Welcome To the Hoffman Amplifiers Forum

September 06, 2025, 01:04:48 pm
guest image
Welcome, Guest. Please login or register.
-User Name
-Password



Hoffman Amps Forum image Author Topic: hi - low input  (Read 2131 times)

0 Members and 1 Guest are viewing this topic.

Offline joesatch

  • Level 3
  • ***
  • Posts: 698
  • save me from myself.
Hoffman Amps Forum image
hi - low input
« on: December 09, 2023, 12:03:47 am »
trying to wrap my head around these inputs. they both look the same (as far as level). just two separate inputs not one higher than the other?

Offline sluckey

  • Level 5
  • *******
  • Posts: 5075
    • Sluckey Amps
Hoffman Amps Forum image
Re: hi - low input
« Reply #1 on: December 09, 2023, 12:08:44 am »
A schematic, layout, and hi-rez pics are very useful for troubleshooting your amp. Don't wait to be asked. JUST DO IT!

Offline Latole

  • Level 4
  • *****
  • Posts: 2522
Hoffman Amps Forum image
Re: hi - low input
« Reply #2 on: December 09, 2023, 04:00:15 am »
All great informations Sluckey , thanks


Offline Jonas

  • Level 2
  • **
  • Posts: 129
  • I love Tube amps
Hoffman Amps Forum image
Re: hi - low input
« Reply #3 on: December 20, 2023, 11:03:44 am »
How is everyone doing the physical connections for the 2 68K resistors? Are the putting the resistors at the jacks or at the tube socket? Got any recommendations for mechanically supporting the 2 resistors where they connect?

Offline sluckey

  • Level 5
  • *******
  • Posts: 5075
    • Sluckey Amps
Hoffman Amps Forum image
Re: hi - low input
« Reply #4 on: December 20, 2023, 11:48:47 am »
I can't speak for everyone, but this is how Leo did it and he built a lot more of these than everyone else...

A schematic, layout, and hi-rez pics are very useful for troubleshooting your amp. Don't wait to be asked. JUST DO IT!

Offline JPK

  • Level 2
  • **
  • Posts: 253
Hoffman Amps Forum image
Re: hi - low input
« Reply #5 on: December 20, 2023, 12:09:50 pm »
Thanks for the question. That was a nice little lesson on inputs.
I love tubes

 


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