
Caution: The tube IS the capacitor, not sure exactly how it works but I think there's a conductive layer on the inside and grounded on the outside with the glass acting as dielectric, but anyway the tube holds the charge. That arc is coming from running the HT circuit. If I recall correctly the HT power converter circuit runs at the TV horizontal frequency so you don't see interference from the converter instead the left of the screen might be fractionally brighter than the right.
2026-08-24 03:12