Welcome To the Hoffman Amplifiers Forum

September 08, 2025, 09:26:48 am
guest image
Welcome, Guest. Please login or register.
-User Name
-Password



Hoffman Amps Forum image Author Topic: Prinston Rev II Boost  (Read 3315 times)

0 Members and 1 Guest are viewing this topic.

Offline rake

  • Level 2
  • **
  • Posts: 301
  • I love Tube amps
Hoffman Amps Forum image
Prinston Rev II Boost
« on: April 29, 2018, 01:45:15 pm »
On the Princeton Rev II Boost schematic  there's 2 optocouplers # 013556

http://el34world.com/charts/Schematics/files/fender/Fender_princeton_rev_II_boost.pdf

Anyone know where to find them or suitable replacements?

Thanks in advance
Solid state has no soul........

Offline sluckey

  • Level 5
  • *******
  • Posts: 5075
    • Sluckey Amps
A schematic, layout, and hi-rez pics are very useful for troubleshooting your amp. Don't wait to be asked. JUST DO IT!

Offline rake

  • Level 2
  • **
  • Posts: 301
  • I love Tube amps
Hoffman Amps Forum image
Re: Prinston Rev II Boost
« Reply #2 on: April 29, 2018, 02:53:36 pm »
Solid state has no soul........

Offline sluckey

  • Level 5
  • *******
  • Posts: 5075
    • Sluckey Amps
Hoffman Amps Forum image
Re: Prinston Rev II Boost
« Reply #3 on: April 29, 2018, 03:39:00 pm »
 :thumbsup:
A schematic, layout, and hi-rez pics are very useful for troubleshooting your amp. Don't wait to be asked. JUST DO IT!

Offline MFowler

  • Level 2
  • **
  • Posts: 239
Hoffman Amps Forum image
Re: Prinston Rev II Boost
« Reply #4 on: May 01, 2018, 05:00:55 am »
Just a reminder Doug Hoffman sells those vactrols, I bought 4 from Doug.

Offline rake

  • Level 2
  • **
  • Posts: 301
  • I love Tube amps
Hoffman Amps Forum image
Re: Prinston Rev II Boost
« Reply #5 on: May 01, 2018, 06:38:56 am »
Just a reminder Doug Hoffman sells those vactrols, I bought 4 from Doug.

I looked in Doug's store first and didn't see them.  :dontknow:
Solid state has no soul........

Offline sluckey

  • Level 5
  • *******
  • Posts: 5075
    • Sluckey Amps
Hoffman Amps Forum image
Re: Prinston Rev II Boost
« Reply #6 on: May 01, 2018, 06:57:52 am »
If you want some better get them while you can. They are no longer being manufactured.
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