After collecting parts for most of a year I am in the serious design
stage of a 4-1000A linear. The power supply, because of its size is to
be external and connected by a cable.
In the first design I was going to bring the 6500VDC power through a
cable to the linear. But then it occurred to me that since the main
reason for the separate supply was the size...which is MOSTLY the 12KVA
transformer I am using. It might be safer to just make the transformer
external and have the rectifiers and filter capacitors in the
transmitter case thus allowing the only the transmission of AC, at a
lower potential, (using a voltage doubler circuit) in the cable. Thus,
by just turning off the input power I could eliminate the potential on
the cable instantly...or almost so...while the filter capacitors which
are the biggest danger would be in the transmitter cage and would be
connected to shorting circuits controlled by the safety switches on the
lid of the transmitter.
There must be some reason this is not a good idea as I have never seen
it done.
Any comments???
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