The Amp Doc in Franklin
Got noise?
Getting zapped?
No power?
No output?
It's time for a visit to The Amp Doc!
WZUP? Just converted an old Traynor tube PA head to a Marshall JCM800 2204 circuit. The results have blown us away! Check out the video at youtube.com Available for sale.
Welcome to The Amp Doc
Guitar Amp Sales and Repair Services
Specializing in the restoration, repair and sale of cool "vintage" guitar gear and other various sundries!
The Amp Doc is located in Franklin MA, one minute off route 495 King Street exit 41.
Contact me at misterc57@gmail.com if you are looking to buy, sell, trade or need a repair.
I buy old amps (guitar or audio) and old guitar pedals in “any” condition. Single items or large lots.
Gear for sale can be seen at the following links on Craigslist and Facebook.
SERVICES
TESTIMONIALS
"Mark, The old Silvertone sounds better than ever. Thanks for doing such a great job on it." (Dave K. 1960s Silvertone 1484 restoration)
"Thanks for the fantastic job getting these refurb amps up to insane tone monsters... Will be using them both for the Worcester Music Awards show next Wednesday. I'm extremely happy with the results you got me." (Mike M. 1960s Bassman and Pro Reverb restoration)
"I brought in a 1960 Gibson Discoverer Tremolo amp that lost power on me after 40 years. Also the trem wasn't working anymore. The Amp Doc (Mark) not only fixed everything but it sounded better than I ever remembered. I'm definitely bringing my stuff here from now on." (Sam Spinazzola Upton, MA. 1960s Gibson Tweed GA-8T)
"I own several Peavey Classic 50 combos and heads that date back to the early and mid 90's that still have the original filter caps. Mark has done the replacements on two of them so far and I'll be having him do the rest of them. Also had one with no output that Mark repaired for me. His work is professional, he uses only high quality replacement parts, and his pricing beats anyone else in the area. If you're serious about your amp and you demand a lot out of it, you can trust Mark to keep it working and sounding its best. I won't bring my amps to anyone else." (Jimmy Pircio)
FEATURED SERVICES AND GEAR FOR SALE
With rare exception I am no longer servicing 90s or newer printed circuit board (PCB) based amps.
Gear for sale can be seen at the following links on Craigslist and Facebook. Send me an email if you are looking for something not listed. I have lots of gear available for sale that is not listed and in all price ranges.
Traynor-Marshall JCM800 2204 Conversion (See Video) - $1197
This is one of a kind with an impressive sound.
This is a c.1970 Traynor YVM-1 head that I converted to a Marshall JCM800 2204 circuit.
The LO input sounds like a JCM800 while the HI input sounds like a JCM800 on steroids
This is a loud 50 watt all tube amp taking advantage of the vintage Traynor quality and transformers with point to point eyelet wiring.
The tube line up is the same as a JCM800 2204 with (3) 12AX7 and (2) EL34.
Back panel not pictured is included.
Video of the HI input available at youtube.com
Vintage Fender Vibro Champ Blackface Circuit Drip Edge c.1969 - SOLD
Has the same AA764 circuit as the older Blackface models. These were only made for two year during the CBS transition.
New 3 prong cord, death cap removed, new EH output tube.
Very Rare 1960 DeArmond (Rowe) Guitar Amplifier Model R25T - $2700
Just completed restoration, any part needed was replaced including a new Hammond power transformer, filter capacitance, bias supply and 3 prong AC cord.
Includes the original Jensen P10Q 10" alnico speakers and the original tremolo footswitch.
Priced well below online prices.
Gibson Tweed GA-8T Discoverer Tremolo c.1960 - $697
Rare to find, collectible, sounds amazing and great tremolo. Read reviews online.
Completely taken apart, cleaned and serviced.
New upgraded filter caps, coupling caps and an upgraded vintage Hammond output transformer. 3 prong AC cord installed. Anything needed was replaced.
Some rust on the faceplate and staining on the blonde tweed tolex. Has a home-made back panel.
Cabinet is solid! Includes the original tremolo footswitch.
Dynaco Stereo 35 Audio Tube Amp with New VTA Driver Board - $697
Just off the bench (July 2025) with a new matched quad of Russian output tubes.
All original circuit with the addition of an on/off switch and a pilot light.
Includes the cage.
Currently using it in my office. Come and hear it. Powerful for its size.
Vintage 1960 Carnival All Tube Amp Fender Champ Conversion Mini Head - $397
This is an all tube point to point wiring c.1960 Realistic Carnival Tube Amp head that I just gutted (July 2025) and built based on the Fender Champ AA764 circuit.
The results are fantastic with a blues crunch head that is very pick and volume responsive that can get very tube saturated and can get pretty loud for its size. Class A circuit putting out around 6 watts.
The tube line up is 12AX7, 6V6GT, 6X5GT. All vintage tubes.
Knobs left to right are Volume, Treble, Bass (On/Off)
Switchable 4 ohm and 8 ohm output.
Includes the cage.
Items I am looking to buy...
Dynaco tube amps in need of repairs.
Broken tube amps. Prefer 1970s or older.
Broken effect pedals. Prefer 1980s or older.
Tube testers.
Do not throw it out! I take donations of un-needed, forgotten or broken gear (instruments, amps, parts, tubes, test and repair equipment) for restoration or re-purpose. Easy drop off location in Franklin or I can pickup.
Recent repairs...
ADA MP-1 - Install battery holder and new 3V battery
Airline Tube Combo - Non working restoration
Ampeg Gemini VI - Replace bias, filter caps and 3 prong AC cord
Ampeg Jet J-12 Tube Combo c.1960 - Non working restoration
Bugera 333XL - No power
Carvin VTX100 Head - Replace filter caps
Danelectro Centurion Model 272 c.1960 - No output
DeArmond (Rowe) Guitar Amp Model R25T - Non working restoration
Dynaco Stereo 70 - Non working restoration
EHX Big Muff (Vintage) - New jacks, stomp switch, battery clip
ENGL Savage 60 - No output
Fender Bassman Tweed 1958 - Non working restoration
Fender Bassman 50 Blackface - Non working restoration
Fender Bassman 50 Silverface - Replace power supply caps, install 3 prong AC cord
Fender Bassman Ten 1972 - Repair noise issues
Fender Bassman Ten 1971 - Replace bias, filter caps and 3 prong AC cord
Fender Blues JR Mexico - No output
Fender Blues JR USA - Replace input jack
Fender Blues JR - No output
Fender Deluxe Reverb - Non working restoration
Fender Deluxe Reverb Black Face c.1960s - Replace bias, filter, cathode bypass caps
Fender Dual Showman Head 1960s Blackface - Non working restoration
Fender Hot Rod Deluxe - Non working input jack
Fender Princeton Reverb Blackface - Non working restoration
Fender Princeton Reverb Blackface - Non working restoration
Fender '68 Custom Princeton Reverb – No output
Fender Pro Reverb Blackface - Non working restoration
Fender Pro Reverb Silverface - Intermittent reverb
Fender Super Reverb - No output
Fender Vibro Champ Blackface c.1960s - Non working restoration
Fender Vibro Champ Silverface c.1969 - Non working restoration
Gallien-Krueger 200MB - Replace input jack
Gibson EH-185 c.1940 - Non working restoration
Gibson GA-8T Discoverer c.1960 - Non working restoration
Gibson G30 Combo - Install 3 prong AC cord
Hartke 3500 - Replace pots and jacks
Hiwatt Custom 100 - Repair noise issues
Heathkit W5M - Recap
Laney Pro-Tube AOR - New input jack, tune up
Marshall 2555 - Blowing HT fuse
Marshall DSL15H - No Output
Marshall DSL40C - New tubes and bias
Marshall G100RCD - Replace pots and jacks
Marshall G80RCD - Replace pots and jacks
Marshall JCM800 - Replace gain channel pot and new input jack
Marshall JCM900 - Replace pots
Marshall JCM900 - Service tune-up
Marshall JCM900 - Service tune-up
Marshall JCM2000 - No power
Marshall VS15 - No output
Marshall VS65R Combo - Repair channel switching
Marshall Valvestate 80V 8080 - Repair noise issues
Mesa Boogie Studio Tube Combo - Noisy Pots
Monoprice 5W Tube Combo - Hum
Oahu c.1930s Combo - Non working restoration
Orange Rockerverb 100 - Re-tube, set bias
Peavey 5150 - No output
Peavey 6505+ 112 - No power
Peavey Classic 30 - No output
Peavey Classic 50 - No output
Peavey Classic 50 - Replace filter caps
Peavey Deuce II - No output
Peavey Rockmaster Preamp - Repair low output
Peavey Triumph 120 - No channel switching
Peavey Ultra 60 - No output
Peavey XXX - Tune up
Realistic Carnival c.1960 - convert to Fender Champ circuit
Silvertone 1333 - Non working restoration
Silvertone 1433 - Non working restoration
Silvertone 1482 - Install 3 prong AC cord
Silvertone 1484 - Non working restoration
Selmer Zodiac 50 - Filter, bias caps, output tubes, 3 prong AC cord
Traynor YBA-1 Bass Master - Non working restoration
Traynor YBA-2B Bass Mate - Non working restoration
Traynor YBA-3 Bass Head - Non working restoration
Traynor YGM-3 Guitar Mate - Non working restoration
Traynor YSR-1 - Non working restoration
Traynor YVM-1 Voice Mate - Non working restoration
Univox U-1061 - No output
Univox U45-B All Tube Combo c.1960 - complete restoration
Vox AC10C1 - No output
Vox AC15H1TV - Noise issues
Marshall Guvnor - Replace Jacks
TERMS
Diagnostics fee ranges from $20 to $60 and is waived if repair is authorized.
60 day warranty on all repairs.
Items not picked up within 30 days of completion will incur a storage fee of $1 per day.
CONTACT
I am located one minute off Route 495 exit 41 (King St) in Franklin MA.
All sales and services by appointment. Contact Mark "The Amp Doc" at...
Phone: (508) 922-1690
Email: misterc57@gmail.com