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I fix vintage guitar amps. I know blackface and silverface Fenders best by far. They are my favorite amps and I love to work on them. I also work on Marshalls, Hiwatts, Ampegs, some Gibsons, and some other stuff. I don't really like working on newer amps with PC board construction. They are just no fun and since I do this for fun...

Schematics!

This is by all means not a comprehensive list. This page also includes some useful notes on these amps.

Why I don't do mods to old amps.

 If you have a Deluxe Reverb, this is a really cool thing to try!

If you have a reissue Reverb Unit, check this out. You need to try this!

Parts Shop

Here are some parts:
Tubes: (If you don't know what tubes you need, go here.)
NOS JAN GE 12AX7WA
NOS JAN Philips 12AT7WC
NOS GE 12AT7 (standard replacement)
NOS JAN GE 5751
NOS JAN GE 12AY7WA/6072A
NOS JAN Philips 12AU7WA/6189(*)
Ruby Tesla 12AX7/ECC83
Ruby Ei 12AX7/ECC83 No longer available.
NOS JAN Philips 6V6GT (*)
Ruby6V6GTBC
Svetlana 6L6GC
Ruby 6L6GC STR
NOS JAN Philips 6L6WGB (*)
NOS JAN Philips 7581A/6L6GC (*)
Svetlana EL34
NOS 6K6GT
Chinese GZ34/5AR4
NOS Mullard GZ37 (not the same as GZ34)(*)
NOS JAN Philips/Sylvania 5Y3GT
NOS 5U4GB (Various brands)(*)
(Go here to read about Other Tubes.)

Filter Capacitors (all Sprague Atom axial):
16uf-475v
20uf-500v
80uf-450v
8uf-450v
8uf-150v
50uf-50v
100uf-100v
25uf-50v
25uf-25v
2uf-50v (for blackface/silverface Champs)
10uf-25v (for blackface/silverface Vibro-Champs)
(Click here to see what your amp uses.)

Can cap for Princeton and Champ:

Other parts:

Signal capacitors (Sprague (SBE) Orange Drop, Silver Mica, other)
CTS pots for Fender and other american amps
Alpha pots for amps (most values)
50k switching pot (for removing tremolo from circuit when off)
1 ohm 1% 3 watt resistors (for measuring bias via the cathode)
Accutronics reverb tanks for Fender amps (2 spring stock replacement)
Super/Pro/Bandmaster Reverb power transformer
Output Transformers
Tube sockets (power or preamp)
Carling power/standby switch
Bright switch
3 prong grounded power cord (for Fenders) (highly recommended for installation)
Switchcraft shorting jack (speaker or input)
Optoisolator for Fender blackface/silverface tremolo
Slo blo fuse (any size for Fender amp) (sorry, they are pricey little buggers!)
Fuse socket (Fender type)
Indicator Lamp
Indicator Lamp Jewel (blue, amber, green, red)
Official Machine Gun Purple Jewel!
Blackface amp knobs
Fender amp logos, blackface, brown, tweed: email me
Replacement Fender grill cloth and covering: email me

Speakers:
Weber VST currently makes my favorite speakers for Fender amps. I can get different kinds of speakers such as Celestion, Eminence, Fane and Mojo. Email me for prices and details. But don't ask me about speakers until you have visited Weber VST! I fully endorse their products and they are good people. For this reason I don't have a whole lot of experience with some of the other speakers listed. There is a wealth of information on guitar speakers at Weber VST. These people know what they are doing and will be able to help you better than I can.

Terms

Contact Info:
Machine Gun Amps

Some cool links. Table of Contents.  

Thanks:

There are some people I'd like to thank for help and guidance over the last few years that I've been active in amp repair (in no particular order): John Stokes, Evan Aurand, Ted Weber, Mark Norwine, Rob Livesey, Jeff G, Tim Swartz, Tom Crocker, Keith M, Dave Funk, Greg Gagliano, Terry Oubre, Dave Stork, Jack Price, Bob Clear, Paul C, Phil Loarie, Mike Steffes, Steve Watson,  Jay Rogers, Tom Pierce and I'm sure that there are others that I'm forgetting! If I did, be sure to email me and get on my case!

Thanks to the University of Arizona!
 
 

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All company and product names are presumed trademarks of their respective companies.

Last updated 7/20/01