Resistor or jumper at hv rectifer socket: Zenith 25mc30

[Electronic M]

I was able to find 3 used 6GH8s that test as good as new and a NOS 5GH8 (which should not mind an extra volt on the heater from a transformer powered set).
I'm trying to scare up some 6KT8s too...I found 3 that were less than great, but I've only searched a fraction of my unsorted stock of that era of tube so far.

[Tubejunke]

Originally Posted by Electronic M

I was able to find 3 used 6GH8s that test as good as new and a NOS 5GH8 (which should not mind an extra volt on the heater from a transformer powered set).
I'm trying to scare up some 6KT8s too...I found 3 that were less than great, but I've only searched a fraction of my unsorted stock of that era of tube so far.

Anything helps and thanks. Don't put yourself out too much searching through tubes. That 5GH8 may be what the set needs. Exactly right on the extra volt. It may be what the set needs right now as I continue to run on reduced line voltage to control HO cathode current. I am at about 110VAC right now. It seems to get a little better with time as do a lot of dormant electronics I have dealt with. You get past the initial phase of feeling good powering up without hot caps and transformers and then you can let a device sort of "reform" its self.

That term "reform" is probably what goes on really. A decades long dormant set gets playtime and the caps (if they made it that far) may sort of reform or rejuvenate themselves. Some people don't believe it, but I have seen it many many times. I heard these 60s color sets, particularly Zeniths' often come back from the dead like new. That's more or less what happened with mine. I put a new cap across the horizontal efficiency coil as I was installing it anyway and will likely replace the coupling caps in the same circuit. That's about it....