Dennis12Amplify@aol.com wrote:
I believe Chris is talking about converting from a PI network to a Pi-L
network. The Pi-L having two levels of impedance matching, and a little more
harmonic suppression, than the original Pi network.
Nope, he's talking about adding some inductance between the plate and the
tune-C, making a kind of "L-Pi" (or L-Pi-L!) network. The idea is that with
very high plate load impedances it may be impossible to get a low-enough minimum
capacity in the tune-C to permit a reasonably low Q. Adding some inductance
before the Pi network pre-transforms the load impedance to a lower value so a
practical capacitor can be used.
--
73,
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco
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