- Sep 27, 2019
- Reaction score
I just put in a new matched pair of Electro Harmonix 6V6's in my Deluxe Reverb Reissue. I got out my Bias Probe and saw that the two new tubes were running cool at a little over 15 ma. I believe that I biased the pair of JJ's that I was replacing at 25 ma. What I found was that I could only get the new tubes up to just under 23 ma. I went ahead and set them at 20 ma. The amp sounds outstanding, but what I'm wondering is if it's normal not to be able to set the bias higher than the current upper limit of 23 ma depending on the particular pair of tubes? Are these just cooler running tubes?