Motorola ts4j

[Electronic M]

Originally Posted by Bill Cahill

The high voltage caps coupling the circuits won't work right, either, if they are ceramic disc..
Those were originally .005 10 KV for vertical, and, .002 10 KV.
I may have my caps mixed up, but, I'm pretty sure on voltages on both. The cap on h. v. rectifier should be either .001, or, .005 at 10,000 volts.


I think they actually work at seven thousand volts.

Wrong. Every unrestored Moto VT-71 / VT-73 I've seen has 6KV rated HV caps, and the schematic linked above shows .001 on the H deflection plate couplings.

The HV coupling caps don't work well if ceramic (unless you increase the capacitance), but the only HV ceramics he says are in there are in the working Horizontal section....Add to that that it is a NO sync issue in the vertical (and not a sweep size/linearity issue, which is what HV cap issues would cause) and the HV caps should basically be irrelevant to the problem described.