>Rich says:
>
>>Shutting off a 600v-rated pass-FET in a regulated 1500v supply has
>>consequences.
>
>So why use a 600volt rated FET?
>
This is what's available on high dissipation units.
>You can't get a 1500 volt rated FET?
>
not that I know of.
>How about a glass encapsulated, hermetically sealed, hollow state FET
>capable of
>running high voltage, current and temperature - say a 4-125?
>
A 4-400C would handle it. FETs work well provided one uses a
pass-protect crowbar and a fast acting fuse in the primary of the screen
supply. /see Fig 7B on my Web site./
>
cheers, Peter
>
>
- Rich..., 805.386.3734, www.vcnet.com/measures.
end
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