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Re: [TenTec] Testing Argosy final amp current

To: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Subject: Re: [TenTec] Testing Argosy final amp current
From: John <jh.graves@verizon.net>
Reply-to: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Date: Sun, 26 Feb 2012 21:09:27 -0500
List-post: <tentec@contesting.com">mailto:tentec@contesting.com>
Scott, Dave, And Ed,

Thank you for the answers.  the rig is an original Argosy S/N 00042 and 
I don't know what, if any,  mods have been done to the rig.

I did misread the instructions for the front panel drive settings.  It 
was one of those things done with the rig open on the desk and the 
manual in the lap.  It seemed funny, which is why I asked the question.  
Of course, when I went back and re-read the the manual, it says CCW.

I don't don't think you have to disconnect the power lead (gray) to the 
driver pair to test the final pair.  The red lead is the source of all 
power, at the very least, to that part of the board, and the gray lead 
is in a terminal next to and connected the the end connection of the red 
lead and goes to the driver pair..  That is still a good question and I 
might call tomorrow and ask the question just to be sure.

The final is now set and I see 135 -140 ma current with zero drive and 
key down (locked).    I have seen a few remarks that 125 ma may not be 
enough to keep the final from dropping to Class C when pushed.  The 
remarks were for the Argosy but I don't think it was absolutely clear 
which model/version was under discussion.

Dave, I was able to unscrew the back panel and pull the panel back far 
enough to make the measurements.  If I had to do anything else, it would 
require unsoldering most of the leads both to the final board and all 
the connections to the rear panel as well.  I did cut the red wire and 
will solder it together and cover it with a small length of heat shrink 
tubing when all is done.

I am hoping that I don't need them but ASI? lists a replacement for the 
MRF 477's.  I believe it was Mike Bryce who said they are not as rugged 
as the originals.

Thanks again to all who have answered my questions and pointed me in the 
right direction.

73,  John / WA1JG

John / WA1JG

On 2/26/2012 9:56 AM, Scott Sheppard wrote:
> John
> Just re-read your post...the drive should be set all the way CCW counter 
> clockwise (essentially off to the left)...the radio in the LOCK pos...that 
> should be where you take the readings from...
> scott
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