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Re: [Amps] TL922A recommended mods?

Subject: Re: [Amps] TL922A recommended mods?
From: "Jim W7RY" <jimw7ry@gmail.com>
Reply-to: Jim W7RY <jimw7ry@gmail.com>
Date: Tue, 14 Aug 2012 17:26:59 -0700
List-post: <amps@contesting.com">mailto:amps@contesting.com>
See pictures here of the TL-922 QSK and step start modification:

http://s900.photobucket.com/albums/ac206/w7ry/QSK%20Modifications%20to%20my%20TL-922/

73
Jim W7RY




From: Jim W7RY 
Sent: Tuesday, August 14, 2012 8:48 AM
To: Jim Garland 
Cc: amps@contesting.com 
Subject: Re: [Amps] TL922A recommended mods?

I offer a circuit board for this. But includes a bias switching system as well.

The sb 200 sb 220 and drake l4b will be ready shortly.  See my qrz.com callsign 
for details.


73

Jim w7ry

On Aug 14, 2012 8:36 AM, "Jim Garland" <4cx250b@muohio.edu> wrote:

  A friend has a recently acquired lightly used TL-922A that is unmodified and
  works perfectly on all bands. He has asked me to replace the clunky T/R
  relay with a quieter & faster vacuum relay, and also to install a solid
  state relay to take the burden off the power switch.  I'm not familiar with
  this amplifier, but from looking at on-line postings it appears to be an
  amplifier that owner's can't keep their hands out of! I've never seen such a
  hodge-podge of proposed modifications, some of which strike me as bizarre,
  others of which purport to improve on the original design, but which appear
  to be mostly preventative maintenance rather than solutions to actual
  problems. Still other mods probably work just fine, but are hard to install
  and require complicated circuitry.  So, my question is whether anyone can
  recommend a simple way to swap out the noisy antenna relay and take the
  burden off the main power switch? I'm particularly interested in the
  mechanical layout, routing of wires, etc.  I've not looked inside the
  amplifier yet, but from photos it appears to be rather difficult to work on.


  Thanks!

  Jim W8ZR

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