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@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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