10-21-2020, 09:12 PM
I have a quad of JJ 6L6s I could try. Will I need to change the screens back to 470ohm if I want to try the 6l6's after trying the 1k/6550s?
Also, I need to add a bias trimmer. I had seen someone previously post (in an old thread of mine) a 47k resistor in series with a 50k trimmer. Would that work to bias both the 6550s and 6l6s?
In terms of headroom, I was hoping I could get a little more clean volume before breakup on one of the channels, which was why I was thinking of the preamp swap but I get your point about power amp distortion before the preamp will.
Also, I need to add a bias trimmer. I had seen someone previously post (in an old thread of mine) a 47k resistor in series with a 50k trimmer. Would that work to bias both the 6550s and 6l6s?
In terms of headroom, I was hoping I could get a little more clean volume before breakup on one of the channels, which was why I was thinking of the preamp swap but I get your point about power amp distortion before the preamp will.