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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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In Reply to: Too Much HIGH GAIN - Just Build 807 Williamson A515 - Use of NFB? posted by Super_BQ on December 2, 2006 at 14:11:51:
Without NFB the amp has enormous gain, about 10x more than it would have with 20 db of NFB.Don't get sucked into the "all NFB is bad" theory. Properly done it can be a very effective tool. Poorly done it can kill the tone of an otherwise fine amp.
The hiss and hum will diminish VERY noticeably if you install the loop NFB, and the amp will likely be much more satisfactory tone-wise as well.
Fatbottle also mentioned that added capacitance would be helpful. I agree.
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Follow Ups
- Re: Too Much HIGH GAIN - Just Build 807 Williamson A515 - Use of NFB? - Jim McShane 14:55:35 12/02/06 (6)
- I Can't Believe the DIfference - Super_BQ 17:50:24 12/02/06 (5)
- Re: I Can't Believe the DIfference - Jim McShane 07:54:58 12/03/06 (0)
- Re: I Can't Believe the DIfference - sorenj07 19:01:10 12/02/06 (3)
- NFB does not reduse power - Ray Moth 03:33:07 12/03/06 (0)
- R25 - References - Super_BQ 02:38:33 12/03/06 (0)
- yes 3k is too low - lovetube 20:14:17 12/02/06 (0)
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