Re: NorCal Teslathon -- Interesting Devices and Effects

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Mark Broker by way of Terry Fritz <twftesla-at-qwest-dot-net>" <broker-at-uwplatt.edu>

Greg, all,

This is certainly interesting....  I didn't know that even a precisely
tuned reciever could pick up that much power at such a distance!  I was
wondering how these coils were grounded?  If they were connected to the 
same ground wire or rod, then perhaps this enhanced the effect and/or?
Just a thought.

Mark Broker
The Geek Group's Chief Engineer


>Original poster: "Greg Leyh by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<lod-at-pacbell-dot-net>
>
>Original poster: Barton B. Anderson
>
>> Out of curiousity, do you know the approximate power level you were running
>> at and the
>> proximity of Kelek's coil to your's? This must have really blown some minds
>> when it was first
>> noticed.
>
>
>Indeed... when I first closed the contactor and saw Kelek's 
>coil light up, I immediately shut down and glanced over at
>her control table... no one was there!  Then I noticed that
>her rotary gap was not spinning, either.  I had to stop and
>ponder this for a moment, then remembered that her coil runs
>somewhere around 60kHz, from a rough measurement we had made.
>My coil usually runs around 61kHz.
>
>I applied power again, but still couldn't believe that it was 
>possible to couple that much power over that distance... even 
>as I was watching her coil generate a 6ft arc!
>
>The effect was most pronounced when my coil was running at a
>low power setting with almost no breakout, around 13 kW.  As
>the power level increased above 50%, the streamers on Kelek's
>coil would start to diminish.  My first guess is that the
>operating freq of my coil decreases far enough at full power 
>(due to the increased C of the arc and the ion cloud) that the 
>tuning match becomes skewed.
>
>The center-to-center distance between the two coils was about 
>25 feet.  Given the typical 5oo W/ft arc length number and
>a typical coil efficiency of 60%, it would appear that about
>15oo to 18ooW of power was coupled between the coils, in order 
>to produce the 5 to 6ft induced arc.  But then again it might 
>actually require far less power than this to produce a 6ft arc.
>
>Any guesses on the coupled W/ft required to produce a 6ft arc 
>in this fashion?
>-- 
>
>
>-GL
>www.lod-dot-org
>
>
>
>