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[AMPS] RF Chokes

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Subject: [AMPS] RF Chokes
From: (Peter Chadwick)
Date: Fri, 27 Mar 1998 09:26:08 -0000
Jon, KE9NA, says

>People might think the two choke approach is goofy, 
>but let me tell you, it works.

It's goofy enough that it's been used in a fair number of professional tx's
over the years - with success.

One variant I've seen that worked in a PA running a pair of paralleled
4-250A's and covering 1.6 to 22MHz continuous used a solenid abt 1 inch
diameter 3 inches ling wound with about #22, a 470pF high current ceramic
capacitor to ground, and a 2 section universal wound choke of abt 1mH, wound
on a 3/4 fibreglass tube, followed by a .01mFd ceramic cap to ground at the
B+ end.

By the way, the chokes were at right angles.


Peter G3RZP

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