Nasty Distortion in a Dumble Overdrive Special (clone)

It started as an adventure to discover what makes a Dumble amplifier so iconic and sought after. But to reach this treasure we had to wade through a swamp of questionable workmanship led astray by a treasure map (aka schematic) determined to send us down many snake-infested dead-ends. In the end, we reappeared in the sonic sunshine of a small Dumble clone. And yes, it was worth it.
Join me in this adventure and you may even pick up a skill to use in your own Quest.

Index
00:00 Introduction
00:50 First appearances
02:31 Chris is attacked by a bloodthirsty wolf
02:42 A closer look at the circuit board
03:20 Wiring Map
04:27 Schematic Errors Pt 1
05:00 Improving the reservoir Filter capacitor
08:55 Schematic error Pt 2. Fixed Bias? Cathode Biased?
15:25 The installation and wiring of the PCB
16:00 Check the power tubes for a source of massive distortion
18:25 Testing the tube voltages
21:20 Setting the Bias
27:55 Soundcheck of the Dumble Overdrive Special (clone)