Welcome To the Hoffman Amplifiers Forum

September 06, 2025, 01:30:43 pm
guest image
Welcome, Guest. Please login or register.
-User Name
-Password



Hoffman Amps Forum image Author Topic: Mesa Boogie Mark II Coliseum Reverb Hookup and other questions  (Read 2044 times)

0 Members and 1 Guest are viewing this topic.

Offline markmalin

  • Level 3
  • ***
  • Posts: 827
  • Malin Sweet Loraine
    • Malin Amplification
Hi all


I'm working on an early 80's Mesa Coliseum and don't have the enclosure, but I want to test the reverb.  I plan to just hook up the reverb from a Fender just to see if it works, but am confused about where the jacks are for the reverb.  I'm assuming it is the 2 RCA jacks on the top of the chassis, one labeled "Rev" and one "White", but I see another jack as well that looks somewhat like an RCA so am not sure.


Also, is it standard that this should be drawing nearly an amp of current while idling?


Thanks
mark
"... there are Flying V's and then there are the ones shaped like peanuts..."  - my son at age 9

Offline shooter

  • Level 5
  • *******
  • Posts: 11013
  • Karma Loves haters
Hoffman Amps Forum image
Re: Mesa Boogie Mark II Coliseum Reverb Hookup and other questions
« Reply #1 on: March 28, 2023, 11:09:09 am »
tracing the wires, while looking at the schematic always lead me to the proper configuration, always double check yourself  :icon_biggrin:


add up all the filaments current, see if it gets you close to an amp
Went Class C for efficiency

Offline markmalin

  • Level 3
  • ***
  • Posts: 827
  • Malin Sweet Loraine
    • Malin Amplification
Hoffman Amps Forum image
Re: Mesa Boogie Mark II Coliseum Reverb Hookup and other questions
« Reply #2 on: March 28, 2023, 11:11:25 am »
I know.  I'm waiting on a schematic from Mesa...  it's just an unfamiliar chassis to me, that's all.  I'll figure it out
"... there are Flying V's and then there are the ones shaped like peanuts..."  - my son at age 9

Offline sluckey

  • Level 5
  • *******
  • Posts: 5075
    • Sluckey Amps
Hoffman Amps Forum image
Re: Mesa Boogie Mark II Coliseum Reverb Hookup and other questions
« Reply #3 on: March 28, 2023, 12:16:06 pm »
There's a Mark II schematic in Hoffman's schematic library.
A schematic, layout, and hi-rez pics are very useful for troubleshooting your amp. Don't wait to be asked. JUST DO IT!

 


Choose a link from the
Hoffman Amplifiers parts catalog
Mobile Device
Catalog Link
Yard Sale
Discontinued
Misc. Hardware
What's New Board Building
 Parts
Amp trim
Handles
Lamps
Diodes
Hoffman Turret
 Boards
Channel
Switching
Resistors Fender Eyelet
 Boards
Screws/Nuts
Washers
Jacks/Plugs
Connectors
Misc Eyelet
Boards
Tools
Capacitors Custom Boards
Tubes
Valves
Pots
Knobs
Fuses/Cords Chassis
Tube
Sockets
Switches Wire
Cable


Handy Links
Tube Amp Library
Tube Amp
Schematics library
Design a custom Eyelet or
Turret Board
DIY Layout Creator
File analyzer program
DIY Layout Creator
File library
Transformer Wiring
Diagrams
Hoffmanamps
Facebook page
Hoffman Amplifiers
Discount Program