KT88 vs EL34 vs 6L6 Substitution In Vacuum Tube Amplifier.wmv
25:49
A Night Working On Vintage Tube Amplifiers Part 1 of 2.wmv
17:12
Hand Made Vacuum Tubes by Claude Paillard
17:04
Contorno de frecuencia del amplificador de un solo extremo
14:31
6550 (KT88) Shu Guang vs Telefunken vs Vintage JAN Tung Sol Vacuum Tubes in Dynaco Mark III
21:32
Russian KT77, British EL34, German EL34, Russian KT66 Harmonic Profiles
25:36
Output Transformers: A Discussion of Basic Principles
7:33
Journey to the Center of a Tube
10:15