Re: Capacitor Question?? (fwd)
---------- Forwarded message ----------
Date: Tue, 13 Jan 1998 13:28:35 -0800 (PST)
Subject: Re: Capacitor Question?? (fwd)
On 13 Jan, Tesla List wrote:
> Date: Mon, 12 Jan 1998 22:02:53 -0600
> From: Zuma <mwise-at-ns.sosis-dot-com>
> Subject: Capacitor Question??
> I have tried making rolled poly caps
> using multiple 6mil sheets and have had no luck. Using that many layers
> it is extremely hard to keep the plates even on both ends and roll
> it tightly. If your wondering how many layers I am talking here, there
> were 15 60 mil thick sheets.
Not exactly related to your question, but kinda.
Why are people trying to build single caps with 90mil thicknesses?
Perhaps I am off base, but would it not be easier to construct
3 caps, using 30 mil/ea, and wire in series? Granted, I have been
building plate caps this way, not rolled caps, but I cannot
see why you cannot apply the same technique. Yes, I realize this
increases the amount of plate material, but it is better than
a cap that does not work at all, no?
In addtion, you can use a smaller diameter pipe. For me, this would
be the saving grace, as anything over 3" gets real expensive around
[ side note: has anyone ever considered using heavy-duty aluminum foil
in place of the flashing? I can get 18" wide foil. Allowing 2" of
poly on either side of the plates gets you 12" of overlap, and a
4" thick connection point at either end of the roll. as the foil
is not as stiff (1mil, vs 10mil) you can get a tighter roll, as well
as reducing the inductance of the cap itself. Comments?]
Michael Baumann Optivus Technology Inc.|Loma Linda University Medical Center
San Bernardino, California. (909)799-8308 |Internet: baumann-at-llumc.edu