Thursday afternoon
1: Could be the mounting screws to the board need to be tightened, they have
only an intermitent
ground connection (thermally).
2: Where you were playing with the wires; maybe the solder joints have
become (cold soldered)
and need to be heated up again and re-connected electrically sound.
It's a nice amp, wish I owned it.
Good luck, OM
Al Sirois, N1MHC/nnn0wna
East Boothbay, ME 04544-0002
n1mhc@arrl.net
===========
----- Original Message -----
From: <k0bx@arrl.net>
To: <tentec@contesting.com>
Cc: "Joe D." <k0bx@arrl.net>
Sent: Wednesday, July 08, 2009 2:34 PM
Subject: [TenTec] TT 422 Amp Filiment Transformer Problem?
>
> I got a Older TT-422 Amp a few months ago. Works fine and in good
> condition. Then one day I turned it on and nothing light up, that is, no
> panel lamps, it looked dead. As I looked around on the amp, I found that
> the 2 3-500Z's were on?
>
> Reading the manual, it seems that when the amp is turned on, voltage is
> applied to the filament transformer. From there, there are two output
> taps, one go's to the tubes and the other one go's to the QSK Board to
> provide voltage for the + 12 VDC Supply.
>
> This is where the problem is. There was no voltage at the connector to
> the QSK board. When I played around with the connector and the two wires
> coming from the filament transformer. The amp came to life. I figured
> the connector on the wires needed a good cleaning which I did.
>
> All worked for a few weeks. Then it happened again, no voltage to the +12
> supply. I left the amp on for a few minutes with only the filament
> voltage to the tubes on. Suddenly, the amp came on. I didn't do
> anything, I had not open the case.
>
> I suspect the filament transformer has an intermitent in the transformer
> tap that supplies the voltage to the +12 Volts supply.
>
> I wonder if anyone else has had a problem like this?? The TT-422 amp has
> been around for a longtime and anything that could go wrong has.
>
> Any help or comments.
>
> Joe K0BX
>
>
> Stop the insanity!
> Please do not add me to any distribution lists (Joke, Stories or Junk)
> without my permission.
> _______________________________________________
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>
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