Seth,
The 6L6 JJ tubes are a bit "in your face" for blues, and with your SS front end, may be even a bit more sterile.
I would go to something like an NOS 5881 or a KT-66, and with something in the rating area of a GT #3-4.
Regards, Thanks Myles!
This is a "fixed bias" amp, but I'm very ignorant about biasing.
If I try 5881's or KT-66's will I need to have a tech do any biasing or adjusting?
I've heard that KT-66's are large. How much space do I need for them to be an option?
Thanks again for anly info.