55 Westinghouse 21" B&W

[Adam]

I re-capped the whole set, all the electrolytics and the wax/paper caps have been changed. That 4mfd cap was not part of my set originally. I also checked all the tubes and replaced the weak ones. I checked all the resistance readings at the tube pins in the vert sweep / deflection circuits and the only problem was corrected by changing that 3.9k. Pin 1 of the 6SN7 reads about 20k low, I am assuming this is due to that "several resistors and caps in one" component, but I think this shouldn't be causing my problem, as it would just have to do with the vert. sync pulses from the TV signal getting to the 6SN7 and not have to do with the vert. deflection? It sounds like you have the schematic, am I even thinking about this circuit correctly, I've been reading up on vert. circuits, if I'm correct the .1 mfd cap connected to the height control and then to the grid of the vert output tube is the one that is actually charging and discharging to produce the sawtooth wave? The height control controls the rate of charging, increasing the resistance from the power source (in this case the HO trans?) to that cap, increasing the charging time, the time which the electron beam is moving downwards (not in retrace), and therefore the vert size, and the 12BH7 is just an amplifier for the sawtooth wave, already created by the time it reaches its grid. I would think the problem would be between that .1mfd cap and the vert out trans. Changing the trans. did help, the picture was 'folded over' a bit at the bottom before. I don't think the yoke is bad either, next I'm going to try changing that 2.2meg resistor betwen that cap and ground. My meter really isn't sensitive enough to measure anything less than 1meg, I'll have to wait until the end of the week when I have time to go get one though.

I have to admit that tuner problem mystifies me, if the problem is in the tuner, and can be corrected at the antenna input, why would it show up as low voltage at the cathode of the 3rd IF tube and the voltage readings seem ok before that?

Anyway, I'm in Los Angeles, CA, actually I live in the valley, I just put LA because I figured everyone would know where that is.