BP-3 Polish WWII Spy Radio Set
|The BP-3 was a valve-based spy radio transceiver, developed during WWII by Tadeusz Heftman of the Polish Military Wireless Unit (Polski Wojskowy Warsztat Radiowy) in Stanmore (UK) . It was introduced in 1943 and was intended for use by Agents and Resistance Organisations in Europe.|
The BP-3 measures just 28 x 21 x 9.5 cm and weights no more than 4 kg. It uses a long wire or dipole antenna and comes with a set of accessories, such as power cables, crystals, antenna and counterpoise wires, external morse key, a mains power supply unit (PSU) and a 12V DC converter. The transmitter produces an output power of 50 Watts in CW, which is more than its much larger and havier British counterpart the B2. Apart from the Polish Resistance in occupied Europe, the BP-3 was also used by the SOE (both in Europe and Asia), and the French, Czech and Yugoslavian Resistance. For a long time, the Polish spy radio sets were superior to their British counterparts. The BP-3 was followed by theBP-4, which had a different frequency range (4-16MHz) and finally in 1944 by the BP-5, which covered the same 2-8 MHz but had a built-in AM (voice) modulator.
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