22:44

Measuring Tube Amplifier Output Transformer Impedance

28:22

Vacuum Tube Output Transformer Measurements Determining Turns & Impedance Ratio & Matching To Tubes

25:36

Output Transformers: A Discussion of Basic Principles

16:47

What does the Choke in a Tube Power Supply do?

36:19

Audio Output Transformers Demystified - Ask Mark

11:43

Bench Testing an Output Transformer - How Do You Know It's Bad?

26:38

Phase Inverters....for the Common Man

8:58

How to bench test an unknown vintage tube high voltage power transformer