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Re: Coaxial Capacitor?
Tesla List wrote:
>
> Original Poster: Bob Wroblewski <bwroblewski-at-yahoo-dot-com>
>
> Hi All,
> Has anyone considered using sections of RG-8/U coaxial cable as a
> homebrew HV capacitor? The insulating dilectric is solid polyethylene.
> The inner conductor is solid copper as is the braid shield.
> The capacitance is 29pf per linear foot from an Aplha Wire catalog.
> Then 34 one foot long bundled sections equals a .001 uf cap.
> Start with a bundle of 15 inch segments. Strip the outer braid an
> inch or so from one end. Connect all center conductors together,
> likewise connect all braid sections, rolled back an inch or so from
> the opposite end, together. Place in a 3 or 4 inch OD tube, (maybe oil
> fill?) and cap the ends (no pun intended) and extend a stud terminal
> to the conductors.
> I'm sure if this worked well someone would have tried it by now and
> it would be spun off to others. So where's the flaw? Too costly per
> capacitance value? Area of conductors? Thickness of dilectric?
> Difficulty of assembly?
> Just thinking, I've never tried it. Comments??
>
> Regards,
> Bob Wroblewski
> Dracut, MA
>
If you have some coax lying around, try it and see what happens.
I find that with so much information about TCs I don't really try any
thing new. I just use what I know works. I used to try all sorts of
things years ago when I did not have much info at all about TCs and high
voltage. I think, at least it seems, that the more info we get, the
less experimentation we do.
Jeff Larson jflarson-at-starnetinc-dot-com