Re: very confused coil results

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

Original poster: "Chris Swinson by way of Terry Fritz <twftesla-at-qwest-dot-net>" <exxos-at-cps-games.co.uk>

dwp, all,



>
> Even if it was only leaking 50 mA or so, enough to light the
> 7W/240V lamp?

50ma would be enough  to see some output.

>
> > I know this all to well as it happend before and left a large burn
>
> >mark on the floor which is why I made a better job of it.  I did
>
> >check this about just in case but there is no short or arc there.
>
>
> Was it checked in the dark?


every test I do is done in the dark, then should something arc when it
shouldn't then you can see it a lot beter.

>
> > Even so would a current flow to ground at 50hz?
>
>
> Why would it not?
> The usual supply is fed from a distribution transformer
> solidly grounded (outside the premises...)


I tested this and at about 5kv you can pass current via grounds. even so
this would require a short from the NST to the bulb.


>
> > I did take a measure from mains ground to coil ground and it
>
> >was higher than 20megs.
>
>
> I fail to see why.  While having them separated has
> it's purposes, they should, at 'DC', be close to the
> same.
>
> > not short there ?!?!?!
>
>
> At the few volts supplied by the ohmmeter for test.
> At mumble KV there may be some leakage.  Only 0.05A
> will light that lamp...  Dos the transformer have
> a center tap, or one end, tied to case?
>

The ground is center tap, this is mains ground. The ground with the bulb on
it is another ground where I banged a 3 foot rod in the garden for a
secondary earth.  I know now current can flow via ground but thats just the
return of the current. There is simply nothing near any HT wires, its all
mounted way above the bulb ground wire.  Im beginning to wonder if theres
another problem relating to earths somewhere else.  As it stands no spark
gap fire no voltage anywhere, no bulb light.... but it does... I will have
to put it down to some form of ground problem, though the end of the bulb is
conencted to the secondary which is no where near anything at all.... very
strange, one for the X-files I think :-\

chris