AMPTECHNICAL IS A WESTERN MASSACHUSETTS-BASED ELECTRONICS REPAIR SERVICE FOR YOUR TUBE AND SOLID-STATE AMPLIFIERS.
** 60-DAY WARRANTY ON SERVICES PROVIDED **
** 60-DAY WARRANTY ON SERVICES PROVIDED **
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Services, $72/hr
Diagnose: No sound, no lights, buzzing, humming, ticking, blue tubes, blown fuses, smoke, intermittent issues, broken or non-functional switches and controls, I CAN FIX IT. Soldering work (MIL-SPEC standard) Test Tubes: $3/tube. Biasing and Tube Replacement: $50-75 Scope tested using factory settings or (61% Max Plate Dissipation + Lowest Harmonic Distortion) Replace Electrolytic Filter Capacitors: $72/hr, 2.5hrs typical NAME BRAND PARTS ONLY. Clean/Install Jacks, Pots, Switches, Sliders, tube sockets, pilot lights and knobs: Alpha, Bourns, and Allen Bradley IN STOCK (if special order add 1-2wks) ***Oscilloscope Diagnostics and Full Bill of Health: All amplifiers are Checked under a specified or maximum load with an oscilloscope before they receive a functional bill of health. Testing is currently achieved using several input wave forms and a calibrated HP 2245 Scope, running the 'warmed' amp to max power with sine wave for a few minutes while watching the current draw, bias, plate and screen voltages. Finally, it is played with a real instrument and/or musical input source. Other Services Hand-wired and Circuit board amps 3-Prong Power Cord Conversions Star Grounding & Buss Wire Ground setups Fender Silverface to Blackface conversions Custom modifications installed or removed. Tone caps to output transformers, 3 prong grounded power cords, Amp kits and upgrades by Fromel, BillM, and others. What I Service
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Got Hum or Power Issues? Some Capacitors are Junk when New. 
Mesa Mark II on the Bench, Dec. 2016 (Before Repairs). 
A 1976 Fender Vibrolux Reverb, restored in 2016 and sold on Ebay. |
Large Selection of Quality Replacement parts IN STOCK and growing each week!
85% of capacitor replacements and Tube Biasing Services are finished and returned to the customer in
7 days or less.
12ax7/12at7/12au7/7025/5881/6L6/E34L/EL34/EL84, 5U4GB/GZ34 tubes are here ready for your amp. Many Fender and Marshall parts in stock and on the way.
85% of capacitor replacements and Tube Biasing Services are finished and returned to the customer in
7 days or less.
12ax7/12at7/12au7/7025/5881/6L6/E34L/EL34/EL84, 5U4GB/GZ34 tubes are here ready for your amp. Many Fender and Marshall parts in stock and on the way.
Symptoms your amp may have, and what I'll do first:
- 60 Cycle Hum - look for a pinched filament wire or pilot bulb wire, loose ground wire. Any source before the rectifier.
- 120 Cycle Hum - Test the filter caps for leakage/end of service life.
- Scratching, Popping, Intermittent Signal, occurs when turning knobs or moving sliders and switches - Reconditioning of mechanical parts. In some cases, this path leads to a fork in the road. I have taken good time to open up the potentiometer and clean the brush and carbon track by hand, in order to maintain the value of a special vintage piece. It usually takes 25 min to do this. It is preferred for most customers to replace the pot, as a great deal of time is saved and the amp or device's function will be the same.
- Amp Echoes after note is played - Test preamp tubes for microphonics
- Amp "plays" other vibrations in the room - Test preamp tubes for microphonics
- Greater than normal Hiss coming from speakers - check power tube bias, then filter and coupling caps
- Hot Tubes - Test bias and coupling caps for leakage to grid.
- High Frequency Noise - Test tubes, check for modifications, observe feedback circuit. Scope for HF oscillations
- Low Power, Loss of Power - Check Power Supply Voltages, starting at rectifier. Signal trace through each gain stage.
Things I Love.
Quality, Excitement, and Thrill.
Quality is a remnant of Conscious Manufacture.
It is the Metaphysical imprint in the work. An Artist Signature.
I believe that Life is meant to be lived by climbing mountains,
instigating the progress of your own destiny.
Resulting Experience is Dynamic.
Music is Personal.
/ \ / \/WAVEFORM- - -
Quality, Excitement, and Thrill.
Quality is a remnant of Conscious Manufacture.
It is the Metaphysical imprint in the work. An Artist Signature.
I believe that Life is meant to be lived by climbing mountains,
instigating the progress of your own destiny.
Resulting Experience is Dynamic.
Music is Personal.
/ \ / \/WAVEFORM- - -
This is a Smart Restoration and Tune Up when you need it.
-Rich Audio
-Rich Audio