This is a link to the Hoffmanamps parts catalog
You can scroll through the images below using the Image scroll controls. You can also use the Left and Right arrow keys on your keyboard.
There are over 2500 Tube amp Schematics and other types of schematics in the EL34World Schematic library.
There is also a huge library of effects and solid state schematics.
If you see a schematic out of place, please email me so I can fix the problem.
If you have a Tube Amp schematic that is not listed and would like to submit it, please follow the instructions at the bottom of this page
Click on the buttons below to go to each Schematic Index page
How to submit a schematic file to the library
Your schematic should be a schematic that Tube amp builders would want.
There is no need to submit a schematic for a 1960s TV set
Please look at the library first to see if the schematic is already in the library
If you have a better quality file than what is in the library, you can send the file
Please follow these file name guide lines
No spaces in the filename. Please use the underscore character instead of a space.
Wrong =
gibson ga5.pdf
Correct =
gibson_ga5.pdf
The brand name should be the first part of the file name.
Wrong =
ga5.pdf
Correct =
gibson_ga5.pdf
Email me using the email link at the bottom of this page to submit a schematic to the library.
You can attach your schematic file to the email
Please make sure you have followed the file name guide lines above.
The Tube amp Schematics and Tube amp Layout diagrams in the Library are mostly Adobe PDF files.
You must have Adobe reader installed to view a PDF file.
You can download Adobe PDF reader for free
here.
