Peavey MX Combo Amp Rescued from a Bad Amp Tech

This combo amp had lived a hard life and had finally quit.  Grandpa wanted his grandson to get the amp fixed so that they could jam together again.  Could The Unbrokenstring Crew bring this unit back to life?  We begin with a quick tour of the rear panel.  The ground switch is a tip of…

Crate Vintage Club 30 Recap

Robin had another of these wonderful Crate combo amps for servicing.  The Unbrokenstring Crew knew just what to do! Robin’s 50 watt combo was serviced earlier, in this blog post: https://www.unbrokenstring.com/crate-vintage-club-50-amp-repair/   This is a 30 watt unit, with very similar construction.  Look at all that St. Louis Music goodness!   The loudspeaker is 100%…

Peavey 260 Booster Amp Needs a Boost

A local church has a rack of Peavey gear that drives their public address system.  This unit had failed.  A phone call to The Unbrokenstring Crew was all that was needed to get this unit onto the operating table. Unlike a traditional guitar amp or stand-alone amplifier, this unit takes high level signals and buffers…

Jasmine Classical Guitar Needs a Setup

Sophia’s classical guitar had developed a buzzing string.  Perhaps the humidity changes had changed the geometry of the instrument.  She immediately called The Unbrokenstring Crew to take a look at it! This instrument has a truss rod, something a little out of the ordinary for classical guitars.   This is an Indonesian instrument, with lots…

Mesa Boogie Bass 400 Repair and Refurbishment

Craig was very proud of his rack-mount tube-powered bass amp.  But there were crackles and pops while playing.  He wanted to have everything looked-at.  Could The Unbrokenstring Crew get it tuned up? This is a heavy monster.  Yes, that implies 400 watts out.   These are the tubes that were still alive.  We’re missing a…

Epiphone Dot Gets a Customized Bigsby Tremolo

Matt with My Twilight Pilot lusted for a black Epiphone Dot with a Bigsby tremolo assembly. Could the Unbrokenstring Crew rise to the occasion and make it happen? It don’t get mo’ prettier than this!   The Bigsby needs a small modification, so that the tremolo bar can swing over the strings.  Here, the Bigsby…

Peavey KB4 Keyboard Amp Disintegrating

This Peavey keyboard amp works intermittently, but the modular AC outlet has completely come loose from the rear panel. Can the Unbrokenstring Crew fix this? This unit is pretty cool, with a built-in luggage roller and extendable handle as standard equipment from the factory.   The modular AC plug was covered in RTV rubber.  Was…

Intermittent Ashdown EVO III 500 Bass Head

This head was soldiering away in the studio when the output signal became distorted.  Can the Unbrokenstring Crew un-distort the output and keep it from happening again? Stock photo credit: Ashdown Engineering   Name, rank and serial number, please.   The oscilloscope shows the waveform presented across an eight ohm resistive load.  A sinewave is…