Re: troubleshooting tesla coil, continued (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

---------- Forwarded message ----------
Date: Sun, 16 Sep 2007 13:12:26 +0100
From: Tom Trevethan <t.trevethan@xxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Re: troubleshooting tesla coil, continued (fwd)

Hi Marko,

What kind of wire is your primary coil made from? I ask because from 
the picture
it doesn't look like copper. For my first coil I made a primary very 
similar to
yours (helical) and with thick steel wire - which is now know is bad. Spark
output was about 1 in. When I replaced this with a flat spiral coil made from
thin copper tube, output increased to about 18 in.

Cheers,

Tom

Quoting Tesla list <tesla@xxxxxxxxxx>:

>
> ---------- Forwarded message ----------
> Date: Thu, 13 Sep 2007 19:19:45 -0400
> From: Marko Ruban <Marko@xxxxxxxx>
> To: Tesla list <tesla@xxxxxxxxxx>
> Subject: troubleshooting tesla coil, continued
>
> Hello guys, I'm back from a long summer vacation.  As per previous
> suggestions I have acquired an old NST transformer (12kV, 60Hz, 60mA
> output).  And the spark gap does run now with capacitor/primary in
> circuit.  However, there's no visible effect on the topload, still.
> Could it be that badly un-tuned?
>
> Please see the photo of my simple setup and make any suggestions...
> http://marko.dppl.com/TC_setup.jpg
>
> The flat rectangular thing in front, is the capacitor, which should be
> about 7pF.  Can't make a more specific measurement since my new
> multimeter is still in the mail.  Spark gap is on top of the NST, and
> consists of two screws facing each other (about 0.2" adjustable
> spacing).  Wire running in the back to the right is the ground.
>
> Also, here's a dump of JavaTC for my coil...
> http://marko.dppl.com/coil.txt
>
> Thanks in advance for any assistance.
>
>
>
>