Now for a littlle cold water - just drove 60 mi and back to borrow the CRT tester from DRH, and found out I shouldn't have bothered because the heater is open. (measures 180k ohms, actually - don't know where that is coming from). NO visible heaters when the tester is attached.
Has the tube gone to air? I can't tell - doesn't spark or anything when the tester is applied, but I suppose the tester voltage may be too low to do that.
Does anyone know if anyone is rebuilding metal cone 21AXP22A CRTs? (And is it worth bothering if it went to air, in case it has an air leak at the face seal?)
Tried knocking on the base a bit with no results. Anyone with experience that some other treatment (e.g. heating the pins?) might have success?
Anyhow, unless I could find a CRT, working on the rest of the set is not such a rush job anymore.
