DATE OF DESIGN

N/K or N/A

FREQUENCY RANGE

N/K or N/A

POWER SUPPLIES

Power is provided by a Mallory type battery divided into two networks to supply the lamp separately from the electronic units. Capacity 72 hours at 11 V - 13 V.

RANGE IN MILES.

N/K or N/A

TYPE OF SET (VALVES USED)

N/K or N/A

WAVEFORM

N/K or N/A

ASSOCIATED WAVEMETER.

N/K or N/A

METHOD OF PRODUCING OSCILLATIONS

N/K or N/A

WHERE USED/FITTED

Submarine Indicator Buoy. To provide HF and UHF transmission plus a flashing lamp indicating a submarine in distress at a recoverable depth.

FURTHER READING

N/K or N/A

PHOTOS, SCHEMATICS, DOCUMENTS

Details of Transmitter Type 639.

NOTES.

BR 4122.