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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: Attempting a simple 12AU7 preamp design. posted by gavinhaley on April 15, 2016 at 17:01:00:
A preamp is a tool to solve a problem. What is the problem you want to solve?
Gain? What signal drives your Gainclone to full output? 0.25mV? 0.5mV? You are likely NEVER going to use gain on the original signal to drive your amp. So what you have is a 1 to 2 Volt input signal, run through a Pot to throw away 95% of the signal only to re-amplify it back up to 0.25 mV.
Driving LONG cables? A preamp is part of a system. A buffer/ transformer attenuator will help. One of Dave Slagle's autoformers will be a major sonic improvement in this case over a 12AU7..
If you are bent on a preamp with loads of gain, at least use a 6SN7 or 6CG7. A little gain?, why not a 45 or a 2A3 through a output transformer.
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Follow Ups
- Does anyone see any obvious mistakes of have any suggestions? - Chip647 17:41:03 04/15/16 (6)
- RE: Does anyone see any obvious mistakes of have any suggestions? - Scholl 04:57:24 04/16/16 (0)
- RE: Does anyone see any obvious mistakes of have any suggestions? - gavinhaley 18:25:47 04/15/16 (4)
- "Where I use it is irrelevant. " - Chip647 05:33:36 04/16/16 (2)
- Au contraire - Salectric 07:49:30 04/16/16 (1)
- AC if you like intermod; DC if you don't... - Triode_Kingdom 09:24:12 04/16/16 (0)
- RE: Does anyone see any obvious mistakes of have any suggestions? - Eli Duttman 19:29:02 04/15/16 (0)
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