PA0O ham radio

again a page full continuous decodes of WE6XGR  Sunday morning. only 1 time decoded   partly  WE2XGR/2  in FN31LS weak signals  -17dB  as best only  Overall propagation weak.  In the WAERTTY  low activity 0148 -25  1.8   0.499500  0 WE6XGR FN12 50 0154 -27  2.4   0.499450  0 <...> FN31LS 47 0204 -25  1.8   0.499500  0 WE6XGR FN12 50 testing my QTX  500kHz  I have used that one before at 502.4 kHz in 2010 The first power on the 6.3A fuse was blown. Already lost 2 IRF540 while testing the output on a dummy load trying to tune down to 475 kHz  gave high currents and lost the IRF540 at 500 it seems  to work okay. If  I can believe my power meter the output is well over 100W at 6A 24V input  never had that much output from this simple but genius design. But the IRF540 can not handle this level and breaks down after 10seconds ...

The  QTX  designed by Ron GW3UEP   can give 100W output at very high efficiency  but you have to tune L3 for maximum output. Untuned  the output can be less then half of maximum. Tuning is very easy using a ferrite bar. i use the IRF540   and  the IRL540  the last one is an improved version it gave about 5% higher output. Amazing performance  this MW QTX   n > 90%  imagine  a high power PA with such performance.  1000W out would be 1800W  with same input ... Only non linear modes   and low bands  helas.. http://groups.google.com/group/uk500khz/web/gw3uep-cw-tx  received often in 2010 http://www.qsl.net/pa0oos/VX9MRC 500kc/vx9mrc_500_18jan.mp3