Original poster: FutureT-at-aol-dot-com In a message dated 9/20/03 11:02:57 AM Eastern Daylight Time, tesla-at-pupman-dot-com writes: >Well, with VTTCs we have a few things to watch out for. Red plates promote >tube arcs from what John Freau has told me. Steve, It depends on the voltage though. With red plates there's less over-voltage "headroom". John