On 06/25/13 00:32, Mike w0btu Waters wrote:
I discovered some new (to me) information on maximizing the life of
amplifier tubes with thoriated-tungsten filaments. I just uploaded it to:
http://www.w0btu.com/miller-larson_effect.html
Basically, every time the tube filament passes through a certain
temperature range as we turn it on (or power it down?), we shorten the life
of the filament, due to the Miller-Larson effect.
I would appreciate any comments on it, good or bad.
This is what makes 620 Watt flashing tower beacon lamps have a hard
time lasting a year. (and perhaps why there are two to a fixture)
--
Ron KA4INM - Youvan's corollary:
Every action results in unwanted side effects.
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