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RE: Question re: replacing 12AX7 with lower gain 5751

5751 has a lower Mu than 12ax7, that is not the same as lower gain.
I use 5751 often in place of 12ax7 in the input stage of my Rogue amp. I have never noticed any group in gain for the substitution. That said, there could be an effect if they were substituted in a phono gain stage.
The general consensus is that outside of a phono stage, 12ax7 and 5751 are interchangeable in 99% of equipment out there.
Enjoy the roll!

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  • RE: Question re: replacing 12AX7 with lower gain 5751 - Mendel 11:30:43 09/03/21 (0)
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