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Assembled Forty-9er 3W HAM Radio QRP CW Shortwave Radio Transmitter Receive. There sidetone launch. Transmit power: 3W @ 12V. Transceiver Distance: 100-300 km. 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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