Hi I'm pleased to say that my BITX20 is now complete and it performs exactly as described. With my 132' doublet it has received excellent reports incuding 59 from PJ4 in one direction and UN7 in the other. Like Chris I made a few contacts with the penultimate (2N2218) stage on its own and these included an island off the coast of ES which was satisfying with 100Mw. At first the PA was a little unstable so I put in a small (abt 45pf) trimmer capacitor from the gate to the drain of the IRF510, lowered the value of the 2.2K resistor between the base and collector of the 2N2218 by putting a 1K resistor in parallel with it and substituted a 300pf cap for the 0.1mf between the drain of the IRF510 and the low pass filter. I now get 4 watts with a 12 volt power supply and 5 watts with about 13v from a 17 Ah storage battery. I heard VU2PEP wkg most of North America (with 200 watts) the other evening but the pile up was formidable. It would be nice to meet another BITX on the air. Is any one interested in taking one along to Rochdale on the 9th October? 72, 73 John G0UCP