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This small body-wearable receiver was built by the Russians during the
cold war. It was used to track down the clandestine (spy) stations of their
enemies and to intercept communication between foreign agents.
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It is curve-shaped so that it can be worn on the chest, concealed under
the clothing. At least three versions are known to exist, each with their own frequency range:
The receiver shown here is a model 1 that was used by the Stasi
(Secret Police) in the former DDR (East-Germany).
It was enhanced by the Germans with an extra amplifier to allow
secret communications to be intercepted at a greater distance.
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East-German Filin model-A
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At present, no further information or circuit diagram of this receiver
is available. You can help us by supplying addional information.
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