GE Portacolor H4 chassis

[DaveWM]

got this today, CRT test good and tracks well so that is a major plus.

the B+ boost cap (.1 1kv) was open, the only other paper was a .047 that was across the B+ which was leaky. Both of these were the paper in a ceramic tube type caps.

There was also a burnt resistor, a 33k that goes from the 145 B+ to the cathode of the audio out, then 180 ohms to ground. Its forming a voltage divider at the cathode (145+,33k,cathode,180,ground) but not sure why its done that way. Anyway its smoked and now its replaced.

I did find a cathode short on that tube, and the video out and one other compactron. these were hard shorts that did not respond to banging the tube and the short indicator was pretty bright.

Before doing any work I did have a weak pic and some audio but I did not test it long.

I will replace the tubes tomorrow morning and see if that replacement 33k resistor gets too hot.

I don't do the automatic replacement of the filter and doubler caps, I will try it out and see how it works, check the B+, check for heat, look for evidence of cap failure in the pic and sound. If all good I will just leave them be. Its a string series set so I am not too worried about a filter cap taking out a transformer.