|DATE OF DESIGN||1926|
|FREQUENCY RANGE||TRANSCEIVER. 750 - 2000 kc/s|
|POWER SUPPLIES||25W Generator/1000V and one 6V secondary battery|
|TYPE OF SET||VALVE|
|WAVEFORM||CW-ICW Receiver - ICW Transmitter|
|METHOD OF PRODUCING OSCILLATIONS||SELF|
|ASSOCIATED WAVEMETER||Fully incorporated|
|WHERE USED/FITTED||Portable Equipment. The Type 30P is a small W/T Portable set
designed by the Army [under the name of Army Set A Mark II as a pack set
for carriage by three men or one horse. This
is one member of the team, a very smart young sparker - wearing his
white naval topee. You will meet the other team members in a minute.
His cap tally reads HMS Queen Elizabeth
and she was a Dreadnought Battleship which saw service at Jutland - click on the thumbnail. As the loads weigh about 40 lbs however, the set can only be carried by the men, under these conditions, for short distances. For ease of transport over long distances two extra men should be detailed to carry the arms and equipment of the whole crew. An additional man is also required to carry a spare secondary battery if the set is to be used for more than 8 hours. A total crew pf 6 men should therefore be landed when the set is used on active service.
The set comprises of a transmitter, a receiver and a wavemeter incorporated into the transmitter. Its range is 5 miles, and despite the sailors demonstrating this kit, it was used by a Royal Marine striking force.
The primary power supply is from a 6V battery 40/50 ampere-hour. When the set is receiving all the necessary power comes from the battery, but when transmitting, the battery supplies [a] the transmit valve filament voltage and [b] acts as the motor end to supply the motor generator [part of the transmitter] which supplies 25 watts/1000 volts for the HT of the valve etc., and powers-up the transmitter.
The ICW Morse note can be varied by switching between 3 very distinctive notes of 900, 1100 and 1350 c/s allowing use of the same wavelengths for three separate groups of striking forces.
Fitted in ships carrying Marines and in large ships not carrying Marines.
|SMALL SCHEMATICS AND PHOTOGRAPHS||
The numbers run the same looking to the right of the group and to their
rear, with 58, 62 and 66 being the carriers from right to left and
55, 64, 61 and 52 being the kit carried. In top picture, the front
man carries 55, 55 being the whole of the transmitter except for the 6v
battery. The middle man carries 61 which is the receiver complete
and 64 is the aerial bag. The rear man carries 52 which is the
heavy battery and all the other bits and pieces necessary to run the