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RE: Question on testing 12AX7s - gm vs. mA 539C. The sound test and Gm.

If a tube sounds great but measures poorly just let friends and family know, it would be a shame to throw out a great sounding tube. Contact me if you need a proper place to discard these tubes.
For commercial sale and use, most people seem to use Gm. The cut off is 1250 for your Hikock If I recall correctly.


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  • RE: Question on testing 12AX7s - gm vs. mA 539C. The sound test and Gm. - Mechans 11:18:49 04/08/17 (0)

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