1950s or '60s vintage Zenith TVs, Need some info

[Electronic M]

Originally Posted by vortalexfan

OK so here's a picture of the burned up capacitor, has anyone seen a capacitor fail like this before, especially one that's only a couple years old?

You probably ruined it when you salvaged it...the plastic sides and dielectric/foil roll melt easily. If you accidentally touched your iron to the side of the cap and melted it a bit you could have shorted together the 2 capacitor metalized plastic plates, or damaged the dielectric enough to make failure easier.

I've ruined a few yellow caps with my iron myself....I don't like that they can melt easily so I only use them if I'm restuff paper caps or dealing with a situation where I need extra long leads and I don't want to Western Union splice longer leads on.

[vortalexfan]

Originally Posted by Electronic M

You probably ruined it when you salvaged it...the plastic sides and dielectric/foil roll melt easily. If you accidentally touched your iron to the side of the cap and melted it a bit you could have shorted together the 2 capacitor metalized plastic plates, or damaged the dielectric enough to make failure easier.

I've ruined a few yellow caps with my iron myself....I don't like that they can melt easily so I only use them if I'm restuff paper caps or dealing with a situation where I need extra long leads and I don't want to Western Union splice longer leads on.

Well I had replaced the burned up one with another one and for some reason the picture tube is glowing a purplish color inside the neck near the socket, and I'm not getting any picture on the screen.

[Yamamaya42]

Originally Posted by vortalexfan

Well I had replaced the burned up one with another one and for some reason the picture tube is glowing a purplish color inside the neck near the socket, and I'm not getting any picture on the screen.

NOT GOOD

that means the CRT is gassy. like seen here
https://www.flickr.com/photos/70039806@N00/5379156237/

Running it with a bad tube like that can cause all sorts of nasty feedback problems.

[vortalexfan]

Originally Posted by Yamamaya42

NOT GOOD

that means the CRT is gassy. like seen here
https://www.flickr.com/photos/70039806@N00/5379156237/

Running it with a bad tube like that can cause all sorts of nasty feedback problems.

What would of caused it to do that? Because it wasn't doing that before, the picture tube was running normally (no purplish glow) up until that capacitor failed.

[Yamamaya42]

Originally Posted by vortalexfan

What would of caused it to do that? Because it wasn't doing that before, the picture tube was running normally (no purplish glow) up until that capacitor failed.

you need re-check all voltages on the CRT, who knows what that did when the cap let go.

stick it on a CRT tester and see if it still has emissions.

is the HV still good, and not AC somehow.

for you to be seeing purple in the CRT elements, something is VERY wrong, and usually that is a tip off of air have gotten in there somehow.

[vortalexfan]

Originally Posted by Yamamaya42

you need re-check all voltages on the CRT, who knows what that did when the cap let go.

stick it on a CRT tester and see if it still has emissions.

is the HV still good, and not AC somehow.

for you to be seeing purple in the CRT elements, something is VERY wrong, and usually that is a tip off of air have gotten in there somehow.

I don't have a CRT tester, I do have a Knight tube tester that can be used to test CRTs but I don't have the special adaptors to convert the Knight tube tester into a CRT checker.