Bendix/king ED 551A help
I recently acquired a old ED 551A efis display to mess around with on the bench. My goal with it is to get the beam to display on the screen, and mess around with x/y deflections with a function generator.
As of right now I’m able to get the tube heater to turn on and glow and i can hear the high voltage buzz when applying the appropriate pins with 28v. The main issue seems to be that the tube isn’t getting any acceleration voltage to create the beam.
My main reference at the moment is the EFS 40/50 installation manual, which gives you pretty vague pin input/output info. My hope is someone has experience bench checking these old bendix/king or honeywell crts, and has more info on what kind of signal the symbol generator supplies to drive the beam.
Attached is the pinout for the display from the efs installation