Date: Thu, 8 Dec 2011 09:48:09 +

Author: Urs Lauterburg

Subject: Re: Switch

Post:

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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
>


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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 =
BernSwitzerland=
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 ZaniDemonstration ManagerPhysics Brown =
University(401) =
863-3964=

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