Hi Carl,
There was a discussion on the group sometime back about this topic.
Take a look in the archives?
The formulas typically shown in the old books for Pi-nets are an
approximation, that is close enough for amateur radio, as long as the
transformation ratio is fairly high. They are unuseable for a 50 ohm -
50 ohm, or therabouts, calculation...
73 & Good evening,
Marv WC6W
On Thu, 21 Nov 2002 20:40:19 -0500 "carl seyresdahl"
<carlseye@tampabay.rr.com> writes:
> I have searched and Researched articles on "design of pi-networks"
> and
> have noted one thing which seems to be a common thread. IE: they
> seem to all
> pertain to "plate to antenna " situations.. In other words, Hi
> impedance to
> low impedance levels, such as final amplifiers or linear amps.
> outputs...
> there seems to be little to nothing about "input cicuits" as it
> pertains
> to "exciters to amps" input ckts. IE: 50 ohms to lower impedance
> levels..
> There are of course some "charts" in past years of the "handbook"
> but are
> they relevant to today's needs??
> Just wondering !!!!
> carl / kz5ca
>
>
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