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In Reply to: VTL 5.5 Preamp Tube Rolling posted by bjbakle on December 13, 2006 at 20:36:54:
The standard disclaimer: best to follow the recommendations of your equipment manufacturer; risk of damage or voiding the warranty.You can substitute 12AU7 for 12AX7 because the AU is a lower gain tube. I've actually done the above. I think the AT is in between the AU and the AX. There are other tubes that could sub too. DO a search on something like '12AU7 AND 12AX7' and you should be able to find many old posts about subbing tubes.
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Follow Ups
- In general yes... - soldermizer 22:17:09 12/13/06 (0)