Bryan's Philco TV-123

[bgadow]

I've studied that socket very carefully; although I can't see anything out of place (and no corona/etc in the dark) I may just try subbing it. I should mention, there is a 4.7 ohm resistor in series with the filament and I've swapped it not once but twice.

The other day when I tested with a bulb I had all leads unhooked from that socket and just hooked up the bulb alone (it lit, with a little bit of "gassy" glow visible). Tonight I stuck the leads of the light in the socket (with tube removed) and it glowed purplish as HV came up, then went dark. Its filament never lit. What does it mean? As Pee Wee Herman once said, "I don't know!"