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In Reply to: it would help if we better understood what you are trying to do, and.... posted by valva on August 29, 2005 at 20:04:19:
The 12AU7s are for a completely different preamp - I used 6DJ8s/6922s for many years in other preamps messing with all the usual suspects from Bugle Boys to Mullards to Telefunkens. This preamp uses 12AU7s and eats the 6DJ8/6922 preamps for lunch - it isn't even CLOSE. I'm using Mullard 12AU7s (well, a military equivalent anyway) in it now but hate spending $160 for 4 tubes. The experiments will try to determine if there's any treatment (cryo) or tweaks to the preamp circuit that can be done to get near-Mullard sound from ~$10 tubes. I've used up 1 set of Electro-Harmonix tubes in this preamp. They were surprisingly OK, but I want to get more-than-OK sound out of them. Figure if I start with a better ~$10 tube, the end result will be better.
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Follow Ups
- Re: it would help if we better understood what you are trying to do, and.... - I. Conoclast 20:52:02 08/29/05 (0)