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thanks guys, but this is a little different.........

Posted by radiance (M) on December 4, 2006 at 21:55:31

In Reply to: This problem has been solved in its time. posted by sser2 on December 4, 2006 at 13:03:10:

.......in this particular case I have a secondary that is dedicated to just the rectifier tube, so I have an opportunity here to delay B+ by just delaying the low voltage to the rectifier filament instead of switching high voltage.

yeah, those delay relays are way cool, thanks for the tip, but I have to wonder about what their contacts will look like ten years from now; 400 volts is hard on contacts. Anyone have really long term experience with an amperite delay relay when used with 400 volts?

I think my question is kind of a dumb one, though; the rectifier tubes have high voltage on their plates while their filaments warm up, and it doesn't appear to hurt them, so maybe there's enough space between the plate and cathode in a rectifier tube that cathode stripping doesn't happen.

Also, it's a DHT, but I think it's still coated, so that part probably isn't relevant.

best, charles
"It ain't a comeback until it's left the shop" Jimmy Dunne, the first man to drive a VW Beetle faster than 200 mph, and he has the forehead scar to prove it; I will always honor him for taking a chance on me when I wanted to be an engine mechanic.

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