Re: Variable Capacitors used in a phase converter

On 17 May 2006 01:56:07 GMT, dnichols@xxxxxxxxxxx (DoN. Nichols)
wrote:

According to John Husvar <jhusvar@xxxxxxxxxxxxx>:
In article <e4akuk22fgp@xxxxxxxxxxxxxxxxx>,
dnichols@xxxxxxxxxxx (DoN. Nichols) wrote:

[ ... ]

Then there was the uuF label, micro-micro Farad.

Yep!

[ ... ]

Cycles, Kilocycles, Megacycles and up... Nobody ever used bicycles in
electronics AFAIK -- well, except to get to the local ham shop to get
parts to build stuff to make the other cycles. :)

Don't forget BBROYGBVGW, y'all!

John, thinking of how much fun it would be to build a 1 Farad
air-dielectric cap

Hmm ... what voltage? We need that to calculate the minimum
gap, and from that the surface area needed to make that capacitance. At
any reasonable voltage, at a rough guess, it would at least cover the
size of some state in the US. :-)

A spacing of .010 inch should handle 50 volts without any problem.
With that spacing, one farad would only require 11.076 square miles.

It's merely a matter of getting two conductive surfaces of 11 square
miles with .010" of air spacing...
.

Relevant Pages

  • Re: Variable Capacitors used in a phase converter
    ... electronics AFAIK -- well, except to get to the local ham shop to get ... any reasonable voltage, at a rough guess, it would at least cover the ... With that spacing, one farad would only require 11.076 square miles. ...
    (rec.crafts.metalworking)
  • Re: Best capacitor for back-up applications
    ... I would rather use a cap as I only need an hour or so of back-up time. ... to get a reasonable voltage drop after an hour, ... You can get them in values between 0.1 Farad and a ... They are usually cylindrical about 20mm or 3/4 inch ...
    (sci.electronics.basics)