Let's Repair: Vox AC30 TB/TBX. It Blows Fuses & Hums

This Korg-era Vox AC30 blows fuses. There are several reasons why this can happen. Let's investigate several possibilities. We will also tidy up some of the ground loops that are known to be issues with this otherwise excellent Version of the AC30. The owner wants it to sound as close as possible to a JMI era AC30, so we will make a couple of minor changes to the circuit.

Index
00:00 Introduction
00:35 A 3-minute history of Vox amps
04:10 Korg Era Pros and Cons
04:50 Inspection of the Circuit
08:30 How to test PCB-mounted capacitors
8:54 Hum from the Heaters/Filaments
11:30 Reduce Ground loops
11:50 Why replace Screen Grid and Cathode resistors with different values
14:15 Why reduce the value of the Reservoir Filter Capacitor