Motorola ts907 low hv

[timmy]

Originally Posted by Username1

This is some kind of interference. A 4X multiple of the Horiz Osc. Perfect bars
like that are from some Osc, you can see they are perfect repeating not waving
or anything like that. What happens when you change the Horiz. Hold?
Is it always there? Does not look like a bad damper. If you got good Boost V.
Damper is most likely good. But with respect to the bars, On the outside, could
possibly be Heater-Cathode leakage, or short? Just a guess.....

Unfortunately, this might be a job for Mr. Oscilloscope.....

Some frequency getting into video? Does it remain or change
with Brightness, or Contrast change..?



.

nothing changes it’s just there bright contrast horizontal nothing changes I tested all tubes although I can’t trust a tester anymore this don’t make sense I made k1 and put it in and while checking voltages that when I noticed the tubes red and that’s what was on the screen so I since put the k1 back in the way it was and still got these lines and I tried both hot new ones.