Rca ctc-5

[miniman82]

Originally Posted by DaveWM

I disconnected my shunt and the HV shot up to 25kv with a MUCH brighter screen, still holding at 180ma... So I will mess with the HV setup and regulation tomorrow.

I just realized there is no HV pot, so I will start with some tube swapping on the 6BK4

really? You must have the one chassis the was built right then, none I have ever seen made more than about 22kv. You can copy the circuit from any of the later sets to add the HV adjust pot, then you should see some improvement in brightness. Set it so the chassis puts out around 23kv with a blank raster, see if that does the trick.

Tube swapping the 6BK4 won't help, you need to change the tube bias with the HV pot.