[Amps] MOSFET amp filtering - was: auto-tune

Ron Youvan ka4inm at gmail.com
Sun Dec 11 21:49:52 EST 2016


>> Not if the SS amplifier had an out impedance of one or five thousand
>> Ohms.

> But they don't. Typically a few ohms. You could step it up to a few
> thousand with a transformer and then run it through a pi network I
> suppose, but then you lose the advantage of SS amps: they are
> naturally broadbanded and don't require tuning, which a high-Q pi
> network does. Better, IMO, to just run the output through a low pass
> filter and avoid all tuning.

   I understand the original arrangement, but the output network of most
SS amplifiers especially push-pull amplifiers include an output
transformer that uses two brass tubes soldered together at one end and
the other ends are the output terminals, this secondary winding could
be adapted into a higher output impedance suitable for feeding a Pi
network/S.

   Feeding any SS amplifier through a "Pi" network was not my idea
but it is not automatically impossible.
-- 
   Ron  KA4INM - Youvan's corollary:
                 Every action results in unwanted side effects.


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