DATE OF DESIGN

Pre WW2.

FREQUENCY RANGE

Transmitter is 136-500 kc/s & 1.5-15 Mc/s Master Oscillator Controlled, whereas the Receiver is a TRF on 111 kc/s - 15 Mc/s. However, if used as a transportable, the range is reduced to 1.5-10 Mc/s for the transmitter and 1.5-12.2 Mc/s for the receive.

POWER SUPPLIES

Accumulator with a dry HT battery for the receiver. HT for the transmitter is obtained from a 80 Watt battery driven motor generator. In the emergency fit a generator is driven from a 24V supply containing battery outfit BBE. For transportable use, a generator is driven from a 12V source. A small petrol driven generator is provided for charging the batteries.

RANGE IN MILES.

TYPE OF SET (VALVES USED)

VALVE

WAVEFORM

Originally designed to transmit on CW, ICW and R/T, when ship fitted, it usually emits a CW only signal although stores are available to include ICW also.

ASSOCIATED WAVEMETER.

1492B or G9

METHOD OF PRODUCING OSCILLATIONS

The transmitter is Master Oscillator controlled. The receiver is a 'straight receiver' i.e., [tuned radio frequency] without heterodyning.

WHERE USED/FITTED

The TX/RX combination is an RAF outfit designed for aircraft, but replaced by more modern equipment, and relegated for Naval use as either
(a) the emergency set fitted aft in Destroyers, or
(b), a transportable set for use by Naval landing parties.
This Naval use occurred during WW2.

FURTHER READING

Coil Settings for both Transmitter and Receiver.

PHOTOS, SCHEMATICS, DOCUMENTS

Photographs and Schematics.

NOTES.

N/K or N/A