1978 Boogie MkII questions

The Boogie Board

Help Support The Boogie Board:

This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.

Lefty Phillips

New member
Joined
Apr 25, 2021
Messages
4
Reaction score
0
Hey all, thanks for the add. Clearly, lots of very knowledgeable folks here, so thanks in advance for your help. I'm a player, not a builder, and I've got a 1978 Boogie that I'm refreshing and prepping for use in the studio.

EDIT: Thanks to Joey1970 and Wyzard, I now know for sure that it's a MkIIA

EDIT: Figured HRG out, Hundred watt, Reverb, Graphic EQ

EDIT: Figured out the toggle switch, too. I know I have the part somewhere in a box.

EDIT: Thanks to Wyzard, I now know what V1 through V5 does what.

Finally, thanks to everyone who took the time to look at this thread, even if you didn't have the answer to my (probably stupid and annoying) questions.

https://www.facebook.com/mudfingerindustries/photos/a.5361015150638008/5361013837304806/
https://www.facebook.com/mudfingerindustries/photos/a.5361015150638008/5361013793971477/
https://www.facebook.com/mudfingerindustries/photos/a.5361015150638008/5361013847304805/
https://www.facebook.com/mudfingerindustries/photos/a.5361015150638008/5361013787304811/
 
Joey1970 said:
That's a IIA. No effects loop.

Not entirely true- there is a rudimentary one, and it's not tube buffered like in the later amps. The send is located under the chassis, and you use the top jack on the back, labelled "send/return". It's capable of producing some ....ah, interesting results, located as it is in the "wrong" part of the preamp circuit.

See page 2:

https://www.manualslib.com/manual/564188/Mesa-Boogie-Mark-Iia.html
 
Wyzard:

Thank you SO MUCH for posting the MkIIA Operating Manual!!!

It's not on the Mesa/Boogie website, which I checked before posting. I mean, they have everything BUT, so. I couldn't find it elsewhere, either, but I'm not exactly a genius...

Right there, as plain as day, are the functions of V1-V5. That was the last piece of the puzzle for my OP. I was pretty clear on V1 and V5 just from my own observations, but V2 through V4 just weren't apparent. Now I can roll tubes through the amp with confidence. So again, THANK YOU!

I noticed some other things in the manual that are probably relevant to my interests. I will probably have questions about some of those details later. You and Joey1970 have both hit upon the confusing bit about the difference between the MkIIA and MkIIB; the MkIIA effects loop is "primitive", whereas the MkIIB effects loop is "proper". I get it now.

I bought this amp more than 15 years ago from a session player in LA, for my son. He was into playing alt-rock and punk rock. He gave the amp to me a couple years back, but I haven't needed to use it until now. My #1 amp is a 1967 Deluxe Reverb, which is trapped in Canada due to the border closure. Fortunately, this amp has a really lovely clean sound going on, especially now that I've installed an AlNiCo speaker. I'm going to roll tubes, order a couple of parts (knobs and reverb tank bag and EQ knobs and...) and come back with questions about whatever I can't figure out on my own.

Again, thank you very much for your help; much obliged. :)
 

Latest posts

Back
Top