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Early Double Triodes (part one)

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Early Double Triodes (part one)

Early Double Triodes (part one)

Early developments of the LV12

Circa 1943 button construction double triode prototype.  Countained within a side contact envelope with 8 pin round base connected inline to a comb support

 

Is this one of the forerunners of the 12AX7?

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More about: Development types, LV12, Museum pieces

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