ORIGINAL MESSAGE:
On Sat, 8 Aug 2009 22:59:20 -0500, "Gary Schafer" <garyschafer@comcast.net>
wrote:
>
>What happens on 160 meters and even 80 meters with a choke that is "too
>small" for the frequency involved is that it is operated in a parallel
>resonant mode with the plate tuning capacitor in order to provide a high
>enough impedance.
REPLY:
A "too small" choke is indeed in parallel with the tune cap, but it had better
not be *resonant* with it or fireworks will follow. The relatively low reactance
of the "too small" choke is compensated by increasing the value of the tune
capacitor, but that is not resonance, just the normal way opposite reactances in
parallel combine in a non-resonant manner.
Resonance is where XsubL = XsubC, and that is not the case here, far from it.
73, Bill W6WRT
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