Tube ID

[Electronic M]

I'd change caps C2 77, 78, and C80. Especially C2. Check R6, 76 and R77 too.
Paper caps short or develop excessive DC leakage current and can absolutely kill vertical oscillation and coupling to the output...you already saw what the CRT grid coupling cap leaking did to mess up brightness bias on the CRT...If the osc or output gets mis biased from cap failure leakage current the osc can stop dead or the output can have it's signal cut off.

Any section that has original caps you should expect to find dead and be surprised if it still works.

[timmy]

Ok I'm going to recap the whole set and hope for the best at this point . there are to many old caps to dance around. I'll post the outcome when it happens. Thanks tom for the tech info.

[timmy]

Does anyone know of another company like moyers that sells capacitors, moyers may not be open this coming week and I need capacitors. Maybe a name and phone number someone good that someone here had used befor. Thanks

[Tim]

Sal's Capacitors. Great to deal with and fast shipping. http://www.tuberadios.com/capacitors/ Contact info at bottom of page.

[timmy]

Does anyone know how to figure out the date code of a ge crt . The sticker shows code 6113 then under 188 is 50 and another number. A 103227

[Tim]

I vote for the 13th week of 1961 188 is the EIA code for GE. I think the A103227 is the serial number.

[Electronic M]

I've done good with mouser and digikeys websites for caps, resistors, diodes, terminal strips, etc.

Gotta, tick the filter by in stock box, and play with some of the filters to find what you need, but the price is usually better than more specialized vendors.

[timmy]

On a 21fjp22 crt , I'm trying to figure out what year this tube was rebuilt. It shows the word code and under that is the number one next to that is 82 then next to that is 9 . Would that be January 9 1982 ?

[timmy]

Ok so it's all recapped and still no verticle, I checked resistors around the vert oscillator tube and a lot of other places for the verticle and they are within range and also double checked the hold , height, linerety, pots all are good. I find that the vert oscillator tube is not oscillating because when I probe number one of that tube with my meter on ohms the screen wants to open so I'm at a loss as to why I can't get this to oscillate. I don't have a voltage chart for this set to check voltages.

[JohnCT]

Many years ago I ran into an RCA TV that had a vert osc that wouldn't run. The vert hold control read fine out of circuit, but I missed the part where it had about 100K ohm leakage through the case of the control to ground. When I lifted the vertical hold control off the chassis and let it float in the air, the vertical came back.

Long shot to be sure; in 50 years in consumer electronics I only saw this once.

John

[timmy]

Ok well now it's confusing, I got the SAMs for this set and it shows the sync phase inv tube to be a 6u8 but the tube lineup on the paper that came with the set shows a 12bh7 so weather this has anything to do with the verticle not working I don't know. If I try the 6u8 it may burn out but at the same time I don't want to burn up anything else by trying this tube.

[Electronic M]

There were 2 different Sam's for the model number you gave (I listed them I the initial post I made with schematic pictures) and the different Sam's had different tube compliments.

I should pull the two Sam's out later and see if either shows that tube...

[timmy]

Just for the heck of it, can 3 non polarized 100 volt capacitors be put in the series config to make a non polar 300 volt cap.

[JohnCT]

Originally Posted by timmy

Just for the heck of it, can 3 non polarized 100 volt capacitors be put in the series config to make a non polar 300 volt cap.

Yes, not forgetting that they still follow the same rule of adding voltage but losing value in series. If the running voltage of the circuit is close to the total voltage of the caps, you might want to add some high value resistors across the caps to equalize the voltage across them so one cap doesn't approach the voltage limit.

John

[timmy]

Ok well I'll just put 2- 200volt 47uf caps together neg to neg and use the positives for the connections to make a 400 volt 24 uf non polar cap.