The rig is designed for 80m and although very simple, it can give interesting results.
The two switched capacitors in series with the crystal are 1000pF and 40pF and, with the switch used as a T/R switch, give 600Hz offset. A PP3 9v battery is used to power the rig. Suitable transistors for the transmit portion (fig 1) would be BC107/BC108 etc for the crystal oscillator and an 2N3866/2N3053/BF51 etc in the 'PA'. The crystal is an 80m one - 3.560 mHz being the QRP activity channel. Figure 2 shows the receive side.
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