Still Having RCA 8TS30 Issues

[Yamamaya42]

My set, the -100v tests at -86v and it changes when i adjust the focus, so I dont think your -81v is an issue.

http://suzaku.live-evil.org/0613242200a.mp4
Mine
it was the 6750 ohm part on mine that was replaced.

[Chris K]

Thanks everybody for the discussion. Couldn’t work on the tv today “new hot tub delivery!!!!) but I’ll be back on it tomorrow. My hunch as I’ve said is this just doesn’t look like an issue caused by a low but stable voltage. It seems more like intermittent noise although it’s not the tuner. We’ll find it just like my RA-103 that was on and off my bench for a year until you guys led me to the problem.

[Chris K]

Or I do have a 10K 7W I could parallel that would get me to 1300???

[jr_tech]

Originally Posted by Chris K

Or I do have a 10K 7W I could parallel that would get me to 1300???

Yes... 1304.

jr

[old_coot88]

On V124 (6AC7) horz osc. control tube, what voltages do you have on:

Pin 8 (plate) -- calls for 194 V
Pin 6 (G2 ----- calls for 105 V
Pin 5 (cathode)
Pin 4 (G1) ---- calls for 2 V negative

Cathode has 10 ohms to ground, so prob. not much there

[Chris K]

Originally Posted by old_coot88

On V124 (6AC7) horz osc. control tube, what voltages do you have on:

Pin 8 (plate) -- calls for 194 V
Pin 6 (G2 ----- calls for 105 V
Pin 5 (cathode)
Pin 4 (G1) ---- calls for 2 V negative

Cathode has 10 ohms to ground, so prob. not much there

Plate is 216 V
G2 is 86
G1 is -1.55
Cathode is...30 V DC?

[old_coot88]

30V on the cathode?! What is the resistance-to-ground from the cathode? Print calls for 10 ohms (R194).

[Chris K]

I'll check those voltages later today. I've lamented my inability to show via a video what this TV is doing but if you check out shango66 today, he's working on a Packard Bell color set with AGC issues and that TV is doing the exact thing mine is doing. I know this TV does not have an AGC circuit but maybe that narrows the issue down to a specific location. Not sure.

[Chris K]

Yes

[Yamamaya42]

you may wanna think about replacing the 10ohm resistor anyway, that 30v on the cathode is really weird!

[jr_tech]

Is your volt meter auto range and perhaps indicating 30 mili-volts rather than 30 volts?

jr

[Chris K]

No it’s 30 volts DC. Measured several times. My meter always puts a zero and a decimal and shows millivolts that way

[Chris K]

But let’s hold off on wasting brain power on speculation until I can re re recheck it

[jr_tech]

30 volts across a 10 ohm resistor would be 90 watts...resistor would be getting very hot!

jr

[Chris K]

When I measure it next, if I’m getting the same thing I’ll post some photos of the measurements and pins. That way if I’m doing something very stupid I won’t end up dragging u guys down any rabbit holes