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RE: Input Sensitivity of Fisher 55A (6550 version)

It's the same 2.0v input for the 50A and the 55A.Keep in mind that first tube is a 12AU7 where most amps of the day used a 12AX7.Gain is much lower.
"For every complex problem there is an answer that is clear, simple, and wrong" H. L. Mencken


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  • RE: Input Sensitivity of Fisher 55A (6550 version) - Michael Samra 19:37:30 02/23/15 (0)

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