[TowerTalk] TL-922 grid chokes

[Todd Coulter]

There is lots of good information on this site. Take a look.
 
http://www.somis.org/
 
 
                      73's
                     Todd
                    N4JRZ

--- On Thu, 8/5/10, Jim Thomson <jim.thom at telus.net> wrote:


From: Jim Thomson <jim.thom at telus.net>
Subject: [TowerTalk] TL-922 grid chokes
To: towertalk at contesting.com
Date: Thursday, August 5, 2010, 10:45 AM


Date: Wed, 4 Aug 2010 10:34:40 -0500
From: rcm at mail.icnet.net (Randall Mullinax)
Subject: [Amps] TL-922 grid chokes

The grid chokes in my TL-922 were replaced with 10 ohm resistors 
by the previous owner.  The amp works fine except on 10 M where the 
resistors go up in smoke within a few seconds.

This bring up several questions.

1. Is the amplifier oscillating on 10 M?

2. Should I replace the resistors with the factory 470 uH chokes 
or directly ground the grids?

3. Where can I get replacement grid chokes?

4. I?ve read about adding/increasing negative feedback.  Does anyone 
have suggestions?

Thanks for any and all comments.

Randy
AD5RM