 {B28/B35 were variants of the CR 100 series} and whilst it was used in an Admiralty system for W/T Shore Station fit as the Receiving Outfit CGE, it was never used as a stand alone general communications receiver. For that reason it did not receiver an Admiralty name. The frequency range of the CR150 was between 2 and 60 Mc/s {yes, 60 Mc/s} and they called this a "High Frequency Band Receiver" rather than a H/F Receiver. It was a double superhet. As a system fit the diversity was achieved as shown in this diagram.
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Receiver Outfit CGH2 x B40
Frequency Range .65 to 30.6 MHz. An MF/HF receiver outfit fitted ashore in W/T stations. Capable of CW and R/T, Triple Diversity.
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Receiver Outfit CGK
Outfit CGK is part of a suite of receivers fitted in Shore W/T Stations for frequency diversity.
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Receiver Outfit CGN2 AR88LF Receivers
Frequency Range 73 kHz to 30.5 MHz when fitted with AR88LF receiver. Part of a suite of receivers dealing with diversity and fitted into some of the RN W/T Shore Stations.
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Receiver Outfits CGP/CGR
Shore fitted dual diversity receivers. Click on the link below and scroll to Section 2 where you will see reference to the CGP and CGR (plus other receivers already covered in the matrix)
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Receiver Outfit CGR
Frequency Range 1 to 30 MHz. A dual space diversity receiver for automatic morse or teleprinter working.
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Receiver H23Outfit CGL
Frequency Range 3 to 27.5 MHz. Shore fitted. Triple diversity receivers.
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Receiver Outfit CHD
Fitted on shore bases. Used to measure accurately the characteristics of a transmitted radio signal.
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Receiver Outfit CJA
The main HF Fleet receiver from the early 1960's and fitted in all ICS1 [STANDARD 3A] ships/submarines and also in ICS 1 Mixed Fit [STANDARD 3B] ships. After the introduction of the FTA, is could receive all frequencies from VLF to HF. See also 'COMIST/ICS' in the TRANSMITTER section matrix.
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Receiver Outfit CJD
The main LF/MF Fleet receiver from the early 1960's and fitted in all ICS1 [STANDARD 3A] ships/submarines and also in ICS 2 ships [STANDARD 3C]. It was also fitted into Mixed Fits and thus into STANDARD 3B and 3D ships. See also 'COMIST/ICS' in the TRANSMITTER section matrix.
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Receiver Outfit CJK
Designed Late 1950s. The main HF/MF receiver in the Fleet during the pre and actual COMIST period dating from the late 1950's until the mid 1960's. It was synthesised and thus very stable, but compared with the receivers which replaced it, it was a complicated set up having many inter-related parts. Fitted widely throughout the Fleet. See also 'COMIST/ICS' in the TRANSMITTER section matrix.
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Receiver Outfit CJM
The main HF Fleet receiver from the mid 1960's and fitted in all ICS 2 ships [STANDARD 3C]. It was also fitted into Mixed Fits and thus into STANDARD 3D ships. After the introduction of the FTA is became the main Fleet receiver capable of receiving all frequencies. See also 'COMIST/ICS' in the TRANSMITTER section matrix.
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Receiver Outfit CJP
Part of the emergency transmit/receive outfit 643, although it can be fitted as a stand-alone receiver. Fitted widely throughout the Fleet.
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Receiver Outfit CN
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Receiver P116Outfit CUH
Frequency Range 277 to 283 MHz crystal controlled - ten switched frequencies. A medium sized pre-channelled UHF receiver associated with the transmitter 691. It was fitted either as the only UHF equipment or additional UHF equipment to the CUJ receiver. Fitted widely throughout the Fleet.
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Receiver Outfit CUJ/CUL
Designed in the 1950s. The main Fleet UHF receiver in the 1950s, 60's and 70's - associated with the transmitters 692 and 693. Fitted widely throughout the Fleet.
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Receiver DST100
Frequency Range 50 kHz to 30 MHz. An MF/HF receiver outfit fitted ashore in W/T stations. CW and R/T, High degree of intelligibility to the reception of weak signals.
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Receiver HR71
Receiver Outfit CHA
Part of the W/T Shore Station suite of receivers, this one dealing with Remote Controlled facilities. Rather than show you yet another receiver or control panel, here we simply show a concept where the RECEIVER is in the W/T Shore station, and the OPERATOR is some distance away in a COMMCEN [Communications Centre]. In the basic block which follows, the W/T Station and its receiver [HR71] is in the right side block being fed by an aerial, and the operator, in the left side block, sits controlling his [HR72]. Note the PO LINES [Post Office Line] in the middle of the two blocks. The top line is sending from the operator to the receiver [left to right] and the bottom line, from receiver to operator [right to left]: they are both transferring AF [audio frequencies] in the range 200 to 3100 cycles [c/s]. On the receiver side, note that the aerial connection route is via a ganged switch which is drawn 'connected', so the signal flow is RF across that switch to the receiver for de-modulation, then AF out of the receiver on the adjacent parallel line to the LP Filter [on the bottom] via the ganged switch to the output transformer. AF OUT to the transformer is either via the LP [Low Pass] Filter or the Frequency Shift Oscillator, the latter being using for a 10 kc/s calibrator oscillator. The AF arrives at the operators headphones via the top LP Filter. When the operator needs to change the parameters on the distant receiver, he operates the required spot frequency signal choice, the modulators, the operate button which in turn creates a magslip voltage and a discriminator voltage which alter the receivers setting.
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Receiver RA9Receiver Outfit CHE
Frequency Range any two channels between 2.5 and 20 Mc/s in three ranges. Used as a long range air to ground voice link receiver.
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Receiver RA 17LReciver Outfit CGS
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Receiver RA17 & RA17LReceiver Outfit CHB/CHC
Frequency Range 980 kHz to 30 MHz. Fitted in shore stations and in some Fleet units chiefly diesel submarines.
Series DetailsCHC Details
Receiver RA17LReceiver Outfit CGT/CHJ/CHK
Highly stable receivers replacing the CHC/CHB series in RN W/T shore stations.
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Receiver P33
Frequency Range 150 to 550 MHz. A very small receiver ! It is a five autodyne consisting of a 'frequency changer', a two-stage IF amplification, a detector and the AF amplifier. Autodyne simply means that an Autodyne oscillator, in a receiving device, generates the local oscillations required for beat reception [BFO] in addition to performing its other functions, such as amplification and/or detection; a clever valve/circuit for those days. Its use [covered by a Confidential Book which we do not have] and its frequency range of 150 to 550 Mc/s, suggests that it belonged to the RCM Department [Radio Counter Measures - the EW of today] and because of its tiny size, in a covert rather than an overt role !
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Receiver P38
This handbook was primarily written to cover Receiver P38 (Patt. W7963). Receiver P48 (Patt. 54491) is identical with P38 except for the following:- Condenser 2 - 8 micromicrofarads (C1) in P38 is replaced in Receiver P48 by a 5 - 55 micromicrofarad condenser controlled by a knowb (K1) on the front panel (see fig below) and the 5 micromicrofarad ceramic condenser (C124) connected in parallel with C1 is omitted in Receiver P48.
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Receiver P42VHF Type 2 Naval
The receiver is designed for mobile or headquarters operation on telephony, modulated or intrrupted C.W. at a fixed frequency in any one of 14 groups.
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Receiver D/F SA
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Receiver D/F SD
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Receiver Outfit SEARemote Control
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Receiver D/F SF
Designed in 1938. Frequency Range 60 to 670 kc/s for D/F reception and 15 to 170 kc/s other reception. Fitted with vertical frame coil for D/F and a vertical loop aerial or horizontal frame coil for non-D/F reception. This was a SUBMARINE D/F Set and was fitted in 'O' Class boats.
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Receiver D/F SGX
Designed in 1930. Frequency Range 60 kc/s and above. Fitted aloft in the highest part of the ship above all other aerials and metal work.
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Receiver SX28
Frequency Range 550 KHz to 43 MHz. An MF/HF commercial receiver fitted into some of th RN's shore W/T stations. CW and R/T.
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Receiver Q2X
Designed in 1930. Frequency Range 5000 to 75000 kc/s. Fitted in Type 75X (in heavy ships) and as a VHF quench receiver.
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Receiver Q4Quench Unit P2
Designed in 1926. Frequency Range 18500 to 29000 kc/s. Fitted in Type 71 (in heavy ships) with receiver outfit QB.
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Receiver Q7
Designed in 1928. Frequency Range 17500 to 30000 kc/s. Fitted in Type 71, 47, 48Y and 46X (in heavy ships) with receiver outfit QC.
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Receiver Outfit QBX
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Receiver QD
Frequency Range 38 to 59 Mc/s. This was an off-the-shelf procurement from the very famous Hallicrafters stable. Like all receivers in the 'Q' Series, this one was an intercept receiver generally used as a RCM [Radio Counter Measures] device rather than a general purpose receiver in the high frequency range.
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Receiver QP
A receiver of vintage 1946 which was involved in RCM - EW Speak for Radio Counter Measures. For those of you au fait with the mounting of the aerials for the QR and QS receivers [on an angle of 45 degrees] to receive both horizontally and vertically polarised signals, the QP aerial fit [shown in this file] is identical. The file contains a picture of the main receiver forming this outfit.
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Receiver QR
Frequency Range 10 to 165 MHz. A VHF AM and FM receiver usually sited in the WEO. Fitted widely throughout the fleet.
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Receiver QS
Frequency Range 19 to 165 MHz. A VHF AM and FM receiver usually sited in the EWO. Fitted widely throughout the fleet.
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Receiver TCS
Capable of CW, MCW and Voice. Frequency Range 1.5 to 12 Mc/s in three ranges. A receiver which was an integral part of the TCS system. To best show this WW2 American addition to our W/T suite, we have produced a PDF file which shows the whole system, including a close-up of the RECEIVER. The file is also shown on the TRANSMITTER matrix also. The receiver turned out to be a problem, and a very real problem too. Superhet receivers have a local oscillator which mixes with the RF stage to produce an IF stage[ Intermediate Frequency], the very essence of heterodyning. Unfortunately for us [all and any communicators using this receiver] the LO was a pretty powerful oscillator which not only oscillated as part of the heterodyne system, but also oscillated direct to the aerial. The original system worked in simplex mode i.e., it had a send/receive relay controlling the use of one aerial. When not transmitting for real [an intentional event] the relay biased itself to the reception side connecting the aerial to the receiver and its RF stages. Whilst in this position, it transmitted the output of the LO [rather like a TV receiver does which the proverbial TV Licence Monitor Van can so easily read/intercept and thus pinpoint] and unwittingly broke the rules of RADIO SILENCE. The LO could be D/F'ed even though every Morse key and Pressel switch in the ship was isolated [by order]! It soon became obvious that either a modification had to be performed on the front end of the receiver or that the receiver had to be disabled. The Royal Navy chose the disabling and quite often removed the TCS receiver from the system fit. There was a precedent ! If you look through the scuttle called TUNER AMPLIFIER B9 {written in 1928} you will see why a receiver, without a 'harnessed radiation', couldn't be issued to the Fleet for use where there were many ships together in formation. Once a D/F fix had been made on the hapless radiating ship, all ships in company would have been targeted as one group. Fitted widely throughout the Fleet which included submarines. Click here TCS.pdf for a description, and here FULL TCS SYSTEM.pdf for system. In the links below you will see a good picture of the receiver and its connections in the system.
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Receiver B28 CDC/CDL
The B28 was for many years, throughout WW2 and afterwards, the main Fleet MF/HF Receiver. Outwardly, its switches and controls were simple and uncluttered when compared with the B29, and it was a superhet receiver, as opposed to the TRF (Tuned Radio Frequency) of the B29. In most cases, a ship would have several B28's fitted to just the odd B29. Note the three out of four names this receiver was called throughout the years. In the first of three pictures there is a reference to the "CR100", the manufacturers name and also to "Tuner-Amplifier B28" its name when first entering service with the Navy: the Type 65 is fully covered in the Transmitter Matrix. The second picture refers to it as being a "CDC" which is its official sea-going name whilst the third picture simply repeats its original Naval title. Its fourth title was "CDL" which it assumed when fitted ashore in Naval W/T Stations.
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Receiver B29 CDF/CDM
Frequency Range 15 to 550 kc/s. Fitted widely throughout the Fleet. The B29 was for many years, throughout WW2 and afterwards, the main Fleet LF/MF Receiver. Outwardly, it was much more complicated to look at than was the B28, and it was a 'straight' receiver, a TRF (Tuned Radio Frequency) set, unlike the B28 which was a superhet. In most cases, a ship would have several B28's fitted to just the odd B29.
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Receiver FAZAdaptor Outfit
A device which adds an SSB facility to a receiver not designed to receive such signals. It is associated with the receivers CDW and CDY, which, with the FAZ added, were used mainly as general purposes receivers in the monitoring of SSB Voice and F1 RATT signals for engineering purposes. Fitted widely throughout the Fleet. Generally speaking, the B40D catered for SSB voice and F1 RATT at a wide shift of 850Hz whereas the B41C was used only for F1 RATT at a narrow shift of 85Hz or 50Hz.
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Receiver FTAUp-Converter
An up-converter built into the receiver aerial input system. Receives from 7kHz to 2.2MHz and mixes this range with a 5MHz source coming from the Frequency Standard FSA. The resultant highly accurate result of 5007kHz to 7200kHz is then fed to a standard HF receiver [switched to the FTA line] tuned as required, so that if, say, 16kHz was needed, the HF receiver would be tuned to 5016.0kHz. See also COMIST/ICS on the TRANSMITTER matrix.
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Receiver HRO
Frequency Range 50 kHz to 530 kHz and 480 to 30 MHz. An MF/HF commercial receiver fitted into some of th RN's shore W/T stations. CW and R/T.
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RFA Commcercial Receivers
The link on the right provides details for some of the receivers many of which, at one time or another, were fitted into our RFAs. Look paricularly at the following: ALERT, ATLANTA, ELECRA, LODESTONE, MERCURY, SEAGUARD, VIGILANT.
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Sense Finder S41
Designed in 1923. Fitted with D/F outfit SD. Formerly called the Eliminator Reciprocal Bearing.
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W/T Rx Handbook - Tuners
W/T Handbook - Tuners
Tuner A4
Designed 1924. Frequency Range 1500 to 6000 kc/s. Fitted with receiver outfits CE and CG
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Tuner A5
Designed 1926. Frequency Range 450 to 2000 kc/s. Fitted with receiver outfits CH, CI and CL.
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Tuner A7
Designed 1928. Frequency Range 60 to 170 kc/s. Fitted with D/F Outfit SF. A7 is a very simple tuner fitted in conjunction with amplifier M9 for use with a horizontal frame aerial. As can be seen from the equivalent diagram, the tuner merely places an LC circuit in series with the frame coil. A separate heterodyne is always to be used for CW reception.
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Tuner A8
Designed 1929. Frequency Range 15 to 60 kc/s. Fitted with D/F Outfit SF. Tuner A8 is fitted in conjunction with amplifierM13 for use with a vertical loop aerial. It must be remembered that when employing this model, better reception will be obtained when the loop is pointed approximately in the direction of the transmitting station. Good signals will, in fact, only be obtained if the transmitting station is on or before the receiving vessel's bow, or on or abaft her quarter.
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Tuner A9
Designed 1928. Frequency Range 60 to 70 kc/s. Fitted with outfit CK.
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Tuner A11
Designed 1927. Frequency Range 12 to 550 kc/s. Fitted with outfit CI and CJ.
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Tuner A19
Designed 1932. Frequency Range 15 to 559 kc/s. Fitted with outfit CM and CN.
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Tuner A41
Designed 1926. Frequency Range 60 to 650 kc/s. Fitted with Outfit SD. Quote.....It has been found that when the Bellini Tosi system of aerials is connected to the D/F set by long lengths of lead cased cables, their capacity is usually between 1 and 2 jars and tunes with the aerial circuit to a natural frequency of the order of 450 kc/s. To avoid excessive interference from signals transmitted on 500 kc/s, a high degree of selectivity is necessary and this is obtained by tuning the search coil circuit and coupling it to the tuned grid circuit of whatever amplifier may be in use. Unquote
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Tuner A42
Designed 1927. Frequency Range 60 to 670 kc/s. Fitted with outfit SF.
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Tuner A43
Designed 1928. Frequency Range 60 to 690 kc/s. Fitted with D/F outfit SGK
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Tuner A44
Designed 1928. Frequency Range 460 to 1200 kc/s. Fitted with D/F outfit SGX
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Tuner A46
Designed 1931. Frequency Range 60 to 600 kc/s. Fitted with D/F outfit SE, SG and RM.
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Tuner A47
Designed 1931. Frequency Range 60 to 600 kc/s. Fitted with D/F outfit SE, SG and RM.
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Tuner A50Amplifier M50
Designed in 1938. Frequency Range 15 to 600 kc/s. Fitted with receiver outfit CAA.
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Tuner Amp. B3
Designed in 1923. Frequency Range 750 to 1500 kc/s. Fitted with Receiver Outfit RA. This receiver was designed to work with a Transmitter Type 81 for R/T.
Details
Tuner Amp. B5X
Frequency Range 5.76 to 20 MHz and 3 to 6.81 MHz. This file on the right dates from 1925 but as importantly, was obviously typed onboard a ship on a very rough sea - the typing is really "wavy-navy" !
Details
Tuner Amp. B6
Designed in 1928. Frequency Range 3500 to 20000 kc/s. Fitted with outfit QK.
Details
Tuner Amp. B9
Designed in 1928. Frequency Range 3000 to 25000 kc/s. Fitted with Receiver Outfit QL. Note the top picture is the "B9 New" and the bottom " B9 Old". Quote.....B9 is designed as the HF receiver in Sloops etc., normally employed on detached service. It is no use for Fleet work owing to the fact that the amplifier is designed to oscillate and hence re-radiation takes place (see Admiralty Handbook of W/T (1931) paragraph 693(1)).
Details
Tuner Amp. B11
Designed in 1930. Frequency Range 1500 to 23000 kc/s. Designed to improve HF long distance reception. With it came a "quick wave change condenser dials" package shown in the link below.
ImagesQuick Wave Changing
Tuner Amp. B12
Designed in 1931. Frequency Range 150 to 1500 kc/s. A supersonic heterodyne set (SUPERHET). With it came a "quick wave change condenser dials" package shown in the link below.
ImagesQuick Wave Changing
Tuner Amp. B13
Designed in 1932. Frequency Range 15 to 20000 kc/s. Quote.....The B13 has been designed as a stand-by receiver to replace any other receiving set [except for V.HF ] and is the only receiver in certain small vessels. Unquote
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Tuner Amp. B13X
The file on the right is a simple file about a 1932 receiver.
Details
Tuner Amp. B19
Designed in 1937. Frequency Range 40 to 13500 kc/s. Tuner Amplifier B19 was originally designed as a receiver for the transportable set Type 52T.
Details
Tuner Amp. B35
It looks very much like a B28, and of course it is a Marconi CR100 but a type 2 and not a type 4. Note that because it was not a communications receiver it wasn't given an outfit letter from CAA to CUZ. This was a D/F receiver used in various D/F Outfits.
DetailsImages
Tuner Amp. B50
Designed in 1938. Frequency Range 550 to 23000 kc/s. Fitted with receiver outfit CAD.
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Tuner Amp. B23/B23A
D/F Receivers of WW2 [1940 and 1942] with different frequencies and for different D/F Outfits [FM7 and FM4].
Details
Wavemeters G51, G52, G56, G57
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Wavemeter G31XSelf Quenching
Details
Wavemeter 1492 and G9
Used for the tuning of transmitters and receivers. The 1492B was superseded by the G9 Wavemeter
Details 1492BDetails G9
Wavemeter Outfit G61/G62
Designed in 1937. Frequency Range G61 1000 to 24000 kc/s (in 5 ranges). G62 15 to 2500 kc/s (in 8 ranges).
Details
Wavemeter Outfit GN
The wavemeter was an indispensable tool for making sure that a Transmitter or a Receiver were TUNED to the correct operating frequency. There were many of them and a well trained and experienced W/T operator could quickly change frequency guided by the tell-tale indicators of such machines. Individual transmitter and had free tuning oscillators which did the job, oscillating that is, albeit without the associated and necessary accuracy demanded. Eventually, wavemeters used quartz crystals to control the measuring source and afforded the accuracy we all take for granted today. This ultimately led to each separate piece of equipment (transmitter and receiver) having their own crystal controlled oscillators which many years later were supplanted by frequency standards and frequency synthesisers. Wavemeters for tuning were portable equipments, and any wavemeter could be used to tune a receiver as long as it was used in conjunction with an oscillator, a buzzer, and a heterodyne set. The GN was one such Wavemeter Outfit, and every member of the W/T Brach knew of its capabilities and how to operate it. This file gives one a good and clear understanding of how important this device was especially during in World War Two. During this time there were long periods of radio silence, but when lifted, especially to transmit enemy reports which conveyed critically important data for Command and Control, W/T personnel had to be sure that their transmitter were EXACTLY on the correct frequency so that distant stations would not miss these 'win or lose' messages which were transmitted inside a tiny and unheralded 'window' and desirably, only the once. Likewise, a ship setting watch on a circuit which might at that time be subjected to radio silence in the hope of hearing any enemy reports, if transmitted, had to make sure that they were indeed ready in all respects on the correct frequency, the correct emission set and the correct bandwidth set. The link below contains text, pictures, schematics and line drawings.
Details
For possible further information you may wish to look at the early versions of BR222 |
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TYPE |
INFORMATION |
DETAILS/IMAGES |
| Amplifier LB | Designed in 1917. Frequency Range 60 to 1000 kc/s. Fitted to receiver outfit LB in conjunction with Type 31 transmitter for gunnery control. | |
| Amplifier M3B | Designed in 1923. Frequency Range 30 to 1800 kc/s. Fitted to receiver outfit CI and MH. | |
| Amplifier M4 | Designed in 1924. Frequency Range 1500 to 6000 kc/s. Fitted to receiver outfit CE and CG. | |
| Amplifier M5 | Designed in 1926. Frequency Range 450 to 2000 kc/s. Fitted to receiver outfit CH, CI and CL. | |
| Amplifier M9 | Designed in 1928. Frequency Range 60 to 670 kc/s. Fitted to receiver outfit CK, CL and D/F outfits SA, SD, SF and SGK. | |
| Amplifier M11 | Designed in 1926. Frequency Range 12 to 550 kc/s. Fitted to receiver outfit CI and CJ. | |
| Amplifier M13 | Designed in 1929. Frequency Range 12 to 60 kc/s. Fitted to receiver outfit SF. | |
| Amplifier M19 | Designed in 1932. Frequency Range 15 to 550 kc/s. Fitted to receiver outfit CN and CM. | |
| Amplifier MBBox Model | For those of you who have not read the Pre WW1 Files from 1900 to 1913 you may perhaps not know how to work in 'LS' units as regularly mentioned in those files. It would be a pity were you to miss out these files for they are packed to the limit with interesting detail of the beginnings of the W/T Branch in the Royal Navy. However, if you look at the 1913 page and then scroll down to the 'Aerial Flown From Kites.pdf' section you will see the formula in a worked example - there are many other incidences of these worked examples from 1900 to 1913 files. The LS of a circuit is the tuned circuit represented by capacitance and inductance [L and C] and the resultant circuit is resonant to a specific frequency. The formula is wavelength in feet = 206 square root of LS so, when the text tells you that a range of waves is from 11LS to 50LS it means wavelength in feet = 206 x 3.317 {this is the square root of 11} = 683.3 feet x 12 [to bring it to inches] = 8199.62 " ÷ 39.3 [to bring it to metres] = 208.64 meters = FROM 1.437 MHz - repeat that for 50 LS = TO 670 kHz. Meters, remember, are converted to MHz or parts of a MegaHertz by dividing 300 [a derivation for the speed of light = velocity] by the number of meters e.g. 300 meters = 1 MHz, or 30 meters = 10 MHz, and 650 meters would be 0.461 MHz or 461 kHz etc. Look at th link to understand how it was done at around the time of the First World War | |
| Amplifier MBABox Model | I'll wager that there are few if any equipments which have been named the same since receivers and transmitters joined the Royal Navy. This file is the story of a WW1 W/T Receiver, but in the early 1950's, when the missile 'SEASLUG' was first commissioned into the County Class Destroyers, the controlling transmitter/receiver, apart from the 901 Radar, was an outfit called "MBA" which is shown on this site under the page heading of "MISCELLANEOUS". See the link under Scuttle MB for instructions on how to convert meters to frequency and the LS system. | |
| Amplifier MD | Designed in 1922. Frequency Range 60 to 500 kc/s. Fitted to receiver outfit MD and D/F outfits SA and SD. | |
| Battery Power | ||
| Buzzer Test G21 | Designed in 1926. Fitted into D/F Outfit SD Quote.....G21 is a buzzer tester for D/F and was introduced to meet the need for an instrument which could be made to influence each loop aerial to exactly the same extent. If the two loops are identical (as in shore D/F stations) and are equally energised the zero will be found to be at Green 45 degrees. In a ship where the fore and aft aerial is usually smaller than the beam aerial the zero will be found to be nearer the bow at about Green 30 degrees. Unquote. | |
| Detector | Covers all waves. Fitted into Receiver Outfits EE, CG and CI when fitted in Destroyers. | |
| Detector E25XHeterodyne | Designed in 1930. Frequency Range 7500 to 23000 kc/s. A superhet receiver used for automatic high speed reception with amplifier M16. | |
| Detector E26XHeterodyne | Designed in 1930. Frequency Range 700 to 20000 kc/s. A superhet receiver fitted in D/F outfit SGX. | |
| D/F Training Units | ||
| Goniometer S25 | A sample of radio goniometers which were portable devices and could be used with several D/F outfits. See links to the right. | |
| Heterodyne Unit K5 | Designed in 1922. Frequency Range 13.5 to 2500 kc/s. Low power heterodyne unit with one valve, a tuned grid and a coupled anode. | |
| Heterodyne Unit K7 | Designed in 1931. Frequency Range 60 to 600 kc/s. Fitted to D/F outfits SG and SHX. | |
| Interference & Measurement | ||
| Note Magnifier N9 | Designed in 1924. Frequency Range 15 to 550 kc/s. Can be used with any amplifier for the production of earphone signals. | |
| Note Magnifier N19 | Designed in 1932. Fitted in receiver outfits CM and CN. | |
| Note Magnifier N22 | ||
| Oscillator G31 | Designed in 1928. Frequency Range 1500 to 25000 kc/s. Supplied for tuning receiver sets. | |
| Oscillator G33 | Designed in 1934. Frequency Range 15 to 24000 kc/s. Supplied for tuning receiver sets. | |
| Oscillator G35 | Oscillators (just like wavemeters, buzzers and heterodyne equipments) were very important tools for the management of W/T equipments both transmitting and receiving: see also Wavemeter Outfit GN. Oscillators had three basic roles. They could act as a local oscillator when setting a receiver to a desired frequency; measure the frequency of an in-coming radio transmission, or measure the frequency of a local out-going transmission. The link below show a picture and explains a little bit about the technicalities of a Naval Oscillator. | |
| Quench | ||
| Receivers | ||
| Receiver Valves | ||
| RN Receiving Apparatus 1922 | This rather tattered report was written in 1922 and looked back to the pre-WW1 years. It is produced here just as a matter of interest for those interested in the early circuitry of receivers just pre and post WW1. This file shows just the first few pages. The file is extremely technical and not suited for general reading | |
| RN Receiving Apparatus 1939 | ||
| Receiver 62HOutfit CDV | Frequency Range 100 to 156 Mc/s crystal controlled. A standard V.H.F. Receiver Outfit fitted in ships and shore stations as a replacement for Receiver Outfit CDU. It is used in conjunctions with Type 87M/MS/P. When during WW2 the VHF AM Transmitter Type 87 was introduced it came with its own 87 receiver as an option. It wasn't a popular receiver and unlike its brother transmitter had many problems. It was relieved by the Receiver CDU/P104. However, not long afterwards, Their Lordships chose this Receiver, the 62H [which they called the CDV] to take the place of the CDU/P104. The choice was obviously good for it lasted out the useful life of the transmitter Type 87. | |
| Receiver 87 (Original Receiver) | Designed 1941. Freq Range 100 to 124 Mc/s. As a component of Type 87 in Cruisers and above. For R/T communications with fighter aircraft. May also be used for the reception of C.W. signals. RAF Power Supply Unit Type 3, requiring 190/250 volts 50 cycles single phase A.C. supply. | |
| Receiver P104Outfit CDU | Frequency Range 100 to 150 Mc/s crystal controlled. When during WW2 the VHF AM Transmitter Type 87 was introduced it came with its own 87 receiver as an option. It wasn't a popular receiver and unlike its brother transmitter had many problems.Their Lordships chose this Receiver, the P104 (which they called the CDU) to take the place of the 87 VHF Receiver and it worked well for some time. However, they put this receiver 'out to grass' and in its place brought in a third receiver, the CDV/62H, of which we will hear about later. Fitted where a VHF requirement was most relevant. | |
| Receiver 394 F/G | Frequency Range - E Version 150 to 3000 kc/s and F Version 150 to 4200 kc/s. The Marconi Receivers 394E and 394F were fitted in very small craft e.g., ML's, MTB's etc and in some minor W/T shore stations. They were fitted in association with the Marconi Transmitter TW12. So, for some of its information, have a look at the Transmitter Matrix to Transmitter TW12 scuttle. The link below tells one about the next size up {!} namely a few notes on the 'G' version {with a mention of the 'F' version} which is very similar to the versions already mentioned. | |
| Receiver 682/P40 | Frequency Range - 89 to 95 MHz with Type 682 Tx 7AM AP 27944 and CDK Receiver P40 AP 7945A. 65 to 85 MHz with Type 682M Tx 7AM AP 53175 and CDQ Receiver P40 AP56187A. It is used on handcarts, vehicles, and other craft as the main or supplementary equipment. It may be installed with or without remote control and may be set up for SIMPLEX or DUPLEX working. It is crystal control and operates [TX and RX] on pre-determined spot frequencies. Power requirements are LT 12V @ 3 AMPS/HT 330V @200mA DC. The microphone and modulator require 4V @ 30-40mA DC. Power output was 7 - 10 Watts. A station set up to use Type 682 and outfit CDK or Type 682M and outfit CDQ, requires, in addition, one or more of the aerial outfits AGU, AGY, AGW, AGP or AGO, which are supplied separately, and one or more of the following outfits:- Control Outfit KSC - for simplex working only. Control Outfit KSD - for duplex working with NO LINKING outfit employed. Control Outfit KSF - for duplex working WITH a LINKING unit employed - this outfit is required where the AUDIO input and output are to be extended for other purposes e.g. connection with a field telephone exchange or relaying through another circuit. Aerial Switching Unit Outfit ESC - for simplex working only. In its time [1945] this set can either be thought of as 'simple' or 'very sophisticated', the latter having every conceivable device option fitted to the Type 682/Type 682M. The FACILITIES available were as follows:- Simplex - Available with either local or remote positions. In both instances HT switching of the transmitter is carried out by means of the pressel switch in the handset. Duplex - Operation is available with either local or remote positions. HT switching of the transmitter is or is not possible at the handset according to the outfit used. With duplex operation, the radio station can be connected to a field telephone exchange so that any extension of this exchange can speak over the radio link. Teleprinter - Teleprinter operations of a duplex link is possible. This requires a teleprinter, teleprinter terminal unit, teleprinter rectifier unit and an S + DX MkII in addition to the outfits described. Relay - Where 2 complete installations are fitted in close proximity to one another, as in Radio Van 29, the installation may be linked together so that what one station receives can be re-radiated on the other circuit and vice versa. | |
| Receiver AR88 | Frequency Range 535 kc/s to 32 Mc/s. An HF/MF receiver outfit fitted in some Royal Navy Shore Wireless Stations | |
| Receiver B21 | What has been written for the B21B the Receiver for the FH3, applies equally here for this receiver. You will note by comparing photographs [both of which appear below] that the bottom left control and the central bottom control on the 21B and much modified from this, the B21 version. | |
| Receiver B21B | Frequency Range 1 to 20 MHz. The receiver is designed for use with D/F outfit FH3. | |
| Receiver B34 | ||
| Receiver B46/B47Outfit CAI to CAP | Frequency Range B46 - 1.4 - 15 Mc/s continuous in three ranges. B47 - 15 - 27 kc/s continuous in single range and 40 - 500 kc/s continuous in three ranges. The CAJ to CAP Series of receivers reflects the receivers associated with the Transmitter 612, when fitted separately as receiver only kits. Fitted mainly ashore in W/T stations. | |
| Receiver Outfit CAS | Capable of CW, MCW and Voice reception. Frequency Range 59 to 555 kHz and 1.47 to 30 MHz in five bands. An HF/MF receiver associated with the low power transmitter 618, together fitted as the emergency HF transmitter in frigates or above, and as the main receiver in small vessels. Fitted widely throughout the Fleet.. | |
| Receiver Outfit CAT | Designed in 1952. Frequency Range 60 kc/s to 32 Mc/s. An HF/MF receiver associated with the low power transmitter 619, together fitted as the emergency HF transmitter in frigates or above, and as the main receiver in small vessels. Fitted widely throughout the Fleet. | |
| Receiver Outfit CAU | Army Receiver R209. Frequency Range 1 to 20 MHz in four bands. Of 1953 vintage to the Royal Navy and 1946 to the Army. Link to the right provides a little bit of information with a photograph supported by a good line drawing of the front panel and its controls./td> | |
| Receiver Outfit CFA | Frequency Range 14 to 22. kHz. This was a VLF receiver fitted into submarines. Fitted widely throughout the Submarine Fleet. | |
| Receiver Outfit CGG | Army Receiver R201. Frequency Range 1.5 to 22 MHz. An HF receiver outfit fitted ashore in W/T stations. Capable of CW and R/T, Triple Diversity | |
| Receiver CRD 150Outfit CGE | Could it be a B28 or a B35? It comes from the same stable, namely from the Marconi Company. This is known as a CR 150 {B28/B35 were variants of the CR 100 series} and whilst it was used in an Admiralty system for W/T Shore Station fit as the Receiving Outfit CGE, it was never used as a stand alone general communications receiver. For that reason it did not receiver an Admiralty name. The frequency range of the CR150 was between 2 and 60 Mc/s {yes, 60 Mc/s} and they called this a "High Frequency Band Receiver" rather than a H/F Receiver. It was a double superhet. As a system fit the diversity was achieved as shown in this diagram. | |
| Receiver Outfit CGH2 x B40 | Frequency Range .65 to 30.6 MHz. An MF/HF receiver outfit fitted ashore in W/T stations. Capable of CW and R/T, Triple Diversity. | |
| Receiver Outfit CGK | Outfit CGK is part of a suite of receivers fitted in Shore W/T Stations for frequency diversity. | |
| Receiver Outfit CGN2 AR88LF Receivers | Frequency Range 73 kHz to 30.5 MHz when fitted with AR88LF receiver. Part of a suite of receivers dealing with diversity and fitted into some of the RN W/T Shore Stations. | |
| Receiver Outfits CGP/CGR | Shore fitted dual diversity receivers. Click on the link below and scroll to Section 2 where you will see reference to the CGP and CGR (plus other receivers already covered in the matrix) | |
| Receiver Outfit CGR | Frequency Range 1 to 30 MHz. A dual space diversity receiver for automatic morse or teleprinter working. | |
| Receiver H23Outfit CGL | Frequency Range 3 to 27.5 MHz. Shore fitted. Triple diversity receivers. | |
| Receiver Outfit CHD | Fitted on shore bases. Used to measure accurately the characteristics of a transmitted radio signal. | |
| Receiver Outfit CJA | The main HF Fleet receiver from the early 1960's and fitted in all ICS1 [STANDARD 3A] ships/submarines and also in ICS 1 Mixed Fit [STANDARD 3B] ships. After the introduction of the FTA, is could receive all frequencies from VLF to HF. See also 'COMIST/ICS' in the TRANSMITTER section matrix. | |
| Receiver Outfit CJD | The main LF/MF Fleet receiver from the early 1960's and fitted in all ICS1 [STANDARD 3A] ships/submarines and also in ICS 2 ships [STANDARD 3C]. It was also fitted into Mixed Fits and thus into STANDARD 3B and 3D ships. See also 'COMIST/ICS' in the TRANSMITTER section matrix. | |
| Receiver Outfit CJK | Designed Late 1950s. The main HF/MF receiver in the Fleet during the pre and actual COMIST period dating from the late 1950's until the mid 1960's. It was synthesised and thus very stable, but compared with the receivers which replaced it, it was a complicated set up having many inter-related parts. Fitted widely throughout the Fleet. See also 'COMIST/ICS' in the TRANSMITTER section matrix. | |
| Receiver Outfit CJM | The main HF Fleet receiver from the mid 1960's and fitted in all ICS 2 ships [STANDARD 3C]. It was also fitted into Mixed Fits and thus into STANDARD 3D ships. After the introduction of the FTA is became the main Fleet receiver capable of receiving all frequencies. See also 'COMIST/ICS' in the TRANSMITTER section matrix. | |
| Receiver Outfit CJP | Part of the emergency transmit/receive outfit 643, although it can be fitted as a stand-alone receiver. Fitted widely throughout the Fleet. | |
| Receiver Outfit CN | ||
| Receiver P116Outfit CUH | Frequency Range 277 to 283 MHz crystal controlled - ten switched frequencies. A medium sized pre-channelled UHF receiver associated with the transmitter 691. It was fitted either as the only UHF equipment or additional UHF equipment to the CUJ receiver. Fitted widely throughout the Fleet. | |
| Receiver Outfit CUJ/CUL | Designed in the 1950s. The main Fleet UHF receiver in the 1950s, 60's and 70's - associated with the transmitters 692 and 693. Fitted widely throughout the Fleet. | |
| Receiver DST100 | Frequency Range 50 kHz to 30 MHz. An MF/HF receiver outfit fitted ashore in W/T stations. CW and R/T, High degree of intelligibility to the reception of weak signals. | |
| Receiver HR71 Receiver Outfit CHA | Part of the W/T Shore Station suite of receivers, this one dealing with Remote Controlled facilities. Rather than show you yet another receiver or control panel, here we simply show a concept where the RECEIVER is in the W/T Shore station, and the OPERATOR is some distance away in a COMMCEN [Communications Centre]. In the basic block which follows, the W/T Station and its receiver [HR71] is in the right side block being fed by an aerial, and the operator, in the left side block, sits controlling his [HR72]. Note the PO LINES [Post Office Line] in the middle of the two blocks. The top line is sending from the operator to the receiver [left to right] and the bottom line, from receiver to operator [right to left]: they are both transferring AF [audio frequencies] in the range 200 to 3100 cycles [c/s]. On the receiver side, note that the aerial connection route is via a ganged switch which is drawn 'connected', so the signal flow is RF across that switch to the receiver for de-modulation, then AF out of the receiver on the adjacent parallel line to the LP Filter [on the bottom] via the ganged switch to the output transformer. AF OUT to the transformer is either via the LP [Low Pass] Filter or the Frequency Shift Oscillator, the latter being using for a 10 kc/s calibrator oscillator. The AF arrives at the operators headphones via the top LP Filter. When the operator needs to change the parameters on the distant receiver, he operates the required spot frequency signal choice, the modulators, the operate button which in turn creates a magslip voltage and a discriminator voltage which alter the receivers setting. | |
| Receiver RA9Receiver Outfit CHE | Frequency Range any two channels between 2.5 and 20 Mc/s in three ranges. Used as a long range air to ground voice link receiver. | |
| Receiver RA 17LReciver Outfit CGS | ||
| Receiver RA17 & RA17LReceiver Outfit CHB/CHC | Frequency Range 980 kHz to 30 MHz. Fitted in shore stations and in some Fleet units chiefly diesel submarines. | |
| Receiver RA17LReceiver Outfit CGT/CHJ/CHK | Highly stable receivers replacing the CHC/CHB series in RN W/T shore stations. | |
| Receiver P33 | Frequency Range 150 to 550 MHz. A very small receiver ! It is a five autodyne consisting of a 'frequency changer', a two-stage IF amplification, a detector and the AF amplifier. Autodyne simply means that an Autodyne oscillator, in a receiving device, generates the local oscillations required for beat reception [BFO] in addition to performing its other functions, such as amplification and/or detection; a clever valve/circuit for those days. Its use [covered by a Confidential Book which we do not have] and its frequency range of 150 to 550 Mc/s, suggests that it belonged to the RCM Department [Radio Counter Measures - the EW of today] and because of its tiny size, in a covert rather than an overt role ! | |
| Receiver P38 | This handbook was primarily written to cover Receiver P38 (Patt. W7963). Receiver P48 (Patt. 54491) is identical with P38 except for the following:- Condenser 2 - 8 micromicrofarads (C1) in P38 is replaced in Receiver P48 by a 5 - 55 micromicrofarad condenser controlled by a knowb (K1) on the front panel (see fig below) and the 5 micromicrofarad ceramic condenser (C124) connected in parallel with C1 is omitted in Receiver P48. | |
| Receiver P42VHF Type 2 Naval | The receiver is designed for mobile or headquarters operation on telephony, modulated or intrrupted C.W. at a fixed frequency in any one of 14 groups. | |
| Receiver D/F SA | ||
| Receiver D/F SD | ||
| Receiver Outfit SEARemote Control | ||
| Receiver D/F SF | Designed in 1938. Frequency Range 60 to 670 kc/s for D/F reception and 15 to 170 kc/s other reception. Fitted with vertical frame coil for D/F and a vertical loop aerial or horizontal frame coil for non-D/F reception. This was a SUBMARINE D/F Set and was fitted in 'O' Class boats. | |
| Receiver D/F SGX | Designed in 1930. Frequency Range 60 kc/s and above. Fitted aloft in the highest part of the ship above all other aerials and metal work. | |
| Receiver SX28 | Frequency Range 550 KHz to 43 MHz. An MF/HF commercial receiver fitted into some of th RN's shore W/T stations. CW and R/T. | |
| Receiver Q2X | Designed in 1930. Frequency Range 5000 to 75000 kc/s. Fitted in Type 75X (in heavy ships) and as a VHF quench receiver. | |
| Receiver Q4Quench Unit P2 | Designed in 1926. Frequency Range 18500 to 29000 kc/s. Fitted in Type 71 (in heavy ships) with receiver outfit QB. | |
| Receiver Q7 | Designed in 1928. Frequency Range 17500 to 30000 kc/s. Fitted in Type 71, 47, 48Y and 46X (in heavy ships) with receiver outfit QC. | |
| Receiver Outfit QBX | ||
| Receiver QD | Frequency Range 38 to 59 Mc/s. This was an off-the-shelf procurement from the very famous Hallicrafters stable. Like all receivers in the 'Q' Series, this one was an intercept receiver generally used as a RCM [Radio Counter Measures] device rather than a general purpose receiver in the high frequency range. | |
| Receiver QP | A receiver of vintage 1946 which was involved in RCM - EW Speak for Radio Counter Measures. For those of you au fait with the mounting of the aerials for the QR and QS receivers [on an angle of 45 degrees] to receive both horizontally and vertically polarised signals, the QP aerial fit [shown in this file] is identical. The file contains a picture of the main receiver forming this outfit. | |
| Receiver QR | Frequency Range 10 to 165 MHz. A VHF AM and FM receiver usually sited in the WEO. Fitted widely throughout the fleet. | |
| Receiver QS | Frequency Range 19 to 165 MHz. A VHF AM and FM receiver usually sited in the EWO. Fitted widely throughout the fleet. | |
| Receiver TCS | Capable of CW, MCW and Voice. Frequency Range 1.5 to 12 Mc/s in three ranges. A receiver which was an integral part of the TCS system. To best show this WW2 American addition to our W/T suite, we have produced a PDF file which shows the whole system, including a close-up of the RECEIVER. The file is also shown on the TRANSMITTER matrix also. The receiver turned out to be a problem, and a very real problem too. Superhet receivers have a local oscillator which mixes with the RF stage to produce an IF stage[ Intermediate Frequency], the very essence of heterodyning. Unfortunately for us [all and any communicators using this receiver] the LO was a pretty powerful oscillator which not only oscillated as part of the heterodyne system, but also oscillated direct to the aerial. The original system worked in simplex mode i.e., it had a send/receive relay controlling the use of one aerial. When not transmitting for real [an intentional event] the relay biased itself to the reception side connecting the aerial to the receiver and its RF stages. Whilst in this position, it transmitted the output of the LO [rather like a TV receiver does which the proverbial TV Licence Monitor Van can so easily read/intercept and thus pinpoint] and unwittingly broke the rules of RADIO SILENCE. The LO could be D/F'ed even though every Morse key and Pressel switch in the ship was isolated [by order]! It soon became obvious that either a modification had to be performed on the front end of the receiver or that the receiver had to be disabled. The Royal Navy chose the disabling and quite often removed the TCS receiver from the system fit. There was a precedent ! If you look through the scuttle called TUNER AMPLIFIER B9 {written in 1928} you will see why a receiver, without a 'harnessed radiation', couldn't be issued to the Fleet for use where there were many ships together in formation. Once a D/F fix had been made on the hapless radiating ship, all ships in company would have been targeted as one group. Fitted widely throughout the Fleet which included submarines. Click here TCS.pdf for a description, and here FULL TCS SYSTEM.pdf for system. In the links below you will see a good picture of the receiver and its connections in the system. | |
| Receiver B28 CDC/CDL | The B28 was for many years, throughout WW2 and afterwards, the main Fleet MF/HF Receiver. Outwardly, its switches and controls were simple and uncluttered when compared with the B29, and it was a superhet receiver, as opposed to the TRF (Tuned Radio Frequency) of the B29. In most cases, a ship would have several B28's fitted to just the odd B29. Note the three out of four names this receiver was called throughout the years. In the first of three pictures there is a reference to the "CR100", the manufacturers name and also to "Tuner-Amplifier B28" its name when first entering service with the Navy: the Type 65 is fully covered in the Transmitter Matrix. The second picture refers to it as being a "CDC" which is its official sea-going name whilst the third picture simply repeats its original Naval title. Its fourth title was "CDL" which it assumed when fitted ashore in Naval W/T Stations. | |
| Receiver B29 CDF/CDM | Frequency Range 15 to 550 kc/s. Fitted widely throughout the Fleet. The B29 was for many years, throughout WW2 and afterwards, the main Fleet LF/MF Receiver. Outwardly, it was much more complicated to look at than was the B28, and it was a 'straight' receiver, a TRF (Tuned Radio Frequency) set, unlike the B28 which was a superhet. In most cases, a ship would have several B28's fitted to just the odd B29. | |
| Receiver FAZAdaptor Outfit | A device which adds an SSB facility to a receiver not designed to receive such signals. It is associated with the receivers CDW and CDY, which, with the FAZ added, were used mainly as general purposes receivers in the monitoring of SSB Voice and F1 RATT signals for engineering purposes. Fitted widely throughout the Fleet. Generally speaking, the B40D catered for SSB voice and F1 RATT at a wide shift of 850Hz whereas the B41C was used only for F1 RATT at a narrow shift of 85Hz or 50Hz. | |
| Receiver FTAUp-Converter | An up-converter built into the receiver aerial input system. Receives from 7kHz to 2.2MHz and mixes this range with a 5MHz source coming from the Frequency Standard FSA. The resultant highly accurate result of 5007kHz to 7200kHz is then fed to a standard HF receiver [switched to the FTA line] tuned as required, so that if, say, 16kHz was needed, the HF receiver would be tuned to 5016.0kHz. See also COMIST/ICS on the TRANSMITTER matrix. | |
| Receiver HRO | Frequency Range 50 kHz to 530 kHz and 480 to 30 MHz. An MF/HF commercial receiver fitted into some of th RN's shore W/T stations. CW and R/T. | |
| RFA Commcercial Receivers | The link on the right provides details for some of the receivers many of which, at one time or another, were fitted into our RFAs. Look paricularly at the following: ALERT, ATLANTA, ELECRA, LODESTONE, MERCURY, SEAGUARD, VIGILANT. | |
| Sense Finder S41 | Designed in 1923. Fitted with D/F outfit SD. Formerly called the Eliminator Reciprocal Bearing. | |
| W/T Rx Handbook - Tuners | ||
| Tuner A4 | Designed 1924. Frequency Range 1500 to 6000 kc/s. Fitted with receiver outfits CE and CG | |
| Tuner A5 | Designed 1926. Frequency Range 450 to 2000 kc/s. Fitted with receiver outfits CH, CI and CL. | |
| Tuner A7 | Designed 1928. Frequency Range 60 to 170 kc/s. Fitted with D/F Outfit SF. A7 is a very simple tuner fitted in conjunction with amplifier M9 for use with a horizontal frame aerial. As can be seen from the equivalent diagram, the tuner merely places an LC circuit in series with the frame coil. A separate heterodyne is always to be used for CW reception. | |
| Tuner A8 | Designed 1929. Frequency Range 15 to 60 kc/s. Fitted with D/F Outfit SF. Tuner A8 is fitted in conjunction with amplifierM13 for use with a vertical loop aerial. It must be remembered that when employing this model, better reception will be obtained when the loop is pointed approximately in the direction of the transmitting station. Good signals will, in fact, only be obtained if the transmitting station is on or before the receiving vessel's bow, or on or abaft her quarter. | |
| Tuner A9 | Designed 1928. Frequency Range 60 to 70 kc/s. Fitted with outfit CK. | |
| Tuner A11 | Designed 1927. Frequency Range 12 to 550 kc/s. Fitted with outfit CI and CJ. | |
| Tuner A19 | Designed 1932. Frequency Range 15 to 559 kc/s. Fitted with outfit CM and CN. | |
| Tuner A41 | Designed 1926. Frequency Range 60 to 650 kc/s. Fitted with Outfit SD. Quote.....It has been found that when the Bellini Tosi system of aerials is connected to the D/F set by long lengths of lead cased cables, their capacity is usually between 1 and 2 jars and tunes with the aerial circuit to a natural frequency of the order of 450 kc/s. To avoid excessive interference from signals transmitted on 500 kc/s, a high degree of selectivity is necessary and this is obtained by tuning the search coil circuit and coupling it to the tuned grid circuit of whatever amplifier may be in use. Unquote | |
| Tuner A42 | Designed 1927. Frequency Range 60 to 670 kc/s. Fitted with outfit SF. | |
| Tuner A43 | Designed 1928. Frequency Range 60 to 690 kc/s. Fitted with D/F outfit SGK | |
| Tuner A44 | Designed 1928. Frequency Range 460 to 1200 kc/s. Fitted with D/F outfit SGX | |
| Tuner A46 | Designed 1931. Frequency Range 60 to 600 kc/s. Fitted with D/F outfit SE, SG and RM. | |
| Tuner A47 | Designed 1931. Frequency Range 60 to 600 kc/s. Fitted with D/F outfit SE, SG and RM. | |
| Tuner A50Amplifier M50 | Designed in 1938. Frequency Range 15 to 600 kc/s. Fitted with receiver outfit CAA. | |
| Tuner Amp. B3 | Designed in 1923. Frequency Range 750 to 1500 kc/s. Fitted with Receiver Outfit RA. This receiver was designed to work with a Transmitter Type 81 for R/T. | |
| Tuner Amp. B5X | Frequency Range 5.76 to 20 MHz and 3 to 6.81 MHz. This file on the right dates from 1925 but as importantly, was obviously typed onboard a ship on a very rough sea - the typing is really "wavy-navy" ! | |
| Tuner Amp. B6 | Designed in 1928. Frequency Range 3500 to 20000 kc/s. Fitted with outfit QK. | |
| Tuner Amp. B9 | Designed in 1928. Frequency Range 3000 to 25000 kc/s. Fitted with Receiver Outfit QL. Note the top picture is the "B9 New" and the bottom " B9 Old". Quote.....B9 is designed as the HF receiver in Sloops etc., normally employed on detached service. It is no use for Fleet work owing to the fact that the amplifier is designed to oscillate and hence re-radiation takes place (see Admiralty Handbook of W/T (1931) paragraph 693(1)). | |
| Tuner Amp. B11 | Designed in 1930. Frequency Range 1500 to 23000 kc/s. Designed to improve HF long distance reception. With it came a "quick wave change condenser dials" package shown in the link below. | |
| Tuner Amp. B12 | Designed in 1931. Frequency Range 150 to 1500 kc/s. A supersonic heterodyne set (SUPERHET). With it came a "quick wave change condenser dials" package shown in the link below. | |
| Tuner Amp. B13 | Designed in 1932. Frequency Range 15 to 20000 kc/s. Quote.....The B13 has been designed as a stand-by receiver to replace any other receiving set [except for V.HF ] and is the only receiver in certain small vessels. Unquote | |
| Tuner Amp. B13X | The file on the right is a simple file about a 1932 receiver. | |
| Tuner Amp. B19 | Designed in 1937. Frequency Range 40 to 13500 kc/s. Tuner Amplifier B19 was originally designed as a receiver for the transportable set Type 52T. | |
| Tuner Amp. B35 | It looks very much like a B28, and of course it is a Marconi CR100 but a type 2 and not a type 4. Note that because it was not a communications receiver it wasn't given an outfit letter from CAA to CUZ. This was a D/F receiver used in various D/F Outfits. | |
| Tuner Amp. B50 | Designed in 1938. Frequency Range 550 to 23000 kc/s. Fitted with receiver outfit CAD. | |
| Tuner Amp. B23/B23A | D/F Receivers of WW2 [1940 and 1942] with different frequencies and for different D/F Outfits [FM7 and FM4]. | |
| Wavemeters G51, G52, G56, G57 | ||
| Wavemeter G31XSelf Quenching | ||
| Wavemeter 1492 and G9 | Used for the tuning of transmitters and receivers. The 1492B was superseded by the G9 Wavemeter | |
| Wavemeter Outfit G61/G62 | Designed in 1937. Frequency Range G61 1000 to 24000 kc/s (in 5 ranges). G62 15 to 2500 kc/s (in 8 ranges). | |
| Wavemeter Outfit GN | The wavemeter was an indispensable tool for making sure that a Transmitter or a Receiver were TUNED to the correct operating frequency. There were many of them and a well trained and experienced W/T operator could quickly change frequency guided by the tell-tale indicators of such machines. Individual transmitter and had free tuning oscillators which did the job, oscillating that is, albeit without the associated and necessary accuracy demanded. Eventually, wavemeters used quartz crystals to control the measuring source and afforded the accuracy we all take for granted today. This ultimately led to each separate piece of equipment (transmitter and receiver) having their own crystal controlled oscillators which many years later were supplanted by frequency standards and frequency synthesisers. Wavemeters for tuning were portable equipments, and any wavemeter could be used to tune a receiver as long as it was used in conjunction with an oscillator, a buzzer, and a heterodyne set. The GN was one such Wavemeter Outfit, and every member of the W/T Brach knew of its capabilities and how to operate it. This file gives one a good and clear understanding of how important this device was especially during in World War Two. During this time there were long periods of radio silence, but when lifted, especially to transmit enemy reports which conveyed critically important data for Command and Control, W/T personnel had to be sure that their transmitter were EXACTLY on the correct frequency so that distant stations would not miss these 'win or lose' messages which were transmitted inside a tiny and unheralded 'window' and desirably, only the once. Likewise, a ship setting watch on a circuit which might at that time be subjected to radio silence in the hope of hearing any enemy reports, if transmitted, had to make sure that they were indeed ready in all respects on the correct frequency, the correct emission set and the correct bandwidth set. The link below contains text, pictures, schematics and line drawings. | |