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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