Never seen a 12AU7 in an RF circuit

Posted by Ralph (M) on October 19, 2015 at 09:22:03

In Reply to: Sorry no, its designed in distortion numbers are quite poor posted by Timbo in Oz on October 17, 2015 at 20:19:16:

-That's a new one on me and I've been in the service industry since 1974.

The primary use of the 12AU7 is actually in audio. The tube is modified from the 6SN7/6CG7. Most of the applications I see are in guitar amps in the driver stage where high gain is not required but current is.

You don't have to run NFB on a 12AU7 either. You just need to run it biased correctly.

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Follow Ups Full Thread

Topic - 6CG7 instead of 12AU7? - ChasLieb 14:55:34 10/06/15 (13)

Much better sound and the pin-outs are different, some resoldering required. - Timbo in Oz 15:56:32 10/16/15 (4)

Cheap?? That's not true at all. - Ralph 12:45:08 10/19/15 (3)

Re:Other than the heater voltage, is the 6cg7 a substitute for the 12au7? - woffeldjur 10:08:28 11/12/15 (2)

Almost - Ralph 11:11:58 11/12/15 (1)

RE: Almost - woffeldjur 08:42:08 11/13/15 (0)

RE: 6CG7 instead of 12AU7? - Ralph 10:18:39 10/07/15 (7)

in most usage where the dissipation is low 6CG7s should sound just like a 6SN7 - Timbo in Oz 15:53:06 10/16/15 (6)

RE: in most usage where the dissipation is low 6CG7s should sound just like a 6SN7 - Blackdog 16:03:09 10/17/15 (5)

Sorry no, its designed in distortion numbers are quite poor - Timbo in Oz 20:19:16 10/17/15 (4)

Never seen a 12AU7 in an RF circuit - Ralph 09:22:03 10/19/15 (0)

RE: Sorry no, its designed in distortion numbers are quite poor - Blackdog 20:41:11 10/17/15 (2)

RE: Sorry no, its designed in distortion numbers are quite poor - Lew 08:41:33 10/19/15 (0)

I don't buy new, I now just upgrade / rethink vintage stuff. - Timbo in Oz 20:51:31 10/17/15 (0)

Follow Ups

Never seen a 12AU7 in an RF circuit - Ralph 09:22:03 10/19/15 (0)

Never seen a 12AU7 in an RF circuit

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