TRANSMITTERS & TRANSCEIVERS

Type 691 Transceiver

DATE OF DESIGN

FREQUENCY RANGE

277 to 283 MHz - 10 switched crystal controlled frequencies.

POWER SUPPLIES

75A - 115 or 230 Volt 50 to 60 Hz single phase at 300 W.
Type 691EF - AC Supply Outfit DWH
Tx & Rx - requires 24 V DC at 720 W obtained from Power Unit DC.

RANGE IN MILES.

TYPE OF SET (VALVES USED)

WAVEFORM

FM or AM Voice and MCW.

ASSOCIATED WAVEMETER.

METHOD OF PRODUCING OSCILLATIONS

WHERE USED/FITTED

A low power (10 watts) UHF transmitter/receiver used for ship/ship and ship/shore communication. Supersedes Type TBS and Type 682.

FURTHER READING

PHOTOS, SCHEMATICS, DOCUMENTS

Photographs.
Details of Type 691.

NOTES.

BR 2062 (1)(2)