DATE OF DESIGN

1. 3U L/F -1933
2.3U H/F - 1933
3. Low Power Transmitter - 1933

FREQUENCY RANGE

1. 3U L/F - 100 - 1700 kc/s.
2.3U H/F - 3000 - 18500 kc/s.
3. Low Power Transmitter - 100 - 1700 kc/s.

POWER SUPPLIES

1. 3U L/F - 3kW Motor Alternator with auto voltage control.
2.3U H/F - 3kW Motor Alternator with auto voltage control.
3. Low Power Transmitter - 100W Motor Alternator supplied from ship's 20V ring main.

POWER TO FINAL STAGE.

RANGE IN MILES

1. 3U L/F -250 miles.
2.3U H/F - World Wide at times.
3. Low Power Transmitter - 30 miles.

TYPE OF SET (VALVES USED)

1. 3U L/F - 3
2.3U H/F - 3
3. Low Power Transmitter - 1

WAVEFORM

1. 3U L/F -CW and ICW.
2.3U H/F - CW and ICW.
3. Low Power Transmitter - ICW

METHOD OF PRODUCING OSCILLATIONS

SELF.

WHERE USED/FITTED

Type 50P series is fitted in the W/T office of small sloops and gunboats and will supersede the existing sets in the second W/T office of certain capital ships and cruisers. The set will also be fitted in the second W/T offices of new construction small cruisers. It is a low/medium power set. The circuit used in the Transmitter 3U L/F has been designed to reduce, as far as possible, the frequency variations which are caused in self-excited transmitters by swaying aerials or feeder systems etc. In the earlier Type 50 sets two types of low poer tuning units were fitted, on having a frequency range of 100 to 700 kc/s and the other a frequency range of 375 to 2333 kc/s. The former was fitted with main office Type 50 sets and the latter with second office sets. The later pattern low power units have been designed to cover a frequency range of 100 to 1700 kc/s.

ASSOCIATED WAVEMETER

1. 3U L/F - G56.
2.3U H/F - G56.
3. Low Power Transmitter - G56.

FURTHER READING

Type 50 Power Supplies
Full Schematic
Auxiliary Switching Circuits

IMAGES, PHOTOS, DOCUMENTS, SCHEMATICS ETC.

Photos and Schematics

NOTES.