Re: new to this

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Bob (R.A.) Jones" <a1accounting@xxxxxxxxxxxxx>

Hi Jared,

If this has been explained to you already or if I have already done so sorry
just ignore it.

----- Original Message -----
From: "Tesla list" <tesla@xxxxxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Saturday, December 18, 2004 10:10 AM
Subject: Re: new to this



> Now about a topic dear to my heart, namely wire length.
>
> The old argument that a grounded long wire and a grounded solenoid
> with the same length of wire will have different natural resonant
> frequencies has no bearing on arguments of wire length resonance. When
> we run a straight wire it will have a natural L and C hence it
> resonates at this frequency.  We can take the same wire and wrap it to
> form an inductor it will then have a different natural L and C and
> will resonate at a different frequency. (All true so far).
>
> But who cares about the natural L and C of a straight wire or
> inductor, they have nothing to do with resonant coils where one
> intentionally adds top end capacitance to the natural capacitance to
> adjust the resonant frequency of the system.
>
> There is nothing stopping someone from adding capacitance to one of
> the above mentioned systems until both the straight wire and the
> inductor have the same resonant frequency. People automatically assume
> that L.C  somehow dictates wave velocity. L.C dictates the frequency
> of energy exchange, it has no effect on wave velocity.
> (You would not expect the rate which you empty a bucket to affect the
> velocity of the contents hitting the floor would you?.)

I think you probably have the wrong idea.  There are two types of waves
guided waves and free space waves.
I think your analogy of the bucket is attempting to compare those two types
of waves which is incorrect. Free space waves are almost irrelevant to
coiling anyway.

The velocity of guided waves is principally (if its a good conductor)
determined the L and C of the guiding structure and there can different
modes which can have different velocities.
In connection with coiling its a guided slow wave mode of a helical coil
that is relevant.

I get the impression from your next paragraph that some how you think under
some circumstances the wire length does come in to play but not in other.
That is simply incorrect.  I think Paul Nicholson has a good technical
description about how a coil resonates on his, I thing its called,  TCSP
site.

Bob

Again sorry if this is all old news to you.


> The Rub!:
>
> You can build non wire length quarter wave coils and they work just
> fine. You can build wire length coils and they also work just fine
> (and typically at a lower frequency) Subsequently it has been assumed
> that since both systems function that wire length has no particular
> meaning.
>
> However wire length still has meaning when you intend to form multiple
> nodes on an inductor. If you take a few kilometers of wire and wrap it
> around a large Styrofoam donut, connecting the ends so as to form a
> continuous loop. Then place the correct  top end capacitance at the
> predicted voltage nodes matching L.C. to the wire length. You will
> find nice crisp node formations at  completely predictable locations
> around the coil. Demonstrating (once again) that E.M waves do in fact
> have spatial components as predicted by  J.C. Maxwell.  (You can find
> this experiment on the Tesla Web Ring.)
>
>