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Re: [TenTec] Information Sharing: Curing a Corsair I Drift Problem

To: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Subject: Re: [TenTec] Information Sharing: Curing a Corsair I Drift Problem
From: "Mike, K9UW" <k9uw@wi-net.com>
Reply-to: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Date: Tue, 06 Dec 2011 19:02:07 -0600
List-post: <tentec@contesting.com">mailto:tentec@contesting.com>
Pete, there is an article in the September issue of QST called 
"Amplifier Care and Maintenance" (pages 33-37).  You can obtain a PDF 
from the ARRL web site if you're a member.

73, de Mike, K9UW
Amherst, WI

On 12/6/2011 4:57 PM, N6QW wrote:
> I am new to this list and did check the archives to see if perhaps this was 
> specifically covered by others.  While there were references to drift 
> correction in the Corsair's, I did not see this cure mentioned.
>
> Earlier this year I purchased a Corsair one that I would call in "medium" 
> shape and was generally pleased with the purchase save for the drift problem 
> that would take about 2 hours to finally stop drifting.  But it was the  the 
> drift in the first half hour that was a killer. Keeping the rig powered on 
> all of the time was not optimal. There are several manufacturers of "vfo 
> stabilizers" including rolling your own.
>
> I decided to try a product from the UK called the X-Lock 2 which will be 
> discontinued this month to make way for X-Lock 3. Now I can turn on the 
> Corsair and after about 2 seconds it will lock on frequency and stay there. 
> The kit price depends on the exchange rate but typically is around $40. I 
> have no affiliation with the company but have included a link on my website 
> so you can see how it was installed.
>
> 5 wires are used for the interface with two of those being power which is 
> tapped into the Corsair rear apron aux power. 2 connections for the coax that 
> samples the RF output and a 1 connection to the Offset pin on the PTO. There 
> is a tri color led that shows the lock / unlock status and that I simply 
> routed out the bottom of the Corsair Case and taped it to the bottom of the 
> case. The range of the Offset is somewhat less with this fix but I am happy 
> to forego a smaller range to gain the frequency stability. YMMV but I am only 
> sharing what I experienced.
>
> see: http://www.jessystems.com/X-Lock%20(rev%201).pdf
>
> The manufacturer is Cumbria Designs, Ron Taylor G4GXO  
> http://www.cumbriadesigns.co.uk/x-lock.htm
>
>
> 73's
> Pete N6QW
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>

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