12AX7 vs 12AT7

Flyin_V · 3826

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Offline Flyin_V

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on: April 02, 2015, 10:41:07 AM
Is the 12 ax7 a direct replacement in the Stereomour or is a 12at7 needed?

Thanks.


Offline Paul Birkeland

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Reply #1 on: April 02, 2015, 12:57:46 PM
The 12AX7 is poorly suited for driving 2A3's, and is not an acceptable or functional substitute for the 12AT7.

There are tons of dual computer triodes that are similar enough to a 12AT7 to work in the circuit. 

Here's some light reading on the subject:

http://www.audiotubes.com/12at7.htm

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

Offline Paul Joppa

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Reply #2 on: April 02, 2015, 02:30:36 PM
The 12AY7 (or the much-admired 6072 variant) on the other hand should work in the current version of Stereomour. I don't recall that anyone has tried it yet, though, so no promises.

Paul Joppa

Offline Flyin_V

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Reply #3 on: April 05, 2015, 06:58:39 AM
Thanks for the useful info.

Lary


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