RE: Replace 12ax7 with 12at7

Posted by FenderLover on March 31, 2012 at 17:53:23

In Reply to: RE: Replace 12ax7 with 12at7 posted by Jim McShane on March 31, 2012 at 11:49:48:

Jim, yeah I usually have costumers try various 12A(_)7 types, to see if anything, it a head in the correct direction. Or a move away from the desired endpoint. After say, someone settles on a 12AT7, I will look at the scheatic and try to adjust the parameters (idle bias current), etc to get the tube more into the linear region--- if desired by the owner.

A lot of ppl want to keep this stage (usually input) as amendable to the various tube types. To keep swapping tubes with various songs, CD's, guitars, styles of music wanted.

For those new on the market DIY 5E3 and Champ 5F1 kits... the manufacturers really over drive the input 12AX7. Way over the original tweed settings. This leads to a not-so-subtle onset of OD esp with guitars that have hot pickups. Or gain in the stomp boxes. The 12AY7 is a great sub (almost an automatic sub) for these DIY. To get them to sound like what a tweed should sound like.

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Follow Ups Full Thread

Topic - Replace 12ax7 with 12at7 - pegwill 05:18:39 03/31/12 (18)

Think E80CC instead - andy evans 11:44:35 04/02/12 (0)

RE: Replace 12ax7 with 12at7 - BCR 05:35:45 04/01/12 (0)

RE: Replace 12ax7 with 12at7 - Neff 07:34:16 03/31/12 (0)

RE: Replace 12ax7 with 12at7 - Blackdog 06:01:39 03/31/12 (14)

RE: Replace 12ax7 with 12at7 - pegwill 06:12:29 03/31/12 (13)

one other thing. - Blackdog 06:41:41 03/31/12 (2)

RE: one other thing. - pegwill 06:54:37 03/31/12 (1)

RE: one other thing. - Alpha Al 20:53:13 03/31/12 (0)

RE: Replace 12ax7 with 12at7 - Blackdog 06:35:38 03/31/12 (0)

RE: Replace 12ax7 with 12at7 - FenderLover 06:35:16 03/31/12 (8)

RE: Replace 12ax7 with 12at7 - Jim McShane 11:49:48 03/31/12 (7)

RE: Replace 12ax7 with 12at7 - Michael Samra 04:39:23 04/01/12 (5)

RE: Replace 12ax7 with 12at7 - Jim McShane 12:23:47 04/01/12 (2)

RE: Replace 12ax7 with 12at7 - Cleantimestream 18:40:02 04/03/12 (0)

RE: Replace 12ax7 with 12at7 - Michael Samra 14:04:10 04/01/12 (0)

RE: Replace 12ax7 with 12at7 - Neff 05:19:01 04/01/12 (1)

RE: Replace 12ax7 with 12at7 - Michael Samra 14:04:34 04/01/12 (0)

RE: Replace 12ax7 with 12at7 - FenderLover 17:53:23 03/31/12 (0)

Follow Ups

RE: Replace 12ax7 with 12at7 - FenderLover 17:53:23 03/31/12 (0)

RE: Replace 12ax7 with 12at7

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