Golden Age Preamp Cap Job
today’s #teardown tour is the 2011 @goldenageprojectofficial#preq73#mic#preamp#🎛 this fella had hum at all settings. message boards pointed to the #lm317 but i also found a broken solder joint on a cap, and replaced the big #capacitor which bulged for some people, but that #voltageregulator was the real culprit, tell your friends. turns out this part worked hard enough to require a heat sink yet it was left on and cooking with the front power switch only turning it partly off. Def put her on a switched outlet if you have one.
⚡️ok history time: although this device uses new parts, the signal path uses a classic design with one big transistor in place of a tube. hella transformers galore, with the main gain knob also switching transformer stages. no ic chips in the signal path either. thoughtful compromises and ok noise floor if you don’t need to hella crank it. probably pushes nice but you would have to ask @profdef who is her employer. thanks for playing, stay tuned for 4 more installments in the Alesis history tour.
