3X572 AL811
18:38
30L-1 Performance and Reliability Improvement
9:56
Passively and Safely Neutralize the Ameritron AL-572 and Other Amplifiers
39:47
AL811 AL811H Ameritron Critical Safety Mods
11:33
HOW TO TUNE UP THE AMERITRON AL 811H
22:27
811 Tube History including 811A 572B
12:28
Tuning A Amplifier the easy and polite way Part 2… Ameritron AL-80B, 811, 572 82 , Tune Amplifier 
18:09
Ameritron AL811H converted to AL811HD with 4 x 572B tubes
17:34