This beacon puts out about 0.5W on 10.140MHz. It is intended to be used for Slow Morse (QRSS) operation.
The actual design is by Colin G6AVK and PCB by 9H1LO.
The varicap is a normal 3mm red LED. Transistors can be 2N2222 or 2N3904, PA final 2N3866 or 2N4427.
This is the SSB exciter used in the 17m 9H1LO/B PSK31 (USB) beacon.