Fender 1965 Bandmaster
This Fender 1965 Bandmaster amplifier was completely gone through before going to a studio.
Fender 1973 Deluxe Reverb
This 40+ year old example of the Silverface era of CBS Fender came into the shop with a reverb and vibrato issue.
Bias Mods
Changing the stock fixed bias, found in many amplifiers, to an adjustable fixed bias has several potential benefits.
Tube Matching and Grading
This project consisted of testing tubes for a client. The tubes came from Europe and were manufactured during the end of the Cold War. With the tubes being used in a cathode bias (self bias) amplifier, it was important to match the tubes as closely as possible.
Marshall JCM900 SLX
The JCM900 SLX signifies Marshalls last evolution of the JCM800 Master Lead Series Amplifiers.
Music Man 130HD
The Music Man amplifiers are an interesting blending of solid state and vacuum tube technology.
Some Amplifiers That Have Passed The Bench
A collection of amplifiers that have recently crossed the bench.
Marshall JCM2000 DSL/TSL100 Bias Drift Issue
The early versions of the JCM2000 were prone to an issue that has been coined the “bias drift” issue. It’s been discussed at length on countless fan forums and since around mid-2004 the issue was resolved in manufacturing by Marshall.
Ampeg V4 Restoration
Desert Amplifier Repair Specializes in Ampeg V4 Service and Restoration, with dozens of V series amplifiers having been on the bench.
Creative illustration
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