Gallien-Kreuger 1001RB Bass Amp Input Jack Upgrade

Broken input jacks are a pain in the “ear.”  The replacement of switches and jacks is the bread-and-butter for the bench technician.  Let’s see if the Unbrokenstring Crew can take this otherwise-mundane repair to the next level! Looking inside, we see a big toroidal power transformer on the right, a power supply unit in the center,…

Noisy Volume Control in the Peavey XR-600B Mixer Amp

This honest, hard-working powered mixer lives in a music room, where all the musicians can plug in and hone their craft.  After all these years, the volume control has become dirty and intermittent.  The Unbroken String Crew realizes that this repair will be a wonderful opportunity to show an Old School method for repairing the…

Shure 555H Microphone Rebuild

Another well-worn road warrior from Dr. Shoen is on the bench for service.  The foam is shot.  The on/off switch is always in the ‘on’ position, regardless of what the switch says.  The Unbroken String Crew goes to work! The slide switch is under this cover.  I’m using a rag on the desk top to…