mark1101 Posted April 5, 2008 Share Posted April 5, 2008 Craig rebuilt this amp a few years ago and installed the bias mod. What is the correct bias setting for the 7591s? I retubed last night and forgot what the correct setting is supposed to be. This time I tried ElectroHarmonix 12ax7s and 7591s. Very nice. Thanks for any help here. Quote Link to comment Share on other sites More sharing options...
oldbuckster Posted April 6, 2008 Share Posted April 6, 2008 Is that the kit form of the 299 ? If it is ,the bias should be 0.35 ........... or 0.32 is what mine is biased at ..... (for 299-D) Quote Link to comment Share on other sites More sharing options...
mark1101 Posted April 6, 2008 Author Share Posted April 6, 2008 Thanks for the info. I had it set way too low. Better than too high I guess. Quote Link to comment Share on other sites More sharing options...
JBryan Posted April 7, 2008 Share Posted April 7, 2008 Thanks for the info. I had it set way too low. Better than too high I guess. Actually, setting the bias higher than the recommended spec puts less stress on the tubes than a lower setting. Quote Link to comment Share on other sites More sharing options...
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