Marshall JCM900 Tune Up

This wonderful old Marshall JCM900 lives in a recording studio. It was due for a set of tubes and a million-mile checkup. Could the Unbrokenstring Crew refresh this head and resolve the tiny issues that had arisen over the years?   In simple terms, this head has two channels that share a common tone stack,…

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%…

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…

Peavey Artist Combo Amp Refurb

This Peavey Artist combo amp was WAY too distorted to suit even the most extreme metal head. Could the Unbrokenstring Crew look into this and put this unit back into service? First, a tour.  You can have two channels, or a mix of the two ‘Automix’ inputs.  This was a ‘thing’ back in the day.…

Crate Vintage Club 50 Amp Repair

St. Louis Music produced this handsome tube-based Crate amp. Robin said that this unit is ready for some service. I just love the blonde Tolex and clean appearance of this unit! The front panel reveals that this is a single input, two channel unit.  The clean channel sports conventional treble and bass controls.  Bringing the…

Fender Hot Rod Deluxe Car Wreck

This seasoned road warrior was happily touring and now was called up for recording duty.  However, at the final live set, the unit became very warm and the audio dropped way off.  Could the Unbrokenstring Crew work some magic to return this guy to the studio? This unit has been in the shop once in…