Re: TC Electrostatics
This talk of e.m. and e.s. currents is starting to
make me wonder. I think I am seeing considerable confusion in terms
creeping in here. Electrostatics by definition deals with non-moving
> >However, the relatively small value of capacitance versus that of the
> >coil self-C and toroid makes a BIG change in how efficiently energy
> >couples into the secondary system, as well as detuning the system. If
> >you would have used a 5000 pF cap, the results would have been
> >markedly different. A 50 pF cap represents 15k Ohms of capacitive
> >reactance at 200 kHz - this makes for a _very_ lousy AC path to
> >ground, and would kill coil efficiency even if you WERE in tune.
> I don't think 15k Ohms is correct.
> X(c) = 1/(2pifC) = 1 /(2 x 3.14 x 200,000 x 5 x 10^-8) = 15.9 ohms.
> Actually, this is a fairly good AC path to ground. It's a straight EM
> shot to ground. It's an infinite resistance to DC (up to 35 kV) AND it
> appears to block ES current.
Bert is correct. That should be 5 x 10^-11 (pF not nF) so Xc=15kOhms