Derek,
Yes, he had a ton of variations on the magnifier circuit. Some were
dedicated to specific testing scenarios he was doing. But in the end, his
goal was not to discover how to lower the resonant frequency, but to learn
how to maximize voltage. But the voltage was not for spark production (this
is why Wardenclyffe had large topload for streamer suppression). The Tesla
global wireless system was dependent on large voltages. If you have a copy
of Richard Hull's Guide to the CSN Notes, in the Appendix section (on page
192 or 194...I think), he covers how Tesla Wireless was supposed to work
and how it is different than radio as we know it today.
I do think his receiving circuits (some/all) did employ a spark gap.
Thanks,
~Dan
Kansas City area
On Wed, Nov 28, 2018 at 1:45 PM Derek, Extreme Electronics <
tesla@xxxxxxxxxxxxxxxxxxxxxxxx> wrote:
> Daniel,
>
> Total speculation, but I believe Tesla intended to use another
> spark gap between the tertiary (assuming magnifier) and the top load. I
> have read references that hint that it is possible to get beat
> frequencies in the low Hz range using this arrangement, although the
> system would be running in the Khz.
>
> Has anyone tried this ?
>
> Derek
>
> On 28/11/2018 14:24, Daniel Kunkel wrote:
> > Billy,
> >
> >> 02 Jan. 1900 (p. 365). Please see the very last paragraph! Tesla
> > intended (time permitting) to build an extra coil for full power of
> > apparatus & take pictures outside!
> > I will have to re-read the 02 Jan entry when I get home tonight, as I
> don't
> > recall that part
> >
> >> My question remains: How could this have been done & what would the
> > resonant frequency be?
> > I believe Hull gives the oscillator's values, so it would be a simple
> > operation to swap in the additional values for the topload to determine
> the
> > resultant frequency.
> >
> >> And as a follow up, does anyone have an idea what the lowest possible
> > frequency is for a Tesla coil / magnifier???
> > I have also wondered what frequency is the lowest practical/possible
> limit
> > for a Tesla Coil. At least for a standard AC powered spark gap coil, I
> > can't see it working efficiently below the line frequency* due to
> charging
> > the capacitor and spark gap break rates. Tesla's wireless was going to
> need
> > something on the 8-11Hz range, so he didn't see a problem with these low
> > frequencies. I think the best way to make that happen would be to run the
> > coil on DC to charge the capacitor and then use a rotary gap to discharge
> > the cap.
> >
> > Are you planning on building a large low frequency magnifier?
> >
> > ~Dan
> > Kansas City area
> >
> > *60 or 50 Hz depending on your grid...I think the supply to the Colorado
> > Springs Lab was 133Hz
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