Re: Transformer location/Safety

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "MIKE HARDY" <MHARDY@xxxxxxxxxx>

I can totally relate. My 4" coil started with a 15/30 NST, and went to a
15/60, in the basement. All components under the primary deck. I wanted to
bring this out to the garage. I had to totally dismantel the thing, (took
hours)carry it out in pieces, and re-assemble. My 6"coil is all modular. I
can break it down, and throw the whole thing, including PT  (running at over
4 kva), in the back of my VW Golf. It takes about 1/2 hour to assemble.
----- Original Message -----
From: "Tesla list" <tesla@xxxxxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Tuesday, April 18, 2006 9:11 PM
Subject: Re: Transformer location/Safety


> Original poster: "D.C. Cox" <resonance@xxxxxxxxxx>
>
>
>
> I see what you are saying.  My point is to simply use the best
> possible engineering, ie, not give away any power you don't have to
> in parasitic losses.  You're absolutely correct though --- spark gap
> losses contribute the greatest losses, heat, light, etc, which is why
> everyone is running to solid state drivers for many applications.
>
> If you take a coil such as yours out to a school, with xmfr direct
> mounted, you will need a good supply of gorillas to move it about or
> "lotsa caster wheels"!!
>
> On our NST pwr supply boxes we just use handles.  If we use multiples
> of 60 or 120 mA NSTs we put them in separate boxes and "jumper" them
> together with GTO and simple 1/4 inch bananna plugs/receptacles
> mounted on delrin plastic plates --- keeping things modular really
> helps reduce the weight when we haul the coils around for school
> programs, public demos, etc.  It's important to consider this in the
> very design phase when building a coil. Carrying boat anchors isn't
> much fun --- been there, done that.
>
> Dr. Resonance
>
>
> ----- Original Message ----- From: "Tesla list" <tesla@xxxxxxxxxx>
> To: <tesla@xxxxxxxxxx>
> Sent: Tuesday, April 18, 2006 1:27 PM
> Subject: Re: Transformer location/Safety
>
>
> >Original poster: "Gerry  Reynolds" <gerryreynolds@xxxxxxxxxxxxx>
> >
> >Is it a bad idea?? Maybe and maybe not.
> >
> >Do you get eddy current losses??  Yes!  You also get copper losses,
> >sparkgap losses, etc.
> >
> >Are these losses significant??  Depends on how close the metal is to
> >the primary.  My 4 NST's are 1.5 feet below the primary.  The cases
> >dont touch each other and are only connected together by a one wire
> >connection to minimize eddy currents.  Is my power loss
> >significant.  I dont think so since I get 86 inch arcs with a 15KV
> >120ma source (freau factor of 1.9 based on measured real power at
> >the wall of 2KW).
> >
> >The real question, I believe,  for each one of us to answer is how
> >much loss is acceptible.  Everything in life is a trade off for the most
part.
> >
> >Gerry R.
> >
> >
> >> > Original poster: "D.C. Cox" <resonance@xxxxxxxxxx>
> >> >
> >> >
> >> >
> >msnip...