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If I'm not mistaken RT50c is from RT100H family and It's a tube amp. I own a RT100H head and I can dial the AD/DC tone you are looking for. pretty nice amp if you ask me.

I don't have the same issue as you. mine tend to have the same level, not a big deal if you ask me. If you want to get a million more tones out of your amp, add an EQ to your effect loop (send & receive at the back of your amp). I'm still messing with it after 8 months of playing around and...

Well, I found another RT100 today (sealed and unopened) opened and checked its bias. the amp wasn't even biased. one pair would read 36mv the other 78mv! so much for factory bias. mine wouldn't even go lower than 44mv (the pot wouldn't turn)

I tried the same thing but counterclockwise, it only went down to 45mv. same question here, should I remove the tubes, adjust the pot when the amp is off, put in the tubes and adjust it again to try and lower the voltage?

Funny thing, I blew a fuse the other day and went to change it. the manual says 400ma but the fuse that was inside was a 1A fuse! anyway, I changed it with a 400ma one just as the manual said. Randall get your facts straight! lol

I have the same exact question but funny how I've been looking through the forum and no one has answered this yet. I changed my stock Ruby 6L6GC tubes for a matching quad of JJ 6L6GC's and when I read the bias, it was at 106mv. my question is "is that the sum of both tubes current or the...