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Hi all, I've read in the Mk IIB manual that, if pulled, the Treble Shift automatically engages in the lead mode. I'm assuming then that when you switch back to rhythm, the effect of the pulled Treble Shift should be null and void. On my amp, however, when I switch from lead (Treble shift...

Hi all, I've had my IIB since 1980. In all that time, I never really used the Effects Loop, mainly because I didn't use a lot of time-based effects, and also because I'd heard the loop was basically crap -- that it overloaded effects in the loop. After years of going dry and direct into the...

Hi all, Just looked at the bottom of my 1980 Mesa IIB Export PT, and it's a x100. It's one of the first IIBs ever made -- it may have even been a transitional model -- with a serial in the high 5300s. (Most references to the IIB seem to peg its origins starting around 5575, if I'm not mistaken...

Hi all, Original owner of a very early Mk IIb (60/100, export transformer, GEQ, Reverb, Hardwood, EVL-12). Playing a Les Paul R0 mainly, sometimes a Strat with EMGs. Even after all these years, I'm still having difficulties REALLY dialling the amp in. I'm considering sending it to Mike B for a...

Hi all, I have a Mesa Boogie IIB from around 1980. Recently, I started getting the occasional "volume swell" — I'll be playing, and then the amp volume climbs precipitously high all of a sudden, to the point where I have to hit the standby switch. I called Mesa and the guy I talked with...

Hi all, First post, nice to be here. Original owner of a 60/100 Watt 1980 Mk IIb....that has never been re-tubed. javascript:emoticon(':oops:') (Feel free to laugh! But seriously, it still sounds great -- at least to my ears.) I was wondering a couple of things: 1. Should I replace the...