All the crusty oil seems to originate from that choke and it's fixings. I can't see what's wrong with it or the heater winding, all resistances check out fine, but doesn't work and drags down EHT. Because of this I've carefully removed it all and I'll keep using an TV20 stick
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I want to pass a current of 20mA through the overwind, as suggested many times on this forum. The overwind measures 136ohm so I calculate it to need 2.7vdc. Is this right, it doesn't seem like a lot compared to what I've read others have used
Regards
David