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Duxford Radio Society


Imperial War Museum, Duxford, England 



Conserved Equipment Details


 


"B2" British SOE Transmitter Receiver Type 3 MKII

 b2
The classic "B2" suitcase set as used by British SOE Agents in the field
B2 in parachute drop cases type G and H
The "B2" station in waterproof parachute drop containers type G & H  as supplied to  Resistance Groups
 

"B2" British SOE Type 3 MKII (1942)

The Special Operations Executive (SOE) portable transmitter receiver station Type 3 MKII was designed for radio communications by British Agents and Resistance Groups in German occupied Europe over distances of 800km or greater.

It was designed by Major John Brown (who was also the founder of the Duxford Radio Society) as a replacement for the previous model suitcase set, the Type 3 MKI equipment.

one of a long line of covert radio sets Wireless Sets C12 was designed
between 1948 and 1950 as a private venture by Pye Ltd to replace the Wireless Sets No. 19 but was not initially adopted by the British Army because of plans to implement the Larkspur series of equipments.

However, in 1955 it was adopted by the British Army as a temporary substitute for Station Radio C13 (the official Larkspur replacement for WS19) in armoured fighting vehicles, when the C13 development program ran late. The equipment then remained in service until the middle 1960s and was manufactured for Pye Ltd by Garrett Engineering, Leiston, Suffolk, UK.

The equipment is constructed along similar lines to WS62 and has the same overall external dimensions as WS19.  It consists of a main transceiver unit, a separate power supply unit and an external aerial tuning unit.  The equipment can be connected to either WS19 or Larkspur control harnesses.

The frequency range covered is 1.6 to 10.0 MHz, and the equipment provides two channel "flick" tuning operation by means of switched main tuning capacitors, each with its own colour coded dial mechanism.  The ATU has twin tuning inductors switched by relays under control of the radio unit. Transmit power out is 3 - 5 Watts AM at 95% modulation and 4 - 8 Watts output on CW. The equipment is intended to work into vertical rod aerials of length between 8 and 32 feet, but will also operate into a 100 foot wire.

DRS is fortunate to have several types of the B2 equipment.

sThis individual W.S. C12, Catalogue No.
ZA43050, is in near as-new condition and does not appear to have seen active service duty.  The main unit is serial number 2418 dated 1955, and carries the legend NEW 7/63, which is taken to indicate the date of modification or overhaul by the REME Newark Depot.

The matching aerial tuning unit ATU No. 5 for W.S. C12, Catalogue No. ZA43051, is serial number  2363.

The PSU (24V) for W.S. C12, Catalogue No. ZA43064, is serial number 2362, dated 1955.
A long with the Wireless Set 62, this set was donated to DRS by the Royal Engineers Museum, Chattenden Barracks, Kent, when the museum at that establishment closed.

Due to the excellent condition of this equipment when received, conservation work has been limited to general cleaning, plus dismantling and re-greasing the bearings of the rotary transformer.

The equipment is currently in full working condition.
B2 parachute drop cases type G & H 
B2 waterproof parachute cases 
B2 Parachute drop cases G & H

B2 station in cases G & H open 
B2 PSU module with case removed 


B2 receiver module 
B2 receiver module with case removed 

B2 transmitter module 
B2 TX module with case removed 


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