Phil Clements wrote:
> If one wants to depart from the traditional Pi input network a parallel
> L/C configuration can be utilized. A tapped fixed inductor from the
> cathode(s) to ground, shunted by 300 pf Arco trimmers for each band. This
> seems to cover all bases, is easy to construct, install, and tune. This is
> the scheme utilized in the Alpha 77 series amps that results in a clean
> signal and a happy exciter.
This would work fine when the input Z is near 50 Ohms (which most are).
I think you would need a lot more than 300 pf to get the proper Q on
the lower bands.
73, Roger
--
Remember the USS Liberty (AGTR-5)
http://ussliberty.org/
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