[TenTec] Ten-Tec 422 Amp Problem

[K0BX]

thank you for  your input Jim.  But the TT 422 does not use a vacuum 
relay. 

It uses two fast relays.  It uses a driver transistor to drive the 
relays.  This transistor is located on the QSK board.

I was looking for someone that had the same problem and their fix.

I am going to call Paul at TT next week and either order a new QSK board 
or Relay board, which ever he suggest.

Thanks again Jim

Joe K0BX

Jim Brown K9YC wrote:

>On Thu, 27 May 2010 10:29:45 -0700 (PDT), k0bx at arrl.net wrote:
>
>  
>
>>I believe it is the QSK board but thought I would ask the group here before
>>I order a new board.
>>    
>>
>
>I dont know the 422, but I have a lot of experience with the 425. Based on 
>that, Id suspect either the vacuum relay or the smaller relay that drives 
>the vacuum relay. 
>
>There could, of course, be a failure on the QSK board. If its like the 425, 
>those boards are very easy to work on, and the transistors are all pretty 
>standard types that are easy to replace. 
>
>Vacuum relays are available from Gigavac. You need to know the part number. 
>Gigavac has a special discount for hams. The last time I bought (roughly 2 
>yrs ago), I paid about $75 each. Ten Tec has used several different relays, 
>so you need to know the part number of whats in your rig. Gigavac has 
>replacements for both. It takes about 90 minutes to change in a Titan if 
>youve never done it before. BTW -- Gigavac is whats used in current 
>production Alpha, and Alpha told me that theyve had very good experience 
>with them. 
>
>The vacuum relay is my strongest suspicion. 
>
>73,
>
>Jim K9YC
>
>
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