[AMRadio] AM audio problem

Bob Macklin macklinbob at msn.com
Wed Dec 31 14:16:03 EST 2008

You really need to use a scope to trouble shoot this kind of problem.

Bob Macklin
Kent (Seattle), Wa,
"Real Radios Glow in the Dark"

----- Original Message ----- 
From: "Ed Sieb" <esieb at sympatico.ca>
To: <k5pgw at yahoo.com>; "Discussion of AM Radio in the Amateur Service"
<amradio at mailman.qth.net>
Sent: Wednesday, December 31, 2008 10:55 AM
Subject: RE: [AMRadio] AM audio problem

> Sounds like an ultrasonic oscillation.
> Some extra bypassing or extra  suppressor resistors in series with the
grids (or plate) of
> the first 12AX7 might be in order.
> Ed, VA3ES
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