Welcome To the Hoffman Amplifiers Forum

September 06, 2025, 05:11:48 pm
guest image
Welcome, Guest. Please login or register.
-User Name
-Password



Hoffman Amps Forum image Author Topic: reverb issues ab763 circuit new build  (Read 2679 times)

0 Members and 1 Guest are viewing this topic.

Offline Tone Junkie

  • Level 3
  • ***
  • Posts: 861
Hoffman Amps Forum image
reverb issues ab763 circuit new build
« on: July 13, 2010, 12:41:53 pm »
I have a reverb tank from the music man I built this into but doesnt seem to work should. its an accutronic fb3a1b with a 1475 ohm input and a 2250 ohm out put what should I have to make this work or can I change some resisters and make this one work . Thank you Bill
PS is there a way to test the tank to see if it works

Offline sluckey

  • Level 5
  • *******
  • Posts: 5075
    • Sluckey Amps
Hoffman Amps Forum image
Re: reverb issues ab763 circuit new build
« Reply #1 on: July 13, 2010, 12:49:09 pm »
The AB763 reverb circuit needs an 8 ohm (or close) input on the tank.
A schematic, layout, and hi-rez pics are very useful for troubleshooting your amp. Don't wait to be asked. JUST DO IT!

Offline Tone Junkie

  • Level 3
  • ***
  • Posts: 861
Hoffman Amps Forum image
Re: reverb issues ab763 circuit new build
« Reply #2 on: July 13, 2010, 01:39:02 pm »
Thanks slucky I will order one right away. Bill

Offline sluckey

  • Level 5
  • *******
  • Posts: 5075
    • Sluckey Amps
Hoffman Amps Forum image
Re: reverb issues ab763 circuit new build
« Reply #3 on: July 13, 2010, 02:52:52 pm »
The original is pt# 4AB3C1B. Doug has them.  Follow the reverb link at the top of this page. It's the first one.
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


password