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First off all the power this afternoon turned out
to be 250Watt output.
Maenwhile I completly rebuild the output coil and
switch of the transmitter, and now I'm able to
switch between 220W and 530 Watt output in six
steps.
Efficiency is around 80% at 60V supply
voltage.
I also did the ultimate test...running TX at full
power without antenna!
The very fast swr protection system did it's job.
(lucky me...)
If weather permits I'll be QRV again tomorrow
afternoon after 13utc.
Again around 136.30kHz.
Probably with a lot of tuning etc. And if possible
for 30 minutes or so in beacon mode.
Have to adjust swr circuit, so will work on that
tomorrow as well.
73
Dick, PA4VHF
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