frog wrote:
Hi, new guy on the block. If i may' I'd suggest trying to locate a crt
brightener and install it. Heater to cathode shorts are common and the
xfrmr that steps up the heater voltage will also act as an isolation
xfrmer. Also agree with the rejuvenator with short repair feature to
blow out the offending residue between elements.

Frog

Heater to cathode short would affect just one cathode, not all three
simultaneously.

John