Did I miss any of the 12AX7 replacements?

Posted by Maddnotez@gmail.com (A) on September 1, 2014 at 19:37:48

I've been trying to learn all of the replacements for the 12ax7.

From what I could find, this is the best list.

12BZ7*, 12AX7WA, 12DF7, 12DT7, 7025, 7025A, 12AD7*, 12AX7A, 12AU7A•, 7729, 12DM7*, 5751*, 5751WA*, 6057, 6681, 7494, 12AU7•, 12AY7, 12AT7, 12AV7.

* means parallel filament
• means may not work in all circuits

I have no idea what parallel filaments are so Idk if I can use them or not for my amp, or how to learn that information. (I can call the maker of the amp in use but they seem to only say their specific "recommended" tubes and not say what other tubes will safely work)

I compiled this list from various places, many sites or pages I've found have a random one off that the others didn't list.

I've also read sources that limit to only a few tubes:
12AT7, 12AU7, 12AY7, 5751 and 7025 for example.

I am curious if these are all ok to use? Are the sources wrong? Are there more than I've listed? Should I stay away from anything different?

I want to test different tubes for my guitar pre amp and am trying to compile a list of all options.

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Topic - Did I miss any of the 12AX7 replacements? - Maddnotez@gmail.com 19:37:48 09/01/14 (18)

RE: Did I miss any of the 12AX7 replacements? - sony6060 09:14:06 09/06/14 (0)

RE: Did I miss any of the 12AX7 replacements? - mobiasloop 06:22:00 09/04/14 (0)

RE: Did I miss any of the 12AX7 replacements? - BCR 13:07:10 09/02/14 (8)

Add the 7058 - Freo-1 15:38:58 09/05/14 (7)

Beg to differ. - Dave Pogue 05:12:03 09/06/14 (5)

RE: Beg to differ. - Freo-1 05:51:22 09/06/14 (4)

RE: Beg to differ. - Dave Pogue 07:31:20 09/06/14 (3)

RE: Beg to differ. - Freo-1 09:14:30 09/06/14 (2)

RE: Beg to differ. - Dave Pogue 09:38:40 09/06/14 (1)

RE: Beg to differ. - Freo-1 09:41:49 09/06/14 (0)

RE: Add the 7058 - BCR 16:00:59 09/05/14 (0)

Yes, No, Maybe - Stale 09:41:26 09/02/14 (0)

Proper 12AX7 variants - CV4109 09:35:47 09/02/14 (0)

RE: Did I miss any of the 12AX7 replacements? - Palustris 09:04:44 09/02/14 (0)

RE: Did I miss any of the 12AX7 replacements? - Caucasian Blackplate 21:38:37 09/01/14 (0)

RE: Did I miss any of the 12AX7 replacements? - skriefal 19:41:46 09/01/14 (2)

RE: Did I miss any of the 12AX7 replacements? - Maddnotez@gmail.com 04:45:03 09/02/14 (1)

RE: Did I miss any of the 12AX7 replacements? - Tom Bavis 12:14:56 09/02/14 (0)

Did I miss any of the 12AX7 replacements?

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