AL-811H Amplifier inside
Grid over current board GOP-100 from AMERITRON.
Amplifier is switched to stby mode if the grid current is above 190 mA.
Toggle the STBY switch and the amplifier is ready again.
Installation Instruction for the GOP-100
► Push-button for
resetting, to avaoid the annoying toggle of the STBY switch
► To have everything under
control: ON / OFF switch for the protection board
original tube of AMERITRON AL-811H amplifier,
metal sheet as anode,
plate dissipation 60 W
Now used 572B tube,
Chinese brand, exchange for original tube 811A,
solid graphite anode, plate dissipation 160 W