>> Hi Carey, flapper tuning is the best (maybe only) method for resonating a
>> strip line plate circuit.
>
> I think Carey said he was using the YU1AW 'lazy builder' circuit. That's
> not the usual resonant stripline with capacitive coupling design.
> Visualising it on Smith chart is the easiest way for me to think about
> how it works. Probably long before YU1AW, N1BUG built a 4CX1000 amp that
> way, with stripline instead of the lumped inductor YU1AW uses.
Yes, and it was tuned with a vacuum variable. The output coupling
was a flapper. I often regretted parting with that amp, as it was in
many respects better than what succeeded it.
73,
Paul N1BUG
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