Re: Tesla vs. Oudin

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

Original poster: "Jake Draper by way of Terry Fritz <twftesla-at-qwest-dot-net>" <cybermecium2-at-home-dot-com>

The secondary is not grounded. The wire coming from the bottom of the secondary
which should connect to RF Ground is connected to the innner most turn of the
primary.
    Jake D.
    <mailto:cybermecium2-at-home-dot-com>cybermecium2-at-home-dot-com
    http://taradev.cjb-dot-net
 
-------Original Message-------
 
From: <mailto:tesla-at-pupman-dot-com>Tesla list
Date: Tuesday, August 07, 2001 07:47:07 PM
To: <mailto:tesla-at-pupman-dot-com>tesla-at-pupman-dot-com
Subject: Re: Tesla vs. Oudin
 
Original poster: "Antonio Carlos M. de Queiroz by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <acmq-at-compuland-dot-com.br>

Tesla list wrote:
> 
> Original poster: "Jake Draper by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<cybermecium2-at-home-dot-com>
> 
> Hi, I just finished my 3.5" Tesla coil and connected it to my primary circuit
> and it gives some nice 8-12" sparks. BUT, the bottom turn of the
secondary arcs
> to the primary (the coupling is about 1") so I decided to just connect the RF
> ground directly to the primary coil. Does this make my Tesla Coil an Oudin
> Coil? Also, what can I do (besides re-wind the primary) to prevent arcing to
> the bottom turn of the secondary? Thanks,

An Oudin coil has the secondary mounted directly above the primary, as
an
autotransformer. Works in the same way of a Tesla coil. See:
http://www.coe.ufrj.br/~acmq/tur200.jpg
http://www.coe.ufrj.br/~acmq/fle18.jpg
Note the two capacitors, one at each side of the gap. In this way, the
power supply can't be directly connected to the output terminal, even
with a bad ground connection.

About your coil, verify if the secondary is grounded.

Antonio Carlos M. de Queiroz



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