Mark IV Rev A schematics?

[HalfDeaf]

Last fall I picked up an early Mark IV - serial number 234, actually. I've been having trouble finding schematics for this Rev A model - does anybody have 'em or know where I could get them (in pdf)?

In keeping with first-poster tradition, I'll attach a couple pictures. She's got the "rusty transformer" upgrade that everybody's been buzzing about lately hehehe.

I got this old girl for $700. Its my first Mesa, and after a couple weeks with my amp tech getting the caps replaced, she sounds pretty good. That was 4 months ago...I'm still turning knobs and swapping tubes. I should be closing in on grailtone any minute now...

 

[Boogiebabies]

http://schematicheaven.com/boogieamps/boogie_mkiv.pdf

 

[Elpelotero]

be wary that Mesa often puts false values on their schematics to ward off clones

 

[HalfDeaf]

Thanks all.

I just wanted the schematics so I could understand where the different preamp tubes are in the signal chain. About the false values - it would be interesting to go through the circuit and see how they match up with the actual components. I didn't know they did this, but perhaps it explains why I've never heard a good Mesa clone, whereas Fender and Marshall clones can be quite good.

 

[jvk]

To add to all the confusion, I'm pretty sure there are minor differences within the A and the B, there are subversions if you like. I've yet to confirm this.

 

[TheSon]

I came across this thread looking for mark iv circuits but I cant find one with anything on the switching or truth/logic table for the ldr sets .... am i missing something obvious or is something obviously missing?

please help anyone... how do i know which ones be in and out for what?

cheers.

 

[Boogiebabies]

I came across this thread looking for mark iv circuits but I cant find one with anything on the switching or truth/logic table for the ldr sets .... am i missing something obvious or is something obviously missing?

please help anyone... how do i know which ones be in and out for what?

cheers.

No, your missing two pages full of LDR's and their function.