QRO requires some sacrifice Steve, its called money(-;
The bad news with your idea is that at that voltage you have a better than
equal chance to create a nice plasma arc with attendant serious damage. If
it was so easy HV fuses wouldnt be used by all commercial products outside
of the ham community.
HV fuses show up at hamfests and fleabay for a few bucks.
The creative should be able to duplicate a real HV fuse.
Carl
KM1H
----- Original Message -----
From: <K1SG@aol.com>
To: <amps@contesting.com>
Sent: Tuesday, February 16, 2010 6:59 PM
Subject: [Amps] HV Fuses
> In recent threads, there have been a number of comments about high voltage
> fuses.
> Carl mentioned sand-filled fuses, something I hadn't heard of.
> I checked the Mouser catalog for HV fuses, and was stricken with
> sticker-shock...$38 for a fuse?
> OK, we re-think this one...
> I know that an old but workable approach is to use a thin piece of wire
> as a fuse...mount it between a couple of standoff insulators, and it
> should
> function fine, and if current is substantially too high, the fuse wire
> blows. How do you figure the appropriate size wire to use? And then, how
> do you
> go about ordering 6" of #30 wire, or whatever it is? If you need more
> current capacity, to use the above example, can I put two strands of #30
> wire
> in parallel, and expect them to function as a reliable fuse? I'm always
> worried about kinking the wire, or if it's enameled, sanding off more
> than
> just the insulation.
> The plan is to fuse the HV output of a 5KV 2A supply to a 3X3, which of
> course will only be used at the legal limit or into a dummy load.
>
> Steve Gilbert
> K1SG
> K1SG@AOL.com
> 508-435-9133
> FN42fe
>
>
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