i think i may have read something to that effect on
Eurotubes
i'm gonna look to see if i can find it again
edit- here is his page about mesas, i gave a quick skim through but didn't see anything, i might have missed it
euro-n
second edit- ok i think i found it near the bottom
Quote:
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Now about that pesky bias question. Dual Rec's are a unique amp because of the different settings available with the "spongy" and "bold" settings along "6L6" and "EL34" settings and the "solid state" and "rectifier" modes. Since a KT88 will draw almost twice the natural plate current that an average 6L6 draws your bias will go up! An average E34L will draw only about half the natural plate current that an average 6L6GC draws. When a DR customer calls me and is looking for an improvement in his clean tone and an improvement in dynamics I will often recommend using the JJ 6L6GC's in a cooler grade and running in the "EL34" mode which will get a DR to draw about 32 to 40mA per tube depending on whether it's run is SS, REC, Bold or Spongy. This gets the bias much closer to where it actually belongs when using a cooler grade of 6L6.
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