40:52

Mr R's AMERITRON AL-811H repair :)

18:09

Ameritron AL811H converted to AL811HD with 4 x 572B tubes

50:28

Restauracion Ameritron AL811

12:45

3X572 AL811

7:00

AL80B Tuning With TOF and Tuning Pulser

20:13

AMERITRON AL 811 DE EA2ID AJUSTE

5:41

D-Lab Modified P&H LA-400 Ham Linear 572B tube amplifier Low power RF output problem Need suggestion

12:38

Ameritron Al-811H Repair, Modifications, Faulty Filament Solder Connections At Socket , Etc Etc 572b