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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: TK, I would have discussed this privately, but as you don't accept mail... posted by Allen Wright on October 18, 2006 at 01:59:41:
Hi Allen,I agree with your LM317 conclusions. It's not good used directly in the audio path. I have, however, used it under a cascode of a BJT or FET (or triode) with good effect. The upper device multiplies and defines the high Z characteristics out to high frequencies, while the LM317 nicely sets a fairly precise and relatively low tempco current. Also I've used the LM317 under a big bypass cap in cathode bias circuits. Either way something else must hide the LM317's intrinsic poor sound quality while taking advantage of this cheap, fairly precise (at DC) current generator.
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Follow Ups
- Re: TK, I would have discussed this privately, but as you don't accept mail... - BBeck 09:37:35 10/18/06 (2)
- "used it under a cascode of a BJT or FET with good effect" - Allen Wright 13:12:15 10/18/06 (1)
- Re: "used it under a cascode of a BJT or FET with good effect" - BBeck 14:02:42 10/18/06 (0)
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