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ok, just made some HV measures. This is on a ctc38, there is no HV adjustment on this set, its all off eff. coil. Anode voltage is 20 KV, specs: 25KV +/- 2 KV. So thats incorrect, however, focus reads 5 KV. No specs for focus, but almost all of them are 5 KV. I am scared to adjust the efficiancy coil as they always break apart on rca sets when they get old. Basically, my eff. coil is the only thing I can adjust to correct hv problems. The tubes were tested about a year ago and they were all ok. This problem did exist then too, so Im going to rule out tubes. If I had a huge stock of eff. coils I would be in great shape. My advice: Dont adjust an rca eff. coil unless you must! Even in the zeniths! The pastic spool heats up from the current in the coil and deteriorates those too. Ive had all of them crack to peices!
Thanks
Doug
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