R4. Czechoslovak military HF receiver.
5:08
YouTubescocolopez
R4. Czechoslovak military HF receiver.
The R4 is a superheterodyne receiver, developed since the late 40s to mid-50s for the Czechoslovak People's Army. Produced by Tesla. It has a coverage of 1.5 to 12.5 MHz in five ranges and works in the modes A1 (CW), A2 (SSB) and A3 (AM). It is a very sensitive receiver and adjustable. It has problems with reception in SSB. Good performance and ...
22.2K viewsAug 26, 2010
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