Hi Ben,I really don't understand how Brooke Clark could have ever come to the conclusion that a self-resonant coil has a Q of 1. This is easily refuted by a few simple measurements, and most well constructed Tesla Coil resonators easily achieve Q's in the range of 200 - 300. It sounds like Mr. Clark is simply a bit confused about Tesla Coil operation and practical Q measurements for unloaded and loaded Tesla Coil resonators. Q is a measure of the energy stored in the inductor divided by the energy lost PER CYCLE. One form of Q can be written as:
Q = 2*pi*Fr*L/Rac where Fr = resonant frequency L = Inductance Rac = equivalent resistance of inductor at FrIt can easily be seen from the above equation (and easily experimentally confirmed) that Q actually $decreases when external capacitance is added, since this lowers the resonant frequency of the circuit. There are a significant number of other inaccuracies on Mr. Clark's site as well...
The TCML used to modify all URL's and email addresses by substituting a "dot" for a "." in an attempt to thwart 'bots from harvesting addresses for spammers. Don't know how well this worked though.
Bert Ben Sneath wrote:
hello all, i found the on the website: www.prc68.com/I/electron.shtml(if the link shows up)...All of the above is very important since a coil operating at it's self resonant frequency has a Q of 1, no matter how it was made. (This is something that 99.99% of the Tesla coil builders don't get.) So in order to get high Q you need to load the coil with a capacitance that's substantially larger than the self capacitance. You can see the it's very important to not only wind the coil in such a way that the HF resistance is minimized but also in such a way that the self resonant frequency is as high as possible... is this true? secondry with a Q of 1 no matter what when @ its res. frequency????? if it is right then how does that happen?? BTW...why in older posts was the "." replaced with the word "-dot-" in links? _______________________________________________ Tesla mailing list Tesla@xxxxxxxxxxxxxx http://www.pupman.com/mailman/listinfo/tesla
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