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Re: Why Medhurst derived fr is approxiamlty correct and thetransmission line equation for the resoance frequency of a 1/4 wave helical resonator or Tesla coil.


Hi Marc,

Well as it has taken me almost a year to half understand the resonance
frequency of a Tesla coil I want get round to the resonance frequency of the
earth for some time.  I believe it can be used to determine the total world
number of lightning strikes to ground by measuring its amplitude.


Regards Bob


-----Original Message-----


>Original Poster: "Metlicka Marc" <mystuffs-at-orwell-dot-net>
>
>" note to moderators, i will understand if you decide not to post this."
>
>  i have been folowing this thread with great intriege. although i admit
>that it is very thick reading for my limited intelegence. and that my
>posted questions are considered uninformed by most.
> the two things that i visualize in this is that i have seen no mention
>of  the natural frequncy of the earth itself, the shuman frequency of
>7.8 hz surounds everything in our inerspace. therefor this freq. will
>always act upon any resonant circut.
> also for trying to factor actual spark lengh using pure math. self c of
>a coil or c of a top load i would think that it would fluctuate with the
>capacitance of the atmosphere.
> in my lightnig capturing era, i never fired a rocket until the
>atmosphere capacitance reached at least 15pf or above. i myself never
>fire my coil in a lightning storm for the streamers set up a positive
>zone that is to inviteing for the negative electrons in a lighting bolt
>to follow.
> this can be ignored if wished but maybe if these where factored in
>something might come out. as i have stated before i am electronicaly
>chalenged but my powers of visualation are far supirior then most. i
>also know that the first gigasecond of breakout does not come from the
>top wind of the secondary but from the bottem winding, then the power
>folds over itself like turning a sock inside out.  thus the end of the
>stramer is from the last turn that has allways been charged to to same
>potential all along.
>
>
>