BFO esterno per ricevitori in onde corte sprovvisti di SSB. External BFO 455 KHz Beat Frequency Oscillator SSB CW Shortwave Radio. ( a richiesta 470, 467 KHz oppure 450 KHz). This circuit enables the decoding the side band transmissions on a normal AM receiver using 455 KHz IF ( Available also 470-467-450 KHz on request ).
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