two 1950s GE sets in metal cabinets

[Adam]

I'm just replacing back the posts that got deleted ...

#7
09-05-2009, 05:34 PM

Adam
1965 Zenith

Join Date: Oct 2005
Location: Ann Arbor, MI
Posts: 1,287
I just finished the recap on the 14" set. These early circuit board sets are not the easiest to work on, but I managed it without any problems this time. I desoldered all the caps with wick before I pulled them out, and used a temperature adjustable soldering iron set at around 800. At least this set didn't have any metal cans soldered to the board, that's always the worst. The boards are in 2 parts screwed to the metal chassis, and by unscrewing them, it was possible to work on them by tilting them down without actually removing them.

I still have to check the tubes and other stuff before I try it out. The vertical output transformer doesn't look too good, but it checks out not open or totally shorted with the ohm meter.

I tried to post new chassis pics in the gallery, but kept getting some error message.

#8
09-05-2009, 06:36 PM
DaveWM
AK Member

Join Date: Feb 2009
Posts: 404
I just finished one of the 14" (actually still a part on the bench, need to install some feet on it). I am going to put a polarized plug, better than a 50/50 that way (still not 100% since there could be a miss wired outlet).

I did all the caps from the top as I did not feel like unscrewing the boards.

prob 6-7 wax caps IIRC.

It had some work done already (j hooks) so I did not feel the need to do a neat job.


no bad out of spec resistors. cut the cans off just past where the clamp holds them, restuffed. Put in a new fuseable resistor (old one was open).

I took the CRT out so I could test it with out having to reinstall the chassis all the time.

needed a couple tubes. After I learned about the importance of the ion trap position I got a nice clean picture. I am checking over a slight white line (vertical wide and very faint on dark pics) that I think I have licked after replacing a tested good HO tube with a NOS tube.

The plastic safty window is kinda messy, I would like to use a plastic polish to get some of the fine scratches out.