1 STCK. 40-9ER 3W Radio Kit Cw Kurzwelle Radio Sender Empfänger Telegraph Gu
12,53 €
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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