Re: [TCML] pad mount transformer tesla coil

["D.C. Cox" <resonance@xxxxxxxxxxxx>]

The 30 Ohms acts as a "Q spoiler" and is very effective in reducing the high 
Q of the transmission line.  The small air core inductor clips the highest 
freq spikes.   These both work very well in the many pole xmfr systems I 
have manufactured over the past 40 years.

Dr. Resonance

Resonance Research Corp.
www.resonanceresearch.com


----- Original Message ----- 
From: "Lau, Gary" <Gary.Lau@xxxxxx>
To: "'Tesla Coil Mailing List'" <tesla@xxxxxxxxxx>
Sent: Monday, November 26, 2007 6:54 AM
Subject: RE: [TCML] pad mount transformer tesla coil


Why do you suggest that a pad-mount transformer requires more protective 
measures than a pole-mount transformer?  Both operate in oil.

I would also question the use of inserting a 30 Ohm resistor to protect the 
unit.  R-C networks provide high frequency attenuation, but a tiny resistor 
and/or inductor do not.  The same rationale for NST protection applies here, 
though it's not clear that a distribution transformer requires any 
protection.

Regard, Gary Lau
MA, USA

> -----Original Message-----
> From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On
> Behalf Of resonance
> Sent: Monday, November 26, 2007 1:11 AM
> To: Tesla Coil Mailing List
> Subject: Re: [TCML] pad mount transformer tesla coil
>
>
>
>
> They are not widely used because most experimenters do not use good
> transient supression on the HV side of their xmfrs.  Pole units, in oil,
> provide superior protection, but even then, should be protected with a 
> small
> resistor network.  I use 30 Ohms at 3 kW resistance.
>
> The pad units work fine but a small air core coil should be used and also 
> a
> resistive filter --- both on the HV side of the xmfr.
>
> Dr. Resonance
>
> Resonance Research Corp.
> www.resonanceresearch.com
>
>
> ----- Original Message -----
> From: "Clive Hansen" <mrclivehansen@xxxxxxxxx>
> To: <tesla@xxxxxxxxxx>
> Sent: Sunday, November 25, 2007 7:11 PM
> Subject: [TCML] pad mount transformer tesla coil
>
>
> > Hello,
> >    Has anybody tried using a padmount transformer to drive a coil? I
> > haven't seen this or heard of anyone using a transformer like this one
> > here:
> > http://cgi.ebay.com/New-Cooper-75-KVA-1PH-OA-Pad-Mount-
> Transformer_W0QQitemZ200130886048QQihZ010QQcategoryZ42881QQrdZ1QQ
> ssPageNameZWD1VQQcmdZViewItem
> >
> > This is merely academic, I just wondered if there was a good reason 
> > these
> > aren't widely used.
> >
> >
> > _______________________________________________
> > Tesla mailing list
> > Tesla@xxxxxxxxxxxxxx
> > http://www.pupman.com/mailman/listinfo/tesla
> >
>
>
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