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[TenTec] Argosy 525

To: <tentec@contesting.com>
Subject: [TenTec] Argosy 525
From: SSmith9831@aol.com (SSmith9831@aol.com)
Date: Mon, 22 Oct 2001 13:36:27 EDT
Hi-

Purchased an Argosy 525 at a local hamfest this weekend but found it might have 
a problem.

When I key the rig I hear a thumping sound that accompanies the sidetone.  It 
is very noticeable when wearing headphones like it is overdriving the phones 
but I dont think that is the problem. When the dirve knob is turned down to 
zero the thumping disappears or is very muted and it increases in volume as the 
drive knob is advanced.

I am thinking that it is one of the switching transistors or FETs thats gone 
bad. 

Anyone have any thoughts as to what components I might check or possible 
solutions?

Also the sidetone is sort of hard sounding and I remember someone mentioning in 
an earlier posting that some of the early Ten Tecs generated a square wave 
sidtone.  Is there a modification out there to smooth or soften the sidetone?





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