Glad to see you found the problem. Odd that it needed a resolder but I suppose that happens.
I need to take the time to check things more thoroughly but I have other projects that I need to sew up before getting back to that one.
Thanks,
Barry - N4BUQ
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----- Original Message -----
From: "Stephen" <stephen.nabet@...>
To: "tekscopes" <[email protected]>
Sent: Sunday, December 19, 2021 6:18:32 AM
Subject: Re: [TekScopes] Type 106
First of all, I¡¯d like to thank you for all your great ideas and suggestions:
Mark, Barry, Tom, Pete, Eric, Raymond, and all those that I probably
unintentionally forgot to mention.
I went back to the last thing I did ¡°before¡± I lost the output. And that was
changing D232. I reflowed the solder joints, but still nothing. Then, before
I used a power supply to substitute for the PT, I decided recheck all the
voltages coming out of the secondary, and the those after all the rectifiers on
the + and - sides (disconnected from the circuit). Everything was as they
should, albeit a bit high due the the line voltage I guess. Although the PT
primary is rated at 230V, and the manual even calls for testing up to 250V and
some change.
I then cleaned and resoldered D232, and bingo, traces are back up again.
While checking the tube voltages, I realized that most of the 10 and 33 ohm
resistors where way out of tolerance. One is is even at 45ohm instead of 33.
All of them will be changed, probably today.
I¡¯m gonna let the unit run for a couple of hours on the bench, and pray for
nothing else to give (again!!)
PS: Sorry if I don¡¯t always answer right away, but being in a different time
zone than most of you guys, Europe (Paris), and sometimes quite busy with
family, I¡¯m doing my best.
