1979 GTE Sylvania GT Matic CX9164W chassis E24-3

[pac.attack76]

Just got this set in a lot of 4. This one was a huge mess. Got it cleaned up but the plug is cut off at the end of the cord which isn't a problem but I'm hesitant on testing till I know more about the flyback on it. There is a small bulge on top with some cracking and one edge is warped a little. Will it hurt to try or should I replace that 1st? I've circled the areas.

[zeno]

You gotta work on the pix sizing ! Dont feel bad, I wouldnt know how to
do it either !! I would ask my sons but I would forget in a few days.
Anyhows
It looks like an in line jug. Thats good as the earlier GT matic / Super Set
deltas had a VERY short life. If it were me I would just fire it
up with a variac. You need to confirm the CRT is good BEFORE you
put time & $$$ into it. Post some sized pix of the area also first. All
I can see is what looks like a chunk out of the FBT.

73 Zeno
LFOD !

[pac.attack76]

I know. I never had trouble till now. Not sure what's going on but I'll getting better ones.

[pac.attack76]

Ok, I think I got it. Phone has a resizing option but I never had to use it.

[zeno]

The small thing in the first pix looks like a spark gap. 2nd pix
looks like a tripler that is cracked open & NFG. Dont run it.
After the week end I will see if I have a manual & give more info.

Zeno

[pac.attack76]

Originally Posted by zeno

The small thing in the first pix looks like a spark gap. 2nd pix
looks like a tripler that is cracked open & NFG. Dont run it.
After the week end I will see if I have a manual & give more info.

Zeno

Ok, I'll wait 👍

[radiotvnut]

Those were made from about '75 until '80, when they were replaced by the E32 single-board chassis with an IHVT.

On your set, triplers were a high-failure part, as well as the filter capacitor and bad solder connections. I ran into a few bad yokes and a number of weak tubes on these. When they're right, they have a nice picture. I think the tripler on these is an NTE523A.

[pac.attack76]

Originally Posted by radiotvnut

Those were made from about '75 until '80, when they were replaced by the E32 single-board chassis with an IHVT.

On your set, triplers were a high-failure part, as well as the filter capacitor and bad solder connections. I ran into a few bad yokes and a number of weak tubes on these. When they're right, they have a nice picture. I think the tripler on these is an NTE523A.

Looks like it. $25. I'll try to order that soon.

[pac.attack76]

Also, what is the filter cap on this? May as well replace with the tripler.

[pac.attack76]

New tripler arrived today. Will put in today or tomorrow and update.

[pac.attack76]

Put new tripler in and tested. Red breaker on back popped out tripped where do I look now?

[JohnCT]

Originally Posted by pac.attack76

Put new tripler in and tested. Red breaker on back popped out tripped where do I look now?

Did you check the horiz output transistor for Collector to Emitter short? If the tripler is punctured it would have arced out and likely damaged the output and possibly the LV regulator.

John

[pac.attack76]

Originally Posted by JohnCT

Did you check the horiz output transistor for Collector to Emitter short? If the tripler is punctured it would have arced out and likely damaged the output and possibly the LV regulator.

John

No I didn't. Can u point those out to me?

[JohnCT]

Originally Posted by pac.attack76

No I didn't. Can u point those out to me?

The horiz output will be located on the right side of the chassis near the tripler. One of your pictures shows a metal TO-3 (top hat) transistor held to the side of the chassis near the yellow label with two 1/4" screws. If it's on the right side of the chassis, that's the output (if it's on the left, it's the reg). You can check from the metal body to the chassis ground side rail. It should read open (over 100K ohms). If it reads short (a few ohms or less), the transistor is shorted.

The low voltage regulator would be located on the left side looking from the back. That also might be a TO-3 metal transistor mounted like the horiz output is. That transistor won't be shorted to the ground panel but you can test it by removing it from the chassis and checking resistance between the metal body and the two terminals.

John

[pac.attack76]

Originally Posted by JohnCT

The horiz output will be located on the right side of the chassis near the tripler. One of your pictures shows a metal TO-3 (top hat) transistor held to the side of the chassis near the yellow label with two 1/4" screws. If it's on the right side of the chassis, that's the output (if it's on the left, it's the reg). You can check from the metal body to the chassis ground side rail. It should read open (over 100K ohms). If it reads short (a few ohms or less), the transistor is shorted.

The low voltage regulator would be located on the left side looking from the back. That also might be a TO-3 metal transistor mounted like the horiz output is. That transistor won't be shorted to the ground panel but you can test it by removing it from the chassis and checking resistance between the metal body and the two terminals.

John

Ok I'll check and let u know.