Mesa Boogie Mark II c+ schematic & experience

Status
Not open for further replies.
Jump to Latest
A

Audio2015

Member
Joined 2015
#1
Hey guys 😀

I'm new here and I wanted to ask you for your help.
Together with a friend, I planned to build a guitar amp.

Does anyone have a schematic of the Mesa Boogie Mark II c+ that is easy to read?
The component values on the copies you can get on the net are not always clear to me ...

Did anybody already build a Mesa Boogie Mark II c+ clone?
I would be glad to hear your experiences and may you even have some advice for us? 🙂

Yours sincerely,
Sam
 
#2
That is old enough you might call Mesa and ask if they can send you a clean copy. But be aware, the factory copies in those days were not the best anyway. We can usually figure out doubtful values from the circuit anyway. Here is one:
http://bmamps.com/Schematics/Mesa_Boogie/Mesa_Boogie_Mark_II_C+_Schematics.pdf

Even if that is not clear for you, look at the other models in the Mark II series, as the circuits are similar.


This is an extremely complicated guitar amp, have you built amps before? If not, I highly recommend building something simpler first. get an idea what building is all about before tackling something like the Mesa. have you ever seen the inside of one of those amps? Mesa is famous for their cramped circuit boards and difficult access.
 
#3
Enzo said:
...
This is an extremely complicated guitar amp, have you built amps before? If not, I highly recommend building something simpler first. get an idea what building is all about before tackling something like the Mesa. have you ever seen the inside of one of those amps? Mesa is famous for their cramped circuit boards and difficult access.
Click to expand...

Totally agree, it's a complex high gain amp, so all the potential problems like self-oscillation, hum, buzz and hiss are exacerbated. If you haven't already done so, build a simple low gain amp first - much easier to get it working properly. That way you should get a nice tube-sound for your cleans and you can use pedals for distorted sounds. 🙂
 
Last edited:
#4
Thank you for your replies!🙂

I will ask Mesa for an easy-to-read schematic. Otherwise I will try to figure out all the component values from the original schematic 🙄
I already have some experienence with power amps for PA purposes (repair).
My friend ind I decided to try building the Mesa Boogie Mark II c+.
We carefully read your warnings, and we are aware of the fact that this project is anything but simple. Let's see how it will go on 😉

Sam
 
#6
It is no more complicated than any other valve amplifier. Break down the stages, 1/ preamp. 2/ Tone control amplifier. 3/ Graphic equalizer. 4/ Reverb drive and return. 6/ Power amplifier. 7/ Power supply. That is all there is to it.By the way, don't make a copy or you will be infringing their copyright!
This particular model uses two 6L6GC and two EL34. hence the mixed DC bias.
 
Last edited:
#7
Then you are a brave lad, Jon. Unlike the typical Fender which is cloned by the thousand, this has solid state sections, meaning extra power supplies. That graphic is inductor based, so sourcing those adds to the complexity. He will need some Vactrols for switching.

If he plans to clone the board, it is one of the most dense in the game, parts stacked on other parts.
 
#8
It may be less trouble to build a new one than work on an original...lol

Mesa Boogie is a PITB to work on. Be careful what you say to Mesa....they think they have a patent on everything!!..lol

Oh, and BTW...the Mesa Nomad 45 re-build I have been messing with is still not working 100% right after many hours of work...just sayin

Cheers,

Billy
 
Status
Not open for further replies.
Top Bottom