Forty-9er 3W Amateurfunk QRP Kit CW Kurzwellenradio Sender Empfänger Telegraph
11,05 €
2, increasing the side tone circuit, so that when you operate the transmitter, the headset can also listen to the keying signal, side tone circuit using an audio sine wave generator, the effect was significantly better than the ordinary sense of hearing frogs square wave generator.
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