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Finland
Sweden
Spy radio
  
Kyynel →
  
Kyynel M-7
Spy radio receiver - this page is a stub

M-7 was a compact valve-based clandestine radio receiver, also known as a spy radio receiver, developed shortly before World War II by the Finnish Army Depot Company Munkkiniemi near Helsinki (Finland), and introduced in 1941. In was commonly used in combination with the Kyynel M-5 transmitter. The design of the receiver was later also used in the M-10 and M-11 radio sets.


Circuit diagram




References
  1. Louis Meulstee, Wireless for the Warrior, volume 4
    ISBN 0952063-36-0, September 2004.

  2. Antero Tanninen, Fjärrpatrullmännens radio 'Kyynel'
    Translated to Swedish and edited with permission of the author by Thomas ON6NT.
    Date unknown. Retrieved, September 2012.
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Crypto Museum. Created: Monday 22 June 2020. Last changed: Tuesday, 23 June 2020 - 06:41 CET.
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