|DATE OF DESIGN||1925|
|FREQUENCY RANGE||Transceiver - transmitter 150 - 460 kc/s : receiver 65 - 500 kc/s|
|POWER SUPPLY||Supplied from engine which is part of the Set|
|TYPE OF SET||VALVE|
|WAVEFORM||CW - ICW and R/T|
|METHOD OF PRODUCING OSCILLATIONS||SELF|
|WHERE USED/FITTED||Portable Equipment. Type 30A is the name used in the Royal Navy for
the Army's Portable Set 'C' MkII. It is transported on a Trojan tyred cart.
The cart wheels and axle are removable and the cart provide a bench
for setting up the receiving station. The receiver is set up at
least 20 yards from the engine to prevent interference, thus dividing
the station into two parts which are:-
1. Transmitter with its engine driven generator, transmitting aerial and accessories.
2. Receiver with its frame aerial and accessories.
The transmitter is remote controlled from the receiving
The transmitter emits CW on 150 to 460 kc/s
and has a range of 40 miles using one 36 foot aerial; 20 miles with two
15 foot aerials and 3 miles with two 4 foot aerials.
Type 30A is fitted in many Fleet units and takes over from the Type 30.
To propel the set along a road with easy gradients, a minimum of four men is required, but with the set removed from the cart and transported in crates as explained in the Book of Instructions, six men are necessary as a minimum. The total weight complete is 1386lbs; without the car 828lbs; receiver and batteries only, 56lbs.
*Autodyne Reception, Self-Heterodyne Reception, are names given to those modes of beat reception in which the auxiliary oscillations are generated within windings and condensers that are essential parts of ordinary receiving circuits*
|ASSOCIATED WAVEMETER||Army Mk C|
|SMALL SCHEMATIC AND PHOTOGRAPHS||