5U4, 5R4, 5V4, 5AR4 & Solid State Rectifier Performance in Vacuum Tube Amplifiers
19:53
SS, 5U4, 5V4, 5AR4, 5V3 & 5Y3 Rectifiers Compared In 75 Watt Vacuum Tube Audio Amplifier
48:56
Vintage Vacuum Tube Amplifiers & Modifications
11:26
Tube Rectifier vs Solid-State Rectifier - What's the difference?
1:14:50
Electronic Circuitry Diagnosis And Fault Finding! [Repair]
44:12
Impedance Ratio: The Easiest Way to Decipher Output Transformers
17:56
Willsenton R300: Let's drop some 5AR4 rectifiers in it!
1:12:39
Linear DC Power Supplies - Designing & Building Custom DC Power Supplies
13:34