Re: Ever Modded a Fender Blues Jr.?
I picked up a Blues Jr. with a wonky reverb and a Reverend AllTone speaker about a year ago for short dough thinking it'd be a fun project. Boy, was I right.
I did most of the BillM mods listed above; reverb mod, tone-stack mod and the presence/bright switch mod. I also got new tubes from EuroTubes and Bob set me up with a great fresh set.
Immediately it made the difference between a decent amp and a great amp. I gig the Blues Jr. over a Deluxe Reverb Reissue with a'64 Jensen and NOS tubes, a Trace Elliot Vellocette (Gibson GA-15), and a Princeton Reverb II. The thing is an all-out tone monster with a decent amount of flexibility. I've even challenged myself to play an entire night without a single overdrive pedal and just a tuner pedal and walked out of the venue with a handfull of compliments on the tone.
I've got a second Blues Jr. on my bench now that I'm modding for my brother.
They're great sounding amps...it just takes about $10 worth of materials and an hour of your time to get them there.