Admiral 14R12 Restoration

[old_coot88]

It's very unlikely that this problem is related to the yoke (if it was, you wouldn't have gotten that healthy arc off the 1B3 connector).

More likely there's a leakage path from the HV source to ground that's lugging down the HV.

First try disconnecting the anode connector from the CRT. Does the HV come up any? If not, then the leakage path is from the 1B3 socket area to ground (and is probably the source of that arcing you heard).

What is the highest Resistance (ohms) range on your multimeter? If it'll go to 20 megohms or higher, try measuring from the 1B3 filament winding to ground. It should show infinite resistance (open circuit). Any indication at all would indicate leakage sufficient to drag down the HV.

Sometimes the insulation on the 1B3 filament winding will break down and arc through to the flyback frame. (The filament winding is one or two turns of thick wire wrapped onto the frame). Or possibly a leakage path has developed in one of the 1B3 socket mount standoffs.