Someone in my building threw a Twin Reverb in the trash lmao. Indicator light turns on but no sound or hum whatsoever. Looks like I’m gonna learn about amp repair?! Help. #fenderamps #twinreverb #amprepair

Preparing to install a new reverb transformer in a 1960s Gibson GA-20, I broke the terminal in question off of the tube socket. And subsequently realized I forgot to reorder 9-pin tube sockets. This thing has been on my bench for way too long.

#VintageAmp #GuitarAmp #AmpRepair #TubeAmp

On the bench: Gallien-Krueger 800RB
Problem: Intermittent input
Diagnosis: Cracked solder joints
Fix: Reflow that solder!

#Bass #BassAmp #AmpRepair #VintageAmp #Basstodon

I completely rebuilt the filter section of the GA-20, taking advantage of the space I bought from cleaning up the power supply. The previous owner put the two filter caps they replaced on above three wire-wound resistors. Heat rises, and it’s important to keep heat away from capacitors as much as possible. These three resistors dissipate a lot of heat.

#Gibson #GuitarAmp #VintageAmp #TubeAmp #AmpRepair

Currently on the bench: Strymon Flint, in for a new output jack. And a deep cleaning.

#EffectsPedal #GuitarEffects #Reverb #Tremolo #AmpRepair #Electronics #GutarAmps

Replaced the power cord on the GA-20 with a grounded cable, removed the death cap, and rewired the rotary power/polarity switch to just power. I landed a 2 lug terminal strip on one of the power transformer bolts to provide a ground point and a more reliable connection for the pilot light and other half of the primary. The previous lug was badly corroded and broke off when I heated it up. Before and after photos below.

#Gibson #GuitarAmp #VintageAmp #TubeAmp #AmpRepair

Currently on the bench: Gibson Minuteman GA-20 RVT. In for out-of-control squealing (oscillation) and a recap.

60s Gibson amps are a spaghetti nightmare, and the eyelet boards have deep, conical reservoirs filled with solder. The leads of every component are very long and are tough to remove, even with a solder pump. In addition to the oscillation, the reverb and tremolo aren’t working.

I have my work cut out for me.

#Gibson #VintageAmp #GuitarAmp #TubeAmp #AmpRepair