Motorola TS-9B Horizontal Issue

[StellarTV]

Originally Posted by old_coot88

When he did the '7 seconds off' test, the pic came in good at turn-on, stayed good briefly before the bars drifted back in.
Seems like if the fault were caused by a component other than a tube, the bars should be there instantly at turn-on.
Best WAG would be a gassy H out tube, 'specially since the width is affected also.

I honestly can't remember ever seeing a problem caused by a weak damper. All damper faults were either arcing or an open heater.

Originally Posted by Username1

In the damper circuit, the doide is suppose to stop oscillations in the flyback after
the conduction pulse turns off the hv output tube.... So I would say your problem
lays in the damper circuit, possibly a cap in the cathode to ground area.... Or the tube
itself.... ? Odd I would think oscillations in something near the horiz deflection circuit
would effect the linearity of the lines.... But it seems to effect the brightness of the
lines.... Maybe the problem lay off the damper circuit feeding the blanking circuit....?

Okay, I've changed the H-out, damper and oscillator tubes with no improvement. The 'squeeze' is also affecting horizontal linearity, like a ripple, but takes a close look to see it. When something moves across the screen I can really tell. You are confirming my suspicion that this is a damper-related defect. Going to try seeing if there are any micas or ceramics around the damper... ETV has the TS9B print on their web site so I'll take a peek prior.

Wonder what happened to
that Toad soap....? I can't believe it didn't catch on....

Apparently $1.99 for a box of Toad on sale was still a bit much for a detergent that left your clothes fresh as a swamp lilly.