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Re: [TenTec] Argosy 525

To: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Subject: Re: [TenTec] Argosy 525
From: John <jh.graves@verizon.net>
Reply-to: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Date: Fri, 17 Feb 2012 23:59:52 -0500
List-post: <tentec@contesting.com">mailto:tentec@contesting.com>

Thanks for the tip.  I also am facing a mechanical problem.  As you 
know, the PA and the SWR/Filter boards are vertically mounted in the 
back space.  My Argosy has an aluminum spacer-reinforcement that is 
bolted to both the back panel of the radio and the heat sink on the top 
of the radio.  That spacer, on my radio, is fastened to the back panel 
by  two sheet metal screws on the outside edges and and a bolt & nut 
with the nut centered on the spacer facing the front side of the 
radio.   There is hardly any of the bolt projecting past the nut.  When 
I turn the nut, the bolt also turns.  There is no apparent direct access 
to the bolt head, which prevents that spacer from being removed.  Did 
you or have you for any reason unbolted the heat sink?   That would 
appear to be the only other  easy way to access the two boards.  If you 
were able to unfasten the heat sink, are the leads long enough to drop 
that panel and check the final amplifier board and bias settings with 
the heat sink & final Amp board sitting on the bench?

John / WA1JG

On 2/17/2012 11:16 PM, scottsheppard@videotron.ca wrote:
> when I tuned up my Argosy a while ago I did it to spec...I kept getting 
> complaints of distorted audio, however...it took me forever (as it often 
> does) to find the bias was too low despite d=being what it called for in the 
> manual.
> Your problem may be simpler in nature and if it was working OK before, its 
> unlikely its your PA...that said, have a look if the simpler route does not 
> help. When I realized I had to exceed the current limit a bit I simply 
> listened in a separate receiver for clear audio...
> scott
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