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Old May 23rd 07, 06:23 AM posted to rec.radio.amateur.homebrew
Jack Schmidling Jack Schmidling is offline
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First recorded activity by RadioBanter: Sep 2006
Posts: 94
Default Self Osc Problem

I am building an exciter for my 8000 rig. 6AG7 VFO, 6CL6 buffer and 807
final.

I am plagued with the problem that resonance in the final does not agree
with peak power out.

The power peak (watt meter or light bulb) is a considerable twist south
of the plate current dip.

Looking at the output on a scope shows nothing strange about the wave
shape as the amplitude increases beyond the dip.

I have tried neutralizing with coupled links between the input and
output tanks but it makes no difference nor does anything else I have tried.

Any ideas would be welcome.

Jack K9ACT


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