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Re: [Amps] GU 74 operating parameters

To: Karl-Arne Markström <sm0aom@telia.com>, "Ulf Tjerneld" <star@frizon.org>, <Amps@contesting.com>
Subject: Re: [Amps] GU 74 operating parameters
From: "Jim Tonne" <tonne@comcast.net>
Date: Wed, 6 Jan 2010 14:09:47 -0500
List-post: <amps@contesting.com">mailto:amps@contesting.com>
Karl-Arne wrote in part:

> A PI-L network using a plate load impedance of  2800 ohms 
> and an
> intermediate impedance of 200 ohms would be a good 
> starting point.

Current in the PI and the L inductors will be
similar unless network Q is high.

Get PI-L designer here:
http://tonnesoftware.com/piel.html

Not only does design but also analysis including
both frequency-response plot (including return
loss) but also peak voltage across capacitors
and RMS current through inductors.

Its also on the ARRL HB CD if that is of interest.

- Jim W4ENE


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