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Hi guys, I don't post here much but I need your help as I recently broke the pot on my Mark III purple stripe head. The pot is the MIDDLE pot, push/pull (R2 on). Now looking at the Schematic I found on the tubefreak website (apparently that schematic isn't 100% correct?) It looks like a 10k...

Was loading my Mark III Purple stripe head into my car last night after a gig when my cabinet came into contact with the Mark III face panel and broke the 'BASS' knob off cleanly. The rest of the pot is still in the amp aswell as the nut and washer holding it in place. So, I haven't fired the...

...for MASSIVE clean tone, with a little bit of grit. Class A mode (mark iii simul) at '3' on the master volume (pull deep) into my carvin legacy 2x12" cab (closed back) wow... just wow... I wish I didn't have to crank it up so loud.. normally I have it at '2' on the master for band practice...

Hi guys, I currently have a Mesa/Boogie metal grille halfback vertical 2x12" cabinet (what a mouthful haha) with MS-12 (bottom) and C90 (top) speakers. It's a great cab but it's a little big for the covers gigs I play with one of my bands. So instead I have a Carvin Legacy 2x12" cab (vintage...

Hi everyone, I just picked up this used 1x12" halfback cab here in NZ and I'm waiting for it to arrive in the mail. It was advertised as a Mesa Boogie 1x12" with JBL Mi speaker. No logo or other info currently just pictures: What I have noticed is that my mark III head has the exact same...

Has anybody made a tube guard of sorts to protect their mark series amp? My mark III has the reverb pan cutout but no reverb so I'm always paranoid about my Tubes getting damaged from the bottom and the back of the amp whenever I take it anywhere in the car etc. I've also thought about building...

Today I got to run my Purple stripe Mk. III simul w/EQ through a Marshall 1960AX slant 4x12 cab. In Class A EL34 mode the tones were killer, then I clicked in the EQ and switched to Simulclass. WOW Is all I can say. The tone was like Van Halen on steriods with a heap more gain. More like Jerry...

Hi guys, I'm pretty sure my amp came fully loaded from the factory but a previous owner took out the reverb tank, but there are 5 preamp tubes in place. One is the reverb driver isn't it? if the reverb tank isn't there do I need the tube that drives the reverb in the amp? Thanks for the help...

Anyone using V30s with their Mk.III ? I might be about to pull the trigger one a [new] Randall 4x12" V30 cab with metal grille, I've heard it before with my friends 3CH DR and it sounds awesome. Just wondering what the general consensus was regarding the mk. 3 and V30s?

Does anybody have a schematic for the R2 gain mod? I know the R2 Volume mod is easy to find info about, but I want to do the Gain mod at the same time. Also, my R2 channel is quieter than R1 and I balance my Lead channel to be the same as R2 then I roll down my guitar volume control for quieter...

Does anybody use (or has anybody tried) switching the Mark III graphic EQ using a Boss FS-5UL (latching type) footswitch? I know I need a stereo TRS cable but my amp doesn't have reverb, so as long as I get the polarity right then a single button should work right?

I have a mark 3 simulclass purplestripe short head with no reverb. Looking at the bottom of the chassis I can see FOUR 12ax7 preamp tubes, and there seems to be a Fifth 12ax7 [or similar] tube inside a metal casing next to one of the other tubes. Is it a spare tube being held in place? is it...

My Mark III purple stripe short head runs on 117 volts but I want it to run on 230v so I don't have to use a step-down transformer. I know some boogie's were shipped with an 'export' transformer, and some had voltage selection on the back (saw it on the back of a friends MK IIC+) mine obviously...