RE: [TCML] Kinraide Coil Reproduction - Near Completion. Near exhausted.

["Lau, Gary" <Gary.Lau@xxxxxx>]

Hi Jeff,

Please define " effluve"?  And how can I get some for my coil ;-)

Thanks, Gary

> -----Original Message-----
> From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On
> Behalf Of Jeff Behary
> Sent: Thursday, August 21, 2008 12:06 AM
> To: Tesla Coil Mailing List
> Subject: [TCML] Kinraide Coil Reproduction - Near Completion. Near exhausted.
>
>
> Hey All,
>
> The Beeswax/Rosin/Silk/Cotton/Copper/Bondo/Brass/Bakelite/Brazilian Cherry
> experiments are coming to a close, finally.  Just the polishing bits left, staining,
> lacquering, and hard rubber posts to add for X-Ray tube connections, and
> insulating handles.
>
> Coils, with revolving/sliding discharging posts mounted:
> http://www.electrotherapymuseum.com/2008/20August08/index.htm
>
> Testing spark capacity at various currents.  12" Sparks between ball terminals.
> http://www.electrotherapymuseum.com/2008/KinraideCoilNearingCompletion/index.
> htm
>
> Crude YouTube of testing using a variac.  Note the sound differences in the sparks
> as the voltage rises...
> http://www.youtube.com/watch?v=k3bWPyJaZdA
>
> Some original ads for Kinraide machines:
> http://www.electrotherapymuseum.com/2008/KinraideAds/KinraideAds.htm
>
> The spark gap will have some additional posts for external spark gaps/interrupters
> of other kinds.  These will produce much different spark variations (pseudo-static,
> etc...).
>
> Current spark gap is here:
> http://www.electrotherapymuseum.com/2008/ElectricalSparkGap/index.htm
> This produces long, thin sparks with a lot of effluve innerspaced.
>
> Much different than a simple 1/4" OD Tungsten Gap, with the same coils:
> http://www.electrotherapymuseum.com/2008/BipolarFire/TBKCrackle.wmv
>
> Specs:
>
> Base is 18" x 24" x .1875" bakelite mounted to 1" x 4" Brazilian Cherry [floor
> panels]
>
> (2) 1000 turn Pancake Coils insulated in beeswax/rosin, 6 turns of 1" wide copper
> ribbon for each primary, secondary coils contained in a Bondo/resin housing.
>
> Top load for each coil is a 1 7/8" diameter ball with a 10" sliding rod 5/16" OD with a
> 3/4" brass ball on the end.  The centre discharge ball has a 7/16" OD x 5/8" long
> plug that fits tightly into a .45 calibre brass cartridge shell mounted to the top of
> each coil as a socket receptacle.  (Other cartridge shells can be found machined
> into spark gap standoffs...I'm too broke to order bar stock!)
>
> Spark gap - 6" OD 6061-T6 aluminum spark faces, earliest style of "quenched" gap
> using copper water jug to remove heat rapidly from electrodes.  It does actually
> work after a bit of tinkering to get the faces plane and parallel to each other.
>
> Transformer - 7.5" x 3.5" x 1" core.  500 turns #22 cotton covered wire for the
> primary, 8000 turns of #32 enameled wire for the secondary, wound in 20 layers.
> 1760 volts.
>
> Reactance coil, 5 tapped points+common.  Core 7/8" square x 5.25" long.   Wound
> with 22 AWG DCC wire.   165 turns of wire in one layer, tap 1; 165 turns in second
> layer, tap 2; 2 more layers tap 3; 2 more layers, tap 4; two more layers, tap 5; 1
> more layer, final lead #6.
>
> Still determining the maximum current of this one.  It is believed to be 2 or 3 amps
> at the most.
>
> Condenser, 4kV .11 mfd (2 -  2kV .22 mfd in series)
>
> Knife Switch for on/off
>
> 10 amp external variac, to control voltage.  On the lowest power setting, unit will
> function easily with as little as 50 volts from the variac, 800 volts from the
> transformer.  Unit has been tested with as little as 30 volts (480V from the
> transformer) with a lot of spark gap tinkering...
>
> Definately not your average coil, but the one the earliest physcians made their first
> X-Rays with.  Rita informs me it can't stay on the coffee table forever, so I'll have to
> move it to the museum...the weight, like the originals, is around 50 - 60 pounds.
> Each Pancake Coil, without the discharger ball/post, weighs a little over 10 pounds
> a piece!
>
> Jeff Behary
>
>
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