DATE OF DESIGN

1926.

FREQUENCY RANGE

Transceiver 750 - 2000 kc/s.

POWER SUPPLIES

25W Generator/1000V and one 6V secondary battery.

RANGE IN MILES

N/K or N/A

TYPE OF SET

VALVE

WAVEFORM

CW - ICW Receiver - ICW Transmitter

METHOD OF PRODUCING OSCILLATIONS

SELF

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 (see photographs) and she was a Dreadnought Battleship which saw service at Jutland. 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 of 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.
(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.

ASSOCIATED WAVEMETER

Fully incorporated

FURTHER READING

IMAGES, PHOTOS, DOCUMENTS, SCHEMATICS ETC.
(Click images to enlarge)

Photographs, Schematics, Documents

NOTES.

Notes on photos:

1 - HMS QUEEN ELIZABETH
2 -
3 - Transmitter Schematic
4 - Note No. 51 which is the 25W/1000V Generator. No 42 (right hand picture) is where a night light can be plugged in for writing/reading messages.
5 - Wavemeter Schematic
6 - Receiver - Note 54 which is a watch
7 - The Main Station. Receiver left, transmitter centre and battery right
8 - 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 station.