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Hi Cliff,

I appreciate your having taken a look. B1 to B2 does indeed have continuity, as noted. The results for those checks were duplicated, and remain consistent from the first round of checks (through which there is a hand-drawn green strikeout in the image, since more enamel was removed from the solder joints at the transformer, before the checks were all performed again).

(and the image is actually directly out of Hans’s manual, with the numbering and results from my board added.)

Thanks again for any further ideas!
Garrett KC3UNP