Date: Fri, 9 Dec 2011 09:08:15 +

Author: Urs Lauterburg

Subject: Re: Switch

Post:

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Jerryman,

Well, here is a description of the whole thing. However it's in
German though... and so are the pictures ;-).

http://home.datacomm.ch/m.schraner/UBTT-Betrieb.pdf

This picture shows our Tesla in the single mode and it is used to
advertise physics as something worthwhile to study at our university.

http://www.phinst.unibe.ch/content/studium/unterricht/index_ger.html

Regards from over here

Urs

Urs Lauterburg

Physics demonstrator
Physikalisches Institut
Unversity of Bern
Switzerland


Am 08.12.2011 um 14:06 schrieb Zani, Gerald:

> Urs,
>
> Wow!
>
> That is the right way to do it.
>
> Do you have photos of the whole Tesla device and also the switch
> components? Best, - Jerry
>
>
>
> On Thu, Dec 8, 2011 at 3:48 AM, Urs Lauterburg
> wrote:
> Jerry and the Tap-lers,
>
> To switch the HV-section of our Tesla apparatus, this is
> essentially the charging circuit for the HV transformer that powers
> the C for the primary LC circuit, we integrated the startup
> switches in a nice self-made table-top chassis. There is a heavy
> duty rocker to first switch on the rotary that times the spark
> gaps. In fact the rotary is the most important part of the whole
> show. Then I would be able to arm the HV with another manual switch
> that lights brightly red. This makes the power line voltage ready
> and sharp to start the periodic charging of the primary C by means
> of a HV transformer in the Tesla's base. A 35A rated relay that is
> operated by a remote switch attached to a rather long cable is used
> to finally ignite the Tesla to show its performance. Note that we
> use 230VAC at 50Hz here, so 35A makes up for quite some power. The
> HV transformer we use is a type used to light neon lights. It
> generates 15kV with an output short circuit current of 60mA.
>
> If we let our self made Tesla spark in the twin mode where it
> creates approximately 1.5m long, sustained arcs it dissipates
> 1.5kW. The whole apparatus is not made for indefinite continuous
> operation so the remote switch makes it easy to interrupt at will
> after a few minutes and start up again, may it to change the setup
> to show another aspect of the performance or may it only to become
> audible again in order to verbally explain the physics behind the
> machine.
>
> Our Tesla coil demo has actually grown into one of the most
> popular. It even draws the attention of non-science majors that
> would come over to enjoy the spectacle. One can argue what is
> better: To gate the attention of the masses or the true involvement
> of just a few crack elite individuals :-).
>
> Happy demoing mother nature
>
> Urs
>
> Urs Lauterburg
> Physics demonstrator
> Physikalisches Institut
> University of Bern
> Switzerland
>
> Am 06.12.2011 um 17:18 schrieb Zani, Gerald:
>
>> Tappers,
>>
>> Where can I buy a beefy, Heavy Duty In-Line Lamp Cord style AC
>> switch that can safely handle ~750 Watts (~100 amps @110VAC) or
>> something as close as possible to this power rating?
>>
>> Something similar to:
>>
>> http://www.monstermarketplace.com/electronic-parts-and-speaker-
>> cables/heavy-duty-in-line-lamp-cord-switch
>>
>> But with a higher current rating.
>>
>>
>> My Tesla coil at 750 Watts is too powerful for my line switch.
>>
>>
>>
>> Thanks,
>> - Jerry
>>
>> --
>> Gerald Zani
>> Demonstration Manager
>> Physics
>> Brown University
>> (401) 863-3964
>>
>
>
>
>
> --
> Gerald Zani
> Demonstration Manager
> Physics
> Brown University
> (401) 863-3964
>


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http://home.d=
atacomm.ch/m.schraner/UBTT-Betrieb.pdfT=
his picture shows our Tesla in the single mode and it is used to =
advertise physics as something worthwhile to study at our =
university.http://www.phinst.unibe.ch/content/studium/unterricht/index_ger.htmlRegards from over =
hereUrsUrs =
LauterburgPhysics =
demonstratorPhysikalisches InstitutUnversity of =
BernSwitzerlandAm =
08.12.2011 um 14:06 schrieb Zani, Gerald:Urs,Wow!That is the right way to =
do it.Do you have photos of the whole Tesla device and also the =
switch components? Best, - JerryOn Thu, Dec 8, 2011 at 3:48 AM, Urs Lauterburg =
h> wrote: Jerry and the =
Tap-lers,To switch the HV-section of our Tesla =
apparatus, this is essentially the charging circuit for the HV =
transformer that powers the C for the primary LC circuit, we integrated =
the startup switches in a nice self-made table-top chassis. There is a =
heavy duty rocker to first switch on the rotary that times the spark =
gaps. In fact the rotary is the most important part of the whole show. =
Then I would be able to arm the HV with another manual switch that =
lights brightly red. This makes the power line voltage ready and sharp =
to start the periodic charging of the primary C by means of a HV =
transformer in the Tesla's base. A 35A rated relay that is operated by a =
remote switch attached to a rather long cable is used to finally ignite =
the Tesla to show its performance. Note that we use 230VAC at 50Hz here, =
so 35A makes up for quite some power. The HV transformer we use is a =
type used to light neon lights. It generates 15kV with an output short =
circuit current of 60mA. If we let our self =
made Tesla spark in the twin mode where it creates approximately 1.5m =
long, sustained arcs it dissipates 1.5kW. The whole apparatus is not =
made for indefinite continuous operation so the remote switch makes it =
easy to interrupt at will after a few minutes and start up again, may it =
to change the setup to show another aspect of the performance or may it =
only to become audible again in order to verbally explain the physics =
behind the machine. Our Tesla coil demo has =
actually grown into one of the most popular. It even draws the attention =
of non-science majors that would come over to enjoy the =
spectacle. One can argue what is better: To gate the attention of =
the masses or the true involvement of just a few crack elite individuals =
:-). Happy demoing mother =
natureUrsUrs =
LauterburgPhysics demonstratorPhysikalisches =
InstitutUniversity of Bern =
SwitzerlandAm 06.12.2011 =
um 17:18 schrieb Zani, Gerald:Tappers,Where can I buy a beefy, Heavy Duty =
In-Line Lamp Cord style AC switch that can safely handle ~750 Watts =
(~100 amps @110VAC) or something as close as possible to this power =
rating? Something similar to: http://www.monstermarketplace.com/electronic-parts-and-s=
peaker-cables/heavy-duty-in-line-lamp-cord-switch But with =
a higher current rating.My Tesla coil at 750 Watts is too =
powerful for my line switch.Thanks,- Jerry-- =
Gerald Zani Demonstration ManagerPhysics Brown =
University(401) =
863-3964 -- Gerald =
ZaniDemonstration ManagerPhysicsBrown University(401) =
863-3964=

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