Rca CTC-25 overview and help

[Electronic M]

If it is the filament lead/winding that has arced through check the wire's resistance before replacing it. If it is resistance wire it will be more of a task replacing it correctly.

If it is the HV lead that has failed or a non-resistive HV rect filament winding there are a few ways to go...All of them involve getting/installing new HV wire. There are probably vendors online that stock wire with 40KV rated insulation. Non-resistive spark plug wire from an auto parts store may work. I tend to just steal and reuse the HV leads from 1980's and newer CRT sets that folks abandon at the curb. The last option is the only one that comes with a HV connector on the end of the wire. The first two options require you to remove and reuse the existing CRT HV connector from the old wire if replacing the original HV lead to the CRT.