Thanks to Ampico-kid and M3-SRT8 for that useful info. I have been laid low with the flu, but in a day or two I should be able to quit whining and get back to work.
My RA-103 has rock steady vertical & horizontal sweep, so given the similarity, that's what I was expecting from this RA-102, as well. I'll start by applying more corona dope, since that issue must be addressed in any case. If I eliminate the corona but the jitter remains, then I guess the doorknob cap would be an easy and logical thing to swap next.
Happy 2017 to all !
Phil Nelson
Phil's Old Radios
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