mike kendall wrote:
I thought Ameritron was using PI-L networks vice PI networks? If
that is the case, doesn't a PI-L network have a more limited matching
range than a PI, but much better harmonic suppresion of course.
Inside the ham bands, I'm assuming that Ameritron would expect the
amp to run into at least a 3:1 VSWR. If not, why even use tubes and
just go solid state with the expectation your VSWR will be flat. R,
My comments about Q apply to PI-L networks as well. A 3:1 SWR
represents a very significant change in operating conditions for the
network. My guess is that there are many combinations of
resistance/reactance giving a 3:1 SWR that would result in excessive
circulating current in the coils and bandswitch of an AL-1500.
--
73,
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco
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