RE: High Voltage Experiments

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Mark Dunn" <mdunn@xxxxxxxxxxxx>


Dave and all followers of this thread:

I can confirm the same thing.  My 1-7/8" dia. coil gives me shocks for
some time after shutdown.  Never experienced same thing on my 4-1/2" dia
coil.  My 1-7/8" coil-form is PE vs. PVC on the 4-1/2".  Always thought
it had something to do with this, but seemed backward in behaviour.
Appears it has nothing to do with the coil-form construction materials
based on this thread.

Mark



-----Original Message-----
From: Tesla list [mailto:tesla@xxxxxxxxxx]
Sent: Tuesday, June 21, 2005 1:21 PM
To: tesla@xxxxxxxxxx
Subject: Re: High Voltage Experiments


Original poster: "David Rieben" <drieben@xxxxxxxxxxxxxxx>

Hi Bart,

That's an interesting observation. Now that you mention it, it does seem
that the "shocks" that I've experienced were with the smaller coils. I
had also mentioned that I never got shocked with a "sono- tube"
secondary coil coil either but that would be a "larger" coil, too,
wouldn't it? Maybe others can shed some more light on this....

David Rieben





----- Original Message ----- From: "Tesla list" <tesla@xxxxxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Monday, June 20, 2005 10:34 PM
Subject: Re: High Voltage Experiments


>Original poster: "Bart B. Anderson" <bartb@xxxxxxxxxxxxxxxx>
>
>Hi All,
>
>This past year I've built some small'ish coils (less the 2" dia.). I've
>noticed the smaller coils have given me lot's of shocks. My 2" coil I
>would say is the most extreme (I would bet a lunch everyday that
following
>a run and sometimes long after, I'll be shocked). My 4.5" coil also
shocks
>me at times, but not as often. My 8.5" has never shocked me nor did my
13"
>coil.
>
>I claimed for a long time that "I have never been shocked by a coil"
>following a run, but then, I started coiling with a large coils and
began
>building smaller and smaller. It wasn't until the 4.5" and especially
the
>2" coil that I actually got a taste of what others were claiming for so

>long (actually, getting shocked on purpose just to see how many times a

>coil would shock me). Rubbing the coil really helps (a lot!).
>
>Just an observation. BTW, except for the 13" coil, all the rest were
>pvc,
>same 24 awg spool on pcv form coated with Marine Spar Varnish.
>
>Take care,
>Bart B.
>
>Tesla list wrote:
>
>>Original poster: Terry Fritz <teslalist@xxxxxxxxxxxxxxxxxxxxxxx>
>>
>>Hi Bill,
>>
>>Tesla coils do tend to charge the surrounding area negatively (I
>>think).
>>Negative voltages tend to arc and ionize much easier so the coil sort
of
>>acts like a big rectifier to some extent.  Antonio would know the
details
>>for sure.  But the net charge might very well run a little nearby
>>electrostatic motor.  The output of the coils itself is heavy AC and
very
>>high power low duty cycle pulses so a direct connection would be
"messy".
>>But the effect/method you describe to run motors with a TC sounds very

>>reasonable!
>>
>>We are thinking that secondary coils that tend to shock long after
>>they
>>are apparently discharged are seeing an "electret effect".  Coils
coated
>>with insulators seem to really show this effect well.  One can rub
one's
>>hands all over the things or run a grounded wire all over them just to

>>have them recharge after a short time.
>>
>>There is also "dielectric absorption".  "I" am not very familiar with
>>that...  I should be....  0:-)
>>
>>Cheers,
>>
>>         Terry
>>
>>
>>At 12:12 AM 6/20/2005, you wrote:
>>
>>>On Sun, 19 Jun 2005, Tesla list wrote:
>>>
>>> > Original poster: "Chris Rutherford" <chris1@xxxxxxxxxxxxxxxxxxx>
>>> >
>>> > Hi All,
>>> >
>>> > Has anyone ever tried using a Tesla coil as a power supply for an
>>> > electrostatic motor?
>>>
>>>I haven't tried it myself, but I've had emails from people who built
>>>the "Pop-bottle motor" on my website, and they say that the motor
>>>starts turning if one of its terminals is grounded and it's placed
>>>near a big TC which is cranked down to where it stop emitting
>>>streamers.  Probably the TC creates corona and is sending out more of

>>>one ion polarity than the other (it's emitting DC electric wind.)
This isn't so suprising, since
>>>old style gas rectifier tubes do the same thing.   A TC terminal in
air is
>>>probably a high-pressure version of a gas rectifier.  Stand too close

>>>and your body might get charged up.
>>>
>>> > Apparently there are some strange unknown phenomena related to
>>> > high voltages and relativistic electron mass due to the > high
>>> > electron acceleration caused by voltages >500Kv.
>>>
>>>Then there's the "leyden jar" effect with secondary coils.  Run a big

>>>tabletop TC for awhile.  Then disconnect power, grab the secondary
>>>with your hand, then touch ground.  Sometimes you'll receive a big
>>>zap!  This even happens with secondary coils which have been sitting
>>>on the shelf. Probable explanation:  the TC emits one polarity of
>>>ions, which are then attracted to the metal windings of the secondary

>>>(the ions would see a grounded conductor and be attracted by
>>>induction regardless of the AC riding on it.)  But the insulation on
>>>the secondary stops the ions from getting to ground, so there they
>>>sit.  When you grab the secondary, your hand forms one plate of a
>>>capacitor, and the metal winding forms the other plate.  Because the
>>>insulation is covered with charges, this is a charged capacitor.
>>>
>>>
>>> >
>>> > Take a look at this paper from the 1920s.  It is almost certain
>>> that > Tesla
>>> > knew of these  properties as he made electrostatic motors and did
>>> > experiments with high vacuums.
>>> >
>>> >
>>><http://www.rexresearch.com/gravitor/gravitor.htm>http://www.rexresea
>>>rch.com/gravitor/gravitor.htm
>>>
>>>
>>>It's very possible that TT Brown mistook ion-wind effects for
>>>"electrogravity" forces.  Is everyone here familiar with the "Lifter"

>>>craziness?  To exclude ion wind from experiements, simply enclose the

>>>device in a plastic bag from which air-jets cannot escape.  (This is
>>>much easier than running the experiments inside a big hi-vacuum
>>>chamber!)
>>>
>>>
>>>
>>>(((((((((((((((((( ( (  (   (    (O)    )   )  ) )
)))))))))))))))))))
>>>William J. Beaty                            SCIENCE HOBBYIST website
>>>billb at amasci com                         http://amasci.com
>>>EE/programmer/sci-exhibits   amateur science, hobby projects, sci
fair
>>>Seattle, WA  206-789-0775    unusual phenomena, tesla coils, weird
sci
>>
>>
>>
>>
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