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Re: [TCML] Secondary and Primary Assistance
Hi Bart, Gary,
I just use my x-ray transformer for conductance testing of
assumed insulating material. I control the voltage to it
through the control panel of my big coil, since the x-ray
tranny is also rated at 240 VAC input and goes to around
150 kV output. "I" believe 100 kV+ is plenty of voltage
for this kind of testing :^)
David
----- Original Message -----
From: "Lau, Gary" <Gary.Lau@xxxxxx>
To: "'Tesla Coil Mailing List'" <tesla@xxxxxxxxxx>
Sent: Saturday, March 22, 2008 7:14 PM
Subject: RE: [TCML] Secondary and Primary Assistance
It's not intuitively obvious, but there are occasions when a small coil can
accomplish things that are very difficult with a larger coil. Yes, I can
see how directing the output from a big coil to a small target on a piece of
pipe (and trying to closely observe the results) can be difficult. I love
my little coils!
Regards, Gary Lau
MA, USA
-----Original Message-----
From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On
Behalf Of bartb
Sent: Saturday, March 22, 2008 8:16 PM
To: Tesla Coil Mailing List
Subject: Re: [TCML] Secondary and Primary Assistance
Hi Gary,
I tried it. Ran my 4.5" coil with a 30" length of sonotube. Got zapped a
couple of times, so decided to isolate myself a little better. I put the
sonotube near the coil (without me) and ran it. I saw no distinction
between ink or non-inked areas. This is an untreated sonotube. The
output is probably 200kV, but still nothing discernible. However, in a
coiled situation, there may be some losses. However, I really doubt the
losses are discernible.
Bart
Lau, Gary wrote:
> As Scott suggested, I think the most revealing test would be to hold a
> sample of
the printed form up to a small sparking Tesla coil topload and see if the
sparks want
to surface track on the printed portions more-so than the unprinted
portions. A real
easy test if one has a piece of Sonotube available; unfortunately I do
not. I don't
know at what voltage a Megger (Meager?) operates, but probably the closer
to
actual TC voltages, the better.
>
> Using what I have, I just held a piece of 4" SDR PVC pipe with
> un-cleaned
printing on it, to the sparks coming from my bug zapper-powered mini coil
(http://www.laushaus.com/tesla/bzt_coil.htm ). I was unable to see any
effect that
the printing had to the sparks. However, when I drew a line with a
graphite pencil
on the PVC, the sparks made a very bright surface track along that line.
Similar
behavior when I sprayed a water mist onto the PVC, though not as bright as
the
graphite.
>
> If someone has a piece of Sonotube and a small coil available, please
> try that?
>
> Regards, Gary Lau
> MA, USA
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