mesa boogie Mark IIB or C head?

  • Thread starter Thread starter Phosphene
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Phosphene

Phosphene

Horse Diaper
ive been to the mesa site and i still am not sure if what ive got is a Mark IIB or C or whatever (or what year its made) ive got parametric eq, 2 channels, pull brights x 2 (no pull deeps, though).....what else can i list to give any of youan idea what ive really got....damn ive had it for 7 years, figure id know by now.
 
this might help..........

The Boogie Files


i've had my mesa mark2b since 1981.........

still kicking strong!

lg-257401.jpg
 
looks like i got a Mark IIC or C+ (gotta go home and do this test that Mesa told me about to see....) my SN is 114XX which isnt in the range of C+, but it is marked "+" above the power cord.

well see

anyway ill never get rid of it
 
Wow. You have the Holy Grail. What's you're home address again:D .
 
i did the test and it is a mark IIC+............with eq, reverb etc....when they say CLASS A/SIMUL CLASS switch, i wonder if they mean the 60/100Watt switch?

address, unknown
 
no, the class a/simulclass is different than a power switch

it actually combines 2 different styles of tube circuit design.....

class a, like the older vox amps, versus class a/b, which is the common power section scenario....
the simulclass blends the 2 together....

it's all tube voodoo.
 
If my memory is correct I was told by Mesa that a MKIIC+ Simulclass amp runs @15 watts in class A mode and 75 watts in A/B or simulclass mode. Also the labels on the toggle switch will say "Class A" and "Simulclass" if it's a simulclass amp.
 
dude, did you ever check the link i provided?

it's got most all of it.........

http://homepage.mac.com/mesaboogie/MarkIIC.html

"The Mark IIC+ was the last of the Mark II series and featured a more sensitive (i.e. useful) lead channel and, more importantly, an improved circuitry in the effects loop. Unlike earlier Mark II models, pedals could be used without the amp's signal overloading their inputs. However, the volume pedal option on the Mark IIB discussed by Sacks cannot be implemented on Mark IIC+s.

Some owners/dealers/sellers often say the "+" refers to an amp having an EQ, but they are mistaken. The mistake originates because in the mid 1980s Mesa issued their Studio .22 model and then changed the name to Studio .22+, which featured improved wiring, etc. All the Mark II models could be made with EQ as an option, but not all of them did. A Mark IIC+ could, for example, refer to a 100 watt amp without EQ or reverb.

You can tell if a particular amp is a "+" by looking for a hand-written black "+" mark directly above where the power cord attaches to the back of the amp. Be aware that many vintage dealers jack up the price on a Mark IIC+ but often don't know anything about what the "+" means - they often don't even know where to find the "+" mark. Indeed, the mark itself can be forged, so let the buyer beware. But, you can call Mesa/Boogie and ask them to check your serial number against their records. Mesa/Boogie only made about 1,400 Mark II amps before going to the Mark IIC+."

and this:
"Simul-Class/Class A Switch: In the Simul-Class amplifiers the power (before clip) is much less in the Class A position - mere 15 watts. But the unique way the system is wired allows you to achieve a much greater degree of power tube distortion than with most other amplifiers ... and it is still very loud! In Class A, only the outside (outer left & outer right) pair of tubes - the EL-34's will be on. The inner pair - which are 6L6's - will also be turned on when the switch is in the Simul-Class position. In addition to this obvious difference, the biasing and control circuitry of the socket pairs are radically different ... and this is the heart of the now famous (and patented) Simul-Class circuitry."
 
yes yes i read it 2 or 3 or 4 times....also ive seen it in the past but didnt know how to get back to it.

thanks for the info.
 
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