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45-PK-1
Mk.I - Red Army HF monitoring receiver. 1.35…20 MHz in
five sub-bands, A1 / A3. Band switching by manual coil set
change like in National HRO. To the contrast with HRO, just
one RF stage and no crystal filter. Lower frequencies
(75...2000 kHz) were covered by a companion receiver, 45-PS.
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