RE: Transformer location/Safety

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Rich" <rdjmgmt@xxxxxxxxxx>

Thank you. I was thinking about my ham radio gear and the little
aluminum boxes they use to separate things in an amplifier and thought
that might help but I see if the RF would go up from the primary into
the secondary if would just a likely go down into the transformer. I am
not using an NST and my windings for my supply are on the outside of the
transformer so I will keep it at a safe distance.
Thanks again.

	Rich

Subject: Re: Transformer location/Safety

Original poster: "D.C. Cox" <resonance@xxxxxxxxxx>



Bad idea.  I've already several reasons on this list why mounting the
nst under the primary is a bad idea but people keep trying to do it
wrong anyway.  Magnetic field sweeps upward as well as downward and
will go right thru you aluminum shield to induce currents in your
copper xmfr windings. Also, downward sweeping magnetic fields will
give up power, ie losses, in anything iron, steel, etc below the
primary.  Just don't do it --- it's very bad basic engineering!!!

Aluminum does not stop a magnetic field.  In high power Tokamaks they
wind the high current windings on the "outside" of the aluminum
container so the magnetic fields can effect the conductive plasma
inside the container.

Mount your nst in a box 4-5 ft away from the coil and you will be
miles ahead without losing power or inducing RF currents into your
xmfr windings.

Dr. Resonance



>Original poster: "Rich" <rdjmgmt@xxxxxxxxxx>
>
>Spring is here and I am ready to start my next coil and was hoping to
>put my HV transformer on the base the same as Gerry did on this fine
>looking setup. My question to the wise ones, would it help to place an
>alum RF shield over the top of the transformer because mine is NOT an
>enclosed NST. It is from a laser power supply, the windings are exposed
>and are the highest part of the transformer.
>   I must also add that I smile each time I see the picture of Gerry
>standing by his setup keeping safety in mind and one hand in his pocket
>and a good ground by being barefoot. :)
>
>Rich , from the middle of Missouri
>
>
>
>
>Original poster: "Gerry  Reynolds" <gerryreynolds@xxxxxxxxxxxxx>
>
>Hi Kevin,
>
>I run my NST farm (15KV 120ma under the primary and have no
>problems.  It is about a 1.5 ft underneath the primary.  You can look
>at the pictures in the directories at:
>
>http://hot-streamer.com/temp/GerryReynolds
>
>and judge for yourself.  I think if you keep things at a reasonable
>distance underneath the primary, you will be OK.  I did think about
>the magnetic field orientation when placing the Terry filter
>components trying to get field cancellation where possible, but dont
>know how critical this is at that distance.
>
>Gerry R.
>
>  >Original poster: "MakingLightning" <MakingLightning@xxxxxxxxxxx>
>  >
>  >Does it hurt to put your main power transformer and protection
filter
>under
>  >the teslacoil?
>  >
>  >Some people have said not to put metal or protection filters under
it
>and
>  >they should be put aside somewhere.
>  >This makes sense but I have seen many coils that have everything but
>the
>  >variac under one. In practice has anyone found out if it really
makes
>much
>  >of a difference?
>  >It sure would make for a neat package to have everything except the
>variac
>  >under the coil.
>  >
>  >Kevin
>  >
>  >
>
>