Teltron Maltese Cross 553

The Teltron Maltese Cross is a high vacuum electron tube with a divergent electron gun aimed at a fluorescent screen partially obscured by a maltese cross. For demonstrating the linear propogation of electrons in the absence of applied electro magnetic fields by projecting the shadow of a maltese cross onto a fluorescent screen.Max filament voltage 6.3v AC, Max anode voltage 5 kv,anode current 0.1mA at 4kv.