Quote:
Originally Posted by zeno
1) I only had one FBT bad in a hybrid & it was a massive kit.
2) never had a bad yoke I remember.
3) WARNING ! seems no two of these had the same hoz/HV so
dont get tripped up by that.
4) 212-139-01 is Zenith OEM P##
5) only HV regulation probs I remember were bad spots on the HV pot.
So often we kept a strip of them in stock. VDR's went bad in older chassii.
6) If the HO is getting good drive suspect a weak HO tube. Trouble is
they are BIG bucks. 6LF6 & 6LX6 will sub, on series hybrids
20LF6 & 26LX6 will sub.
7)Tripler can do it but they usually cracked open & burned or looked swollen / discolored.
enuf fer now
73 Zeno 
LFOD ! |
Here is what appears to be the replacement GE tripler.
And here's where my attention is currently focused, on what the Sams calls out as one of the VDRs, but I've never seen them in this form factor before, so I’m not 100% positive that’s what they are. They measure about 1.6M. The closest I’ve seen to this cylindrical package were earlier ones that were kind of blue, electrolytic cap looking.
I do have modern KOA SPEER varistor replacements, which have worked for me in a previous project which I may try here. It could be that one or more of these has built up resistance over the years and isn't doing its job.
Tripler could be suspect, but does not display any of the visual symptoms you mention.
As I mentioned the HO has been subbed with a good testing 6LX6, with no effect.