Re: [TCML] "Means for increasing the intensity of electricaloscillations" The Tesla Superconductor of 1901

[Bert Hickman <bert.hickman@xxxxxxxxxx>]

Hi Carl,

In addition to the excellent sources Jim mentioned, some other great 
references include:

"Gas Discharge Closing Switches" by Schaefer, Kristiansen, and Guenther 
(1990, Plenum, ISBN 0306436191). Modern text that covers virtually all 
types of gas discharge switches. Although the focus is on pulsed power 
applications, lots of useful information for the spark gap TC and HV 
experimenter.

"Theory of Gaseous Conductors and Electronics" by Maxfield and Benedict 
(1941, McGraw-Hill). Contains excellent section on DC and dynamic arcs.

Some good references can also be found in some books written during the 
golden age of spark radio (1905-1920). It turns out that many 
discoveries made by by modern-day Tesla Coilers are found to actually be 
rediscoveries of effects observed by spark radio engineers and researcher.

Some of the better treatments of spark gaps in tuned circuits can be 
found in Morecroft's "Principles of Radio Communication", John Wiley & 
Sons (1st - 3rd editions, 1921, 1927, or 1933). The 935-page 1st edition 
is available via Google Books and is available for online reading. The 
PDF download is here:

http://books.google.com/books/download/Principles_of_radio_communication.pdf?id=LOsOAAAAYAAJ&output=pdf&sig=ACfU3U1jI7LygyBS1-2HM6HK3OudergksA 


Another excellent reference is Zenneck's, "Wireless Telegraphy", 
McGraw-Hill, 1915. This book is also available on-line and can be 
downloaded as a PDF file via the Internet Archive:

http://www.archive.org/details/wirelesstelegrap00zennrich

Best wishes,

Bert

Carl Noggle wrote:
> Excellent work on the vortex gap.  Mine is pretty similar, but I don't
> think it has a vortex. I couldn't find a blower better than a vacuum
> cleaner motor either.
>
> Your waveform has saved me an experiment (mixed feelings). The first
> part of the WF shows an exponential decrease, which we would expect if
> the loss was caused by resistance, but it then becomes linear, which
> means that the gap voltage drops are determining the loss. The
> quasi-exponential part is then probably caused by a combination of
> resistance plus gap voltage drop.
>
> I simulated this in MicroCap using 1N4007 diodes back-to-back to
> represent the gap and charging the cap to a voltage which gave a
> waveform very similar to yours, which turned out to be 40 volts. (C=50nF
> and L=70uH, with a charging voltage of 10k.) This would tend to indicate
> that the gap voltage drop (cathode plus anode) is of the order of 175
> volts, and is pretty constant with current. If you send me your voltage,
> L and C I'll run it for your coil and get a better result.
>
> This is interesting stuff.
>
> ---Carl
>
>
>
> > My vortex gap is documented here:
> > http://www.laushaus.com/tesla/vortexgap.htm
> >
> > And the simpler sucker gap is here:
> > http://www.laushaus.com/tesla/onegap.htm
> >
> > Sorry about the outdated links in the archives...
> >
> > Regards, Gary Lau
> > MA, USA
> >
> >
> > On Tue, Apr 12, 2011 at 5:58 PM, Carl Noggle<cn@xxxxx> wrote:
> >
> > > Sounds right to me. The gap still won't dissipate much power, and the
> > > > primary Q will still be high. Do you know if the gap voltage drop
> > > > has been
> > > > measured? Sounds difficult. Where can I find out more about Gary Lau's
> > > > sucker/vortex gap? Sounds cool. I'm using a blown annular gap that
> > > > works
> > > > nicely.
> > >
> > >
> > > <snip!>
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