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Secondary Frequency(fwd)
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From: Ed Phillips [SMTP:evp-at-pacbell-dot-net]
Sent: Thursday, August 20, 1998 9:35 PM
To: Tesla List
Subject: Re: Secondary Frequency(fwd)
For what it's worth, the values calculated by (MY) program, assuming 0
external capacitance, are:
374.24 kHz for the small diameter coil, and
291.80 kHz for the large one.
Basis for program is inductance by Wheeler's more accurate
approximation (to make it run faster) and capacitance by one variant of
Medhurst's approximation. Have checked several small (3" and smaller
diameter) coils of various lengths and windings and results usually
agree within a percent or so, which is fortuitous because of the
experimental error.
Ed
Tesla List wrote:
>
> ----------
> From: Mark S Graalman [SMTP:wb8jkr-at-juno-dot-com]
> Sent: Wednesday, August 19, 1998 4:33 AM
> To: tesla-at-pupman-dot-com
> Subject: Re: Secondary Frequency(fwd)
>
> Being a bit lazy ;) the freq of coil B according to
> TESLAC 2.06 is 276 Khz, coil A won't calculate
> due to the 6-1 aspect ratio which TESLAC doesn't
> like. I reality, the frequency shifts all over the place
> depending on where the coil is located, etc. So in
> short, any answer between 250-350 Khz is close
> enough for government work. <G>
>
> Mark Graalman
>
> On Tue, 18 Aug 1998 23:43:03 -0500 Tesla List <tesla-at-pupman-dot-com> writes:
> >
> >----------
> >From: Esondrmn-at-aol-dot-com [SMTP:Esondrmn-at-aol-dot-com]
> >Sent: Tuesday, August 18, 1998 1:17 PM
> >To: tesla-at-pupman-dot-com
> >Subject: Re: Secondary Frequency(fwd)
> >
> >In a message dated 98-08-18 10:50:39 EDT, you write:
> >
> ><<
> > Hi to All,
> >
> >
> > Below are two given coils.
> > What is the frequency of each coil? Another coiler and I disagree on
> >the
> > resonant frequency of these two coils. Can somebody help?
> >
> > Coil A:
> > 21.7" long
> > 3" diameter
> > Wound with 1230 feet AWG 28
> > He says 418kHz (I say 200 kHz)
> >
> > Coil B
> > 10.84" long
> > 6" diameter
> > Also wound with 1230 feet AWG 28
> > He says 275kHz (I say 200 kHz)
> >
> > Who is right??
> >
> > Thanks,
> > Reinhard
> > >>
> >
> >Reinhard,
> >
> >Assuming the length given is the actual winding length and no top
> >load, I
> >calculate 375 khz for the 3" dia. coil and 296 khz for the 6" dia.
> >coil.
> >
> >Ed Sonderman
> >
> >
> >
>
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