Amplifier Repair and Maintenance

When it comes to amplifier repair, AM Guitar Works does not discriminate! Service is available on all makes and models of amplifiers, tube or solid state.

There is a $75 + tax minimum bench fee for amplifier and other electronic repairs.  We collect this non-refundable deposit when you drop off your amplifier. This covers the first hour of labor which includes diagnosis and some simple repairs. Any additional parts or labor will be paid at time of pick up. Labor after the first hour is billed at $75 per hour in 15 minute increments.

Estimates - We are happy to provide estimates and strive to be as accurate as possible. This is included with the $75 deposit mentioned above should you request it. Major repairs and restorations of some vintage amps are sometimes difficult to give an accurate estimate, as we don't know what we'll run into once the amp is up and running. In these cases we will discuss what your budget is and work from there.

Below is a short list of amplifier maintenance packages available. Other repairs will be quoted on a case by case basis. All amplifiers are repaired locally in our shop.

A benefit of having your amplifier serviced with AM Guitar Works is once your amplifier has been repaired, we'll test it for at least one session of lessons before considering it ready to go.  This gives us the opportunity to test the amp by playing on it for 3 - 5 hours to make sure everything is working properly. 

 

Tube Amp Tune Up

If it's been awhile since your tube amplifier has been serviced, it will most likely benefit from a tune up. High voltage, heat, and age can cause components to change value or fail. If your amplifier seems to have lost tone or power, it needs to be tuned up.  The above picture shows the inside of a Fender 1963 Tremolux amplifier.  The red seals on the electrolytic capacitors are blistered due to the caps leaking and they should be replaced.

AM Guitar Works will perform a “tune up” on your tube amp. Single channel “practice amp” starts at $75 + parts. Dual channel combo amp or larger typically start at $150 plus parts. Final price will depend on amount of time and materials required. This includes the following:

  • Check all tubes and replace as necessary. Power tubes are replaced with matched sets. Tubes that test good will not be replaced unless requested by customer. We stock and use JJ tubes unless otherwise requested. We have found these tubes to be high quality and best tone and reliability for the value. We have several other brands available as well if you prefer something different. Please note—If you wish to provide your own tubes, please bring them in with the amplifier. We will not pull our tubes after we have installed them so you can replace with your own.
  • Clean and re-tension tube sockets.
  • Adjust power tube bias.
  • Clean input and output jacks.
  • Clean and check potentiometers (controls) and replace as necessary.
  • Check fuse size and replace if out of spec (safety check).
  • Check power supply filter capacitors and replace if necessary.
  • Check coupling capacitors and replace as necessary.
  • Check resistors and replace if out of tolerance.
  • Check reverb unit and repair if necessary.
  • Check and clean speaker connections. Tighten if necessary.
  • Clean inside of chassis.
  • Check operation of amplifier—Once your amplifier has been repaired, we typically run it through a session of guitar lessons (usually around 4 hours) before considering it ready to go. Amplifiers—especially tube amplifiers—can sometimes have hidden issues that aren't apparent in a typical bench test. This is an advantage of having your amp repaired at AM Guitar Works. Using this process has saved customers from having to bring amplifiers back for further work.

A tune up includes cleaning and checking the most critical parts of your amplifier's circuitry. Tubes and filter capacitors are checked and replaced as needed. Components that have failed or that are no longer in tolerance are replaced.

Solid State Amp Tune Up

 

Solid state amplifiers are more stable than tube amps, but can still require maintenance. If the controls are scratchy sounding or the sound cuts out, it may just need a “tune up”. Price starts at $75 plus parts. Final price will depend on amount of time and materials required. This includes the following:

  • Clean and check input and output jacks.
  • Clean and check potentiometers (controls). Replace as necessary.
  • Check fuse size and replace if out of spec.
  • Check reverb unit and repair if necessary.
  • Check and clean speaker connections. Tighten if necessary.
  • Clean inside of chassis.
  • Check operation of amplifier.

 AM Guitar Works - 5259 Jersey Ridge Road, Davenport, IA 52807 - Phone 563-370-6810 - email amguitarworks@mchsi.com