EAG AE785/A 53 Years old Tube Amplifier Test (Original 807 PP Output tubes)

EAG AE785/A Tube Amplifier First testing after 53 years of rest. This is a 807 based PP amplifier with 100V Output. It was modified by the first owner, the AZ4 and EZ80 double diode tubes are changed to normal Diodes. I powered it up from external power supply for try and check, everything is ok. First test was OK about 220V DC Anode voltage (Normally 750-780VDC) and i used -12V negative voltage for the 807 tetrodes grid1.