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Purgasound on YouTube
Repair walkthroughs, teardowns, shootouts, and the occasional rant. New videos every week from the workbench.
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View all videos18:24
Marshall JCM800 2203 Teardown & Bias Demo
We open up a 1983 JCM800, walk through the circuit, and show exactly how to bias the output tubes.
12K views18:24
14:07
Why Your Vintage Amp Hums (And How to Fix It)
Filter caps, heater wiring, and grounding — the three most common hum sources in old tube amps.
8.5K views14:07
22:11
Plexi vs JCM800: Can You Hear the Difference?
Blind shootout between a 1968 Super Lead and a 1982 JCM800 through the same cabinet.
21K views22:11
31:45
Recapping a Fender Bassman Start to Finish
Every step of replacing filter caps, coupling caps, and bias caps on a blackface Bassman.
15K views31:45
26:33
Hand-Wired 18W TMB Build, Part 1
Designing the layout, choosing transformers, and building the turret board for a small British-style combo.
9.2K views26:33
19:50
Tube Amp Myths Debunked
We tackle the most persistent myths about tubes, capacitors, and tone in vintage amplifiers.
34K views19:50