Re: The NEW Tesla Museum

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

Original poster: "Tesla Museum by way of Terry Fritz <twftesla-at-uswest-dot-net>" <tesla-at-electrotherapymuseum-dot-com>

Bart,

Thank you for the reply.  The threaded coil forms are really appealing,
both to the eye and in operation.
The spark gap photos are incomplete so far as I have new gap designs 
that are more efficient yet and use
larger diameter tungsten ( 3/16", 1/4", 5/16", 3/8", 1/2"... )
They work very well when used in series gaps.  I have used a 5-series 
gap with a machine that draws
1 1/2 kilowatts using a 2kV transformer and it works exceptionally 
well.  I have also a 6-series gap that I use with another
1 1/2 kilowatt machine that uses a 15kV transformer.

The 2kV gap gets hot, but remains quenched even if operated continuosly.
This has to do with the close spacing of the gaps.
It uses monster 3/4" tungsten!!!!  The machine it was designed for 
HAD to remain continuous without flucuations, it was a
powerful piece of medical equipment that attatched the poles of the 
primary coil to the human body.  Any failure of gap would
mean instant death to the patient!

The 15kV gap is barely warm when operating, and uses 1/2" tungsten.
The gaps are about 1/10" apart.

For any coil of this size kva or lower, I certainly would not go 
to the effort of a rotary gap for the avg hobbiest coil.
  
I have a VULCAN X-Ray coil that draws close to 30 amps and it uses 
a SINGLE SPARK GAP that is well quenched,
1" x 1/8" rectangular tungsten!  It is amazing in every detail.  
The discharge, when the gap is adjusted ranges from a shower of hot 

sparks 8" long that heats the air intensely, to a 7" flame that rattles 
the floor that is thick and hot enough to melt anything in it's path!
When I say 7" flame, it is actually over a foot long when you account 
for the fact that is bows upward from convection currents.  It is
one MEAN discharge!

Jeff Behary


At Saturday, 21 April 2001, you wrote:

>Original poster: "Barton B. Anderson by way of Terry Fritz <twftesla-at-uswest.

>net>" <tesla123-at-pacbell-dot-net>
>
>Hi Jeff, All,
>
>Great web site! This was really a lot of fun to look around. I especially
>liked the Tesla Coil section showing
>the 200% closeup view of the wound secondary on the threaded form.
You are
>right, the spacing is fantastic. Sure
>wish I had that lathe in my garage. Also, the static gap heat sinks are
>really nice. I am leary that this gap
>will be better than a G10/tungsten SRSG, but still, it is a good
>heat-sinking scheme. Excellent and fun website!
>
>Bart A.
>
>Tesla list wrote:
>
>> Original poster: "Tesla Museum by way of Terry Fritz
><twftesla-at-uswest-dot-net>" <tesla-at-electrotherapymuseum-dot-com>
>>
>> Hello Tesla Enthusiasts,
>>
>> The NEW "Turn Of The Century Electrotherapy Museum" has reopened 
after
>> a year or so of reconstruction...and invites everyone for a tour !!
>> It is perhaps the largest collection of antique Tesla Coils in the
>> United States.
>>
>> http://www.electrotherapymuseum-dot-com
>> contains over 1,500 files including detailed photos of hundreds of
>> machines -
>> including Tesla Coils, Induction Coils, Vacuum Discharge Tubes, X-
>> Ray Coils,
>> Diathermy Machines, Violet Ray devices, Carbon Arc Lamps, Static
>> Electric Machines,
>> Galvanic and Faradic Medical Batteries, Oudin Resonators, Ultra-
violet
>> Ozone and Irradiation
>> Apparatus, and countless others...
>>
>> During the next month an additional 200 photos of EXTREMELY rare
>> Tesla Coils from 1896 - 1910
>> will be featured a new section entitled "Early Tesla Apparatus".
>> Some of these coils are very unique:
>>
>> The Knott Apparatus from 1897- the first Tesla Coil ever placed on
>> the market (for X-Ray use)
>> The Kinraide Coil - 1901 - One of the most efficient Tesla Coils
>> ever designed
>>
>> The Turn Of The Century Electrotherapy Museum will be offering 
reproductions
>> of these two apparatus.
>>
>> As the curator of this museum, I have personally used and tested
>> over 200 Tesla Coils from the Turn Of The
>> Century.  From these designs I have made special Tesla Coil components
>> that use the best technology from
>> all of these machines.  Included are:
>>
>> * Secondary Coils with threaded coil forms.  These coils are virtually
>> flawless in that coil spacing is perfect and finished coils
>>   have windings that are extremely resistant to accidents, scrapes,
>> loosening, or unwinding.  It allows space winding for
>>   higher powered coils using large torroids, but also allows close-
>> winding of within one or two TPI.
>>
>> * Self Cooling Stationary Spark Gaps.  These gaps replace rotary
>> spark gaps as well as inferior gaps made from pipe fittings,
>>  brass spheres, or tungsten carbide.  They are made of either 100%
>> Tungsten or 2% thoriated Tungsten as per request of the buyer.
>>  They have extemely long lives, and are based on early spark gap
>> designs that were made to operate CONTINUOSLY.  The gaps
>>  in the original machines that these are based on still function
>> perfectly after 50, 75, or even 100 years.  Anyone who uses spark
>> gaps
>>  made of anything less than 2% thoriated tungsten is wasting their
>> time and money.
>>
>> * Electromagnetically Interrupted Induction Coil Apparatus - The
>> "Plug and Play" component for modern Tesla Coils.  Based on
>>   the early X-Ray machines that were made to use both alternating
>> and direct currents of varying voltages and supplies, these
>>  lightweight induction coils use a massive tungsten interrupter and
>> modern capacitors.  Their physical design remains faithful
>>  to the early apparatus, allowing the user to build an authentic
>> Tesla Coil using a non-electronical alternative to the standard
>>  neon sign transformer / condenser / spark gap arrangement.  Pancake
>> Style Coils originally used by Tesla and inventors of the
>>  "Kinraide Coil" and other early portable X-Ray Apparatus were used
>> in conjunction with these coils to produce 6-7" flames of electric
>>  powerful enough to excite early X-Ray tubes drawing only a few amps
>> of current from the mains.
>>
>> * Pancake Style Kinraide Coils - Multi-layer Tesla Coils approx.
>> 1.5" tall x 8" in diameter that produce electrical flames rather
>> than
>>  simple spark discharges.  Their efficiency is unmatched, and even
>> when excited with small apparatus drawing only a few amps
>>  powerfully ionise the surrounding air and produce showers of loud
>> crackling sparks not unlike a large X-Ray Coil.
>>  When driven with kilowatt transformers, condensers, and spark gaps
>> these coils produce electrical flames, which, when fine tuned
>>  can produce the famous discharges noted in Tesla's lectures and
>> others "as thick as a man's wrist".
>>
>> Please take some time and visit the website.  It is still under
>constructions,
>> with hundreds of additional
>> photos being taken as you read this.   So visit often, and email
>> me to be put on a mailing list when new and unique coils are
>> added to the site from my vaults...as of 24. Jan 2001 the site has
>> over 100,000 hits from alternative doctors, science enthusiasts,
>> museums, collectors of the bizarre and unusual, and, fellow collectors.

>> I thank everyone who visits.
>>
>> My best regards,
>> Jeff Behary
>> email: jeff_behary-at-hotmail-dot-com
>> curator of The Turn Of The Century Electrotherapy Museum
>> http://www.electrotherapymuseum-dot-com
>