Quote:
Originally Posted by Electronic M
Two things I highly recommend doing on a CTC-5: installing CTC-7 HV control pot circuit and installing CTC-7 contrast/brightness circuit.
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I restored a CTC5 Whitby a decade ago. One issue was low high voltage. It would minimally make about 21kV. The shunt regulator drew next to no current.
I discussed this on the forum and it seems a common problem. I could not find anything amiss in the horizontal seep circuit. To help boost the HV to get it to the point the 6BK4 would do its job, I substituted for the HV rectifier a solid state plug in replacement.They regularly pop up on eBay.
I had problems with maintaining vertical sweep linearity and ended up replacing all the capacitors and many of tyhe resistors in the vertical sweep circuit.