Ok it's not a Type 26........What the heck is a Type 12A .

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A friend gave me what he thought was 18 untested type 26 Triode tubes. After testing them all on my Simpson Tube tester, I found 5 that tested as dead..

I decided to test the dead tubes for continuity, I found 3 new looking tubes with clean pins had continuity. One of the 3 had a paper label that was dated 1936.
I then measured the ohms of the filaments each had about 6.2 ohms.....
When I measured the ohms of known Type 26's each read about 3.1 ohms.

.. On closer inspection of the paper labeled Tube written on it was a #12A..... Also after cleaning the tube I could make out an etched badge with the number "12A" inside.

My Simpson Tube tester has setting for a 12A and all 3 tubes test very good.......

.......So what is a "Type 12A" .... and does it have any Audio use ?/

Thanks

Willie

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Topic - Ok it's not a Type 26........What the heck is a Type 12A . - drummerwill 08:43:49 09/25/15 (4)

Sure - 12A are nice tubes - andy evans 09:03:35 09/25/15 (3)

this IS a stretch, somewhat close to a 71 A~nT - Cleantimestream 07:19:36 09/26/15 (0)

RE: Sure - 12A are nice tubes - drummerwill 22:18:16 09/25/15 (1)

RE: Sure - 12A are nice tubes - andy evans 00:29:24 09/26/15 (0)

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