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Continuity meter




I'm going to assume that you have a continuity function on the meter you use to check tube bias. If so, above is a crosscheck I came up with from the data sheets of the two tubes, to be certain that the adapter is wired correctly before you use it in your amp. I wasn't willing to leave the adapter to "It's probably OK", and it only took a minute to test.

The column on the left are the 12AU7 pins, and on the right are the corresponding 6SN7 sockets.

Good luck with it, and I strongly suspect you'll soon be a member of the 90% Club (who prefer the 6SN7 over the 12AU7 in the VTA). Please keep us posted.



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  • Continuity meter - 1973shovel 08:07:54 03/17/23 (1)

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