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HI EVRYONE AND MERY CHRISMAS 2022.... Good morning all I am looking for photos or a plan to adjust the bias of my 6l6 tubes. it is enough I think to replace a fixed resistance by an adjustable one...? which ? what value? what power ? Thanks for your help on this item. Dom

hello recently I have a major power loss on my amp. I checked the voltages of the power supply board and they are all good. I have to turn volume 1 all the way up to hear a slight overdriven sound. I cleaned all the jacks and changed all the tubes (preamp and amp) I even changed guitar and input...

Hi everyone i just want to know who is what ? i have 5 connections in the middle of the Mark IIb chassis. i suppose: A) one RCA for reverb FS with a red wire https://imgur.com/gallery/UzlOteT B) one Jack double with yellow wire...

hello would like to use all the possibilities offered by my mark IIB (export version 60/100w equalizer and reverb). and as I do not have the wiring corresponding to each jack I would like your help ... I posted 2 photos corresponding to the chassis of the amp. I followed the wiring of each jack...

hello I would like to use the preamp of my Mark2b with my mark 4b ... would you have an idea of the connections? I have 2 jacks on the chassis of the M2B ... which will be for the preamp out / pwr amp in? the other will be the gain boost? which jack for the EQ? On the Chassis? and for the out...

HELLO ANYONE HAVE A SCHEMATIC CONFORM WITH MARK 1 ? i think about mainboard , powerboard, alimentation; reverb and Ge (not sure) pcb or layout from mark1 are really good for me if you can trade .... thx for your help dom

Hello Can someone give me to me a schematic of MARK 1 ( preamp and power amp) i found some informations but no possibility to read correctly the values of resistors and capacities... perhaps it will existe a PCB with layout about Mark1 ?(it will be fantastic) nota: i don't know if the Mark1...

Hello all MARK 2B i need some informations about female jack on Mark 2B chassis. look at this pict https://imgur.com/gallery/mKvcHXy I add 4 colors for theses jacks into this pict green: ? red: ? blue: reverb ? yellow: ? mARK 4B...

hello Could someone tell me where I can buy the 4 plastic plugs that equip the MarkIV amps ? These are the 4 black plastic parts that are above the 4 silent-blocks that hold the chassis. Thank you for your answers Dom

hi averybody I bought a very dirty and rusty mark2b all over the place. I saw in the forum that some people had been able to make the corresponding PCBs. it's a Mark2 b with reverb and 100w equalizer. Could you communicate to me and send me if you have the layout and the calligraphie so that I...

Hello, Reluctantly I part with my Mésa Boogie MARK IIB 1982 mahogany export version (with Reverb and EQ) 60 / 100W. It is in excellent working order. Tubes 12ax7 and 6L6. HP: black shadow 150 w It is equipped with a Rythm / Lead Footswitch as well as other connection possibilities. send / return...

hello from france i have partS for Boogie amp: 1 : speaker Altec 417 8c. 1 : speaker Black shadow EVM200 10: Button for Mark 2/3. 16: Button for mark 4. 1:Grill osier for front combo. 10 OPTO COUPLERS VTL 09 Buttons for GIBSON and other guitars ( blue, green, black..) Ask me for...

Hello I have a Mark 4B and recently The red LED on the front AV just above the output / level button is weakening. it lights up then from time to time it goes out slowly until almost no more light. if I tap on it it turns on again .... does this come from the diode or from the opto-coupler...

Hello I have been reading for a while now all that can be said about mesa boogie mark 1, 2,3,4,5. These amps are of good quality but there is a sorely lack of documentation for the connections and possibilities offered ... Could someone explain to me clearly with a drawing the possible...

hello everyone if i decide to change my MARK2b to a mark 2C+ i need to change all the PCb board ? where can i find these pcb board ? and the price ? i looked the schematics draws......and i think it's ^possible to upgrade my amp... i have a mark2 b with reverb and GE. (60 and 100) watts. i...

Hello I need help !! the V4 preamp (12ax7) is no longer supplied correctly .... (weak filament) the reverb no longer works ... and when I put the Graphic Equalizer I lose half the power. I tried to put a footswitch for the reverb ... would that have destroyed a circuit? the reverb transformer...

Hello mesa boogie's people i have a MARK2 B and 2 connections (2 jacks) near Tubes. i suppose it's connection for reverb and equalizer by FW. what footswitch a can use ? one for each ? ps: how can i post an image here ? thx for your returns dom

hello i need to find a knobs for my MARK 2 B... someone can help me or guide me where i can found ? in france very difficult to have a supplier with these knobs or perhaps someone can sale to me a knobs ? thanks a lot for your answer dom

hello could someone give me the references and values of the potentiometers and knobs for my MK2 B ? vol1: pull Bright ref ? knob ref: ? treble: pull Shift ref ? knob ref: ? bass: ref ...

hello could someone give me the references and values of the potentiometers and buttons for my MK2 B ? vol1: pull Bright réf ? treble: pull Shift réf ? bass: réf ? middle: réf ? master 1...