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Intermittent horizontal sync problems:
I really don't like when a TV I've already fixed breaks again, after having had it on for several hours yesterday, the horizontal sync started going in and out like someone was messing with the hold control. There's no more wax/paper caps in this, so my first thought was the horiz. osc tube, I took it out and tested it, it was a bit weak, so I put in another, and it worked (for about 20 min) and then went back to what it was doing before. Basically, if I let everything cool for a bit it works, but as soon as it is on for a while it looses horizontal sync again. I'm thinking the resistor inbetween the power supply and the horiz. osc coil is starting to burn out, I hope it's that one and not the one between the coil and the tube, because I have a replacement for that one already, but not the other. Anyway, I think this means that if I test the resistors, they should test ok, as the problem only comes as the set heats up, so I might just replace that one, let the set run and see what happens. If at that point it still does this, I'll already have it out and up on my bench, and I can check voltages while it is going, to try to locate the problem.
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