CTC 5 Low high voltage

[miniman82]

Run through the horizontal section alignment procedure in Sams, that usually clears up some problems. If frequency is on point, you have good B+ to the plate cap on the horizontal output tube, the HV rectifier is good in another set (don't trust the tube tester on this one) and the fuse isn't blown, you might be looking for a new flyback.

Pull the shunt reg cap off the 6BK4 and disconnect the HV anode wire to the CRT. Still low? The problem is in the chassis. FWIW though, no CTC-5 I've ever seen had good HV. Mine maxes out at 21kv, and I modded the chassis with pots to control shunt tube grid bias and horizontal drive.