Welcome To the Hoffman Amplifiers Forum

September 06, 2025, 02:35:14 pm
guest image
Welcome, Guest. Please login or register.
-User Name
-Password



Hoffman Amps Forum image Author Topic: Revisit- Fender Super Twin- New Project  (Read 3095 times)

0 Members and 1 Guest are viewing this topic.

Offline pbman1953

  • Level 3
  • ***
  • Posts: 1091
Hoffman Amps Forum image
Revisit- Fender Super Twin- New Project
« on: December 08, 2022, 05:22:20 pm »
The Super twin has been working fine but I have 1 gain question. At the front end on V1-pin 8 I replaced the 750/3v to a 10 uf. I seemed to have lost some gain and attack. Should I go back to the 750 or change to another value?

Offline sluckey

  • Level 5
  • *******
  • Posts: 5075
    • Sluckey Amps
Hoffman Amps Forum image
Re: Revisit- Fender Super Twin- New Project
« Reply #1 on: December 08, 2022, 05:59:59 pm »
yes
A schematic, layout, and hi-rez pics are very useful for troubleshooting your amp. Don't wait to be asked. JUST DO IT!

Offline pbman1953

  • Level 3
  • ***
  • Posts: 1091
Hoffman Amps Forum image
Re: Revisit- Fender Super Twin- New Project
« Reply #2 on: December 08, 2022, 06:04:16 pm »
ok, thanks

Offline pbman1953

  • Level 3
  • ***
  • Posts: 1091
Hoffman Amps Forum image
Re: Revisit- Fender Super Twin- New Project
« Reply #3 on: December 09, 2022, 06:41:28 am »
I still have the original white 750 polarized cap. Should I use it or replace due to its age?

Offline sluckey

  • Level 5
  • *******
  • Posts: 5075
    • Sluckey Amps
Hoffman Amps Forum image
Re: Revisit- Fender Super Twin- New Project
« Reply #4 on: December 09, 2022, 07:17:04 am »
yes
A schematic, layout, and hi-rez pics are very useful for troubleshooting your amp. Don't wait to be asked. JUST DO IT!

Offline pbman1953

  • Level 3
  • ***
  • Posts: 1091
Hoffman Amps Forum image
Re: Revisit- Fender Super Twin- New Project
« Reply #5 on: December 09, 2022, 07:38:36 am »
Thanks, just to be sure. This is a 750 uf?

Offline sluckey

  • Level 5
  • *******
  • Posts: 5075
    • Sluckey Amps
Hoffman Amps Forum image
Re: Revisit- Fender Super Twin- New Project
« Reply #6 on: December 09, 2022, 07:46:45 am »
Hey, you didn't ask permission to remove it. You don't need permission to put it back.  :wink:
A schematic, layout, and hi-rez pics are very useful for troubleshooting your amp. Don't wait to be asked. JUST DO IT!

Offline pbman1953

  • Level 3
  • ***
  • Posts: 1091
Hoffman Amps Forum image
Re: Revisit- Fender Super Twin- New Project
« Reply #7 on: December 09, 2022, 07:48:20 am »
True, just want to be sure if the value in in"uf"


Thanks!

Offline sluckey

  • Level 5
  • *******
  • Posts: 5075
    • Sluckey Amps
Hoffman Amps Forum image
Re: Revisit- Fender Super Twin- New Project
« Reply #8 on: December 09, 2022, 07:59:14 am »
yes
A schematic, layout, and hi-rez pics are very useful for troubleshooting your amp. Don't wait to be asked. JUST DO IT!

Offline pbman1953

  • Level 3
  • ***
  • Posts: 1091
Hoffman Amps Forum image
Re: Revisit- Fender Super Twin- New Project
« Reply #9 on: December 09, 2022, 08:00:03 am »
Thanks!!!

Offline sluckey

  • Level 5
  • *******
  • Posts: 5075
    • Sluckey Amps
Hoffman Amps Forum image
Re: Revisit- Fender Super Twin- New Project
« Reply #10 on: December 09, 2022, 08:02:36 am »
You know, that was answered back in August.
A schematic, layout, and hi-rez pics are very useful for troubleshooting your amp. Don't wait to be asked. JUST DO IT!

Offline pbman1953

  • Level 3
  • ***
  • Posts: 1091
Hoffman Amps Forum image
Re: Revisit- Fender Super Twin- New Project
« Reply #11 on: December 09, 2022, 08:05:50 am »
well, your memory is better than mine :icon_biggrin:

Offline pbman1953

  • Level 3
  • ***
  • Posts: 1091
Hoffman Amps Forum image
Re: Revisit- Fender Super Twin- New Project
« Reply #12 on: December 09, 2022, 03:04:37 pm »
I've looked at many other bass amp front ends. Traynor and Sunn both use 220uf for that position. Fender has used 25 and 220.


I have a 220 and a 330. Will the 750 be that much different? I'm coming from a 10

Offline sluckey

  • Level 5
  • *******
  • Posts: 5075
    • Sluckey Amps
Hoffman Amps Forum image
Re: Revisit- Fender Super Twin- New Project
« Reply #13 on: December 09, 2022, 03:15:22 pm »
Just do it!
A schematic, layout, and hi-rez pics are very useful for troubleshooting your amp. Don't wait to be asked. JUST DO IT!

Offline pbman1953

  • Level 3
  • ***
  • Posts: 1091
Hoffman Amps Forum image
Re: Revisit- Fender Super Twin- New Project
« Reply #14 on: December 09, 2022, 04:40:03 pm »
Well I tried the 220 , 30 & old 750.


The old 750 did have the best attack. I stayed with the 330 because it was close and new. Otherwise I can put the 750 back in


 


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