RE: Measure the voltage in/out of the preamp

Posted by Russ57 (A) on September 27, 2016 at 15:20:14

In Reply to: Raising gain on 12AU7 input tube. posted by Cougar on September 27, 2016 at 10:45:47:

Many of todays sources will drive a power amp to clipping without a preamp. So many preamps operate at less than unity gain. This isn't such a smart thing.

So lets see what your source and preamp are operating at when the amp is playing at normal listening levels. If the preamp is operating at a gain of 1/2 to 3, no problem. If it has to be 5, 10, or more then, and only then, would I consider modifying the power amp. Of course this somewhat depends on the preamp

Oh, and do this with something other than a turntable as a source.

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Follow Ups Full Thread

Topic - Raising gain on 12AU7 input tube. - Cougar 10:45:47 09/27/16 (19)

Sounds like from the responses that.... - Cougar 11:03:43 09/28/16 (1)

RE: Sounds like from the responses that.... - FenderLover 15:45:47 09/28/16 (0)

RE: Raising gain on 12AU7 input tube. - Naz 21:26:01 09/27/16 (1)

RE: Raising gain on 12AU7 input tube. - Cougar 10:59:08 09/28/16 (0)

The best solution - Chip647 19:03:26 09/27/16 (6)

RE: The best solution - Cougar 19:41:07 09/27/16 (5)

There is nothing wrong with that - Chip647 20:40:46 09/27/16 (4)

I will put the Weber WZ68 in...... - Cougar 21:17:19 09/27/16 (3)

RE: I will put the Weber WZ68 in...... - Tre' 07:39:38 09/28/16 (2)

I have never had to turn.... - Cougar 10:55:44 09/28/16 (1)

RE: I have never had to turn.... - Tre' 11:12:24 09/28/16 (0)

RE: Measure the voltage in/out of the preamp - Russ57 15:20:14 09/27/16 (0)

RE: Raising gain on 12AU7 input tube. - FenderLover 14:42:03 09/27/16 (1)

Yes, it's the newer low gain PCB. - Cougar 18:54:52 09/27/16 (0)

12AT7... - Ralph 12:48:23 09/27/16 (3)

RE: 12AT7... - Cougar 18:53:09 09/27/16 (2)

RE: 12AT7... - Ralph 10:07:28 09/28/16 (1)

There is one posted on the..... - Cougar 11:23:46 09/28/16 (0)

RE: Raising gain on 12AU7 input tube. - Eli Duttman 11:41:21 09/27/16 (0)

Follow Ups

RE: Measure the voltage in/out of the preamp - Russ57 15:20:14 09/27/16 (0)

RE: Measure the voltage in/out of the preamp

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