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Hi all! I would like to know if anyone owns a vertical 2x12" rectifier cab and if a recto head fits well on the top of it.

Hi all! I've recently bought my first rectifier, and it's a beautiful Tremoverb. I'm a Mark IIIc+ owner too, so I was searching for a rectifier sound and I believe I've found one of the best rectifier sound mesa ever produced. I've noticed that clean channel as a slight hum ( it obviouly...

Hi anyone! I would like to buy some new knobs for my mark III. I'd like to buy the little one (like the ones on the back of the chassis for reverb, presence, etc...) , does anyone know where i can find them? I don't want to buy from tube amp doctor, they are too much expensive ( about 13$ for a...

I've spent few hours on SLO 100 and mark IV schematics and i've found something useful and interesting. I've drawn so a schematic of the possible new lead/r2 gain control for my mark III (a sort of volume1 over control). Infact it's like an over boost for main volume1 control, not a real...

Finally, after months of playing with a great smile on my face i've compared my Mk III blue stripes I modded C+ myself and my friend Mk III red stripes, both played through a 4x12 standard recto. Let's start from clean channel...maybe this is not the piece of cake, or the primary reason to buy a...

So anyone is able to say anything about this mod???? http://forum.grailtone.com/viewtopic.php?t=84&highlight=reverb+mod I've found this interesting post before my request.... he only added a 50k trimpot instead of the fixed bias resistor (factory fixed by mesa). Is this mod right? Can i...

Hi! I'm tired to buy only mesa tubes, and want to experiment with different tubes...I know i'll save some $$ too and can achieve also good tones! Since my amp is a simulclass, is it possible to make a mod with an adjustable bias, allowing me to continue playing with both El34 on outer positions...

I'm probably selling my mark IIIC+ to buy a mark IV (for its versatility and cause I need a real clean with high gain settings on lead channel) and probably i'll mod it to sound similar to IIC+... but I was wondering about Mark IV switching sistem...after years of searching for the right system...

Is anyone here who would like to share with me his setting with a IIC+ or IIIC+ to obtain a good first clean channel and a wailing lead drive too? Using a humbucking guitar how good is your clean channel without compromise lead with these amps? Do you find like me that the pull deep pot (as...

I broke one of my 6L6 3 days ago and now i have only my El34 working. Now i'm wondering: could my amp work in class A mode with only El34 even if there aren't 6L6 in the inner sockets? If so, is there any loss in tone or could it damage my amp?

Just a little curious about my amp clean channel. I've got a blue stripes simulclass. Running it in class A with EL34 i was wondering about the amount of Volume 1 (the first pot) needed to keep this first channel clean with a les paul standard with original pickup (not the burstbucker). This...

Hi! I've found the right Mark IIC+ schematic. During a short comparation i've found which are the "great" differences between mark IIC+ and mark III (obviously excluding transfo) and i've took the decision to mod the amp by myself. I'm in Italy and it's a bit difficult sending my amp to...

Hi all! I'm unluckly an italian resident, so for me it's quite impossible to send my mark III blue stripes to Mike Bendinelli at Mesa factory to be modded, it will cost me more than buying an used Mark II C+ on ebay... So i pray if there's someone here that have a Mark III modded C+ to explain...

Hi! Is it normal that after the crunch volume mod my lead channel has so much feedback (it's a larsen effect??), also with the guitar volume opened but without playing it?I use a fender strato with a seymour duncan hot stack in the bridge. These are the setting i use. Volume: 8shift Treble: 7...

Does anyone know what really does this volume pot in that point of the circuit?And why i have to connect a wire to r131 and one tho the hole of the removed r130? What really affect these resistors in the circuit board ? I tell you because in the schematic there is no trace of a number to...

Hi Boogiers! This is my first post here...i'm a happy owner of a mesa mark III blue stripes...i've had problem with the R2 volume mod and now my amp is checked by a technician...but the problem is that he need a better schematic, cause the one available here on the web is not good...has anyone...