1960s Sylvania Color TV Console Issues

[vortalexfan]

Originally Posted by Electronic M

Frequency is usually determined by RC time constants.... Double check that none of your caps are off by a power of 10 (easy mistake to make) then check for off tolerance resistors.

My D-16 behaved similar and one or two of the higher resistance vertical resistors were testing around double their rated value. Also make sure the tubes are healthy and the vertical lytics are new as either can cause vertical shrinkage.

Thanks for the tips, I replaced all of the coupling/Decoupling caps (film/mylar caps) in the vertical section and the vertical deflection is now working as it should.

But now I'm having issues with the color, I have no green at all in the picture, and tons of blue and not much red, I jiggled the service switch a little to check if that was the issue or not, and sure enough it did affect the color quite a bit and I also heard some electrical popping/snapping noises when I did jiggle the service switch. I had tested the picture tube about 2 months ago and the picture tube tested fine yet so could a defective service switch cause a loss of color in the TV or perhaps a defective color demod circuit (bad tubes or transistors?) I think one of the tubes in the Color Demod Circuit is a 6GH8 (which is one of the tubes that is notorious for going bad prematurely.)