Tubes Asylum

Don't do it.

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In Reply to: RE: !2AX7, octal replacement? posted by tesla on November 05, 2009 at 06:36:31

The closest octal to a 12AX7 is the 6SL7. However, the octal 6SL7 has a Mu of 70 versus the 12AX7 Mu of 100. They have different plate resistance and transconductance and need to be set at different operating points to be optimized. There is no octal tube that is 100% electrically identical to a 12AX7. If you are talking about a phono stage in there as well you will have issues with the RIAA curves.

Could you plug in the tubes and get sound out without making any changes? Yes, but it will not sound as good.

___
Long Live Dr.Gizmo

Follow Ups:

Plus... - Allen Wright 09:11:06 11/05/09 (1)
- RE: I second Allen's point.........nt - Neff 14:59:28 11/05/09 (0)

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