RE: troubleshooting tesla coil, continued (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

---------- Forwarded message ----------
Date: Sun, 16 Sep 2007 17:31:23 -0400
From: Scott Bogard <teslas-intern@xxxxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: RE: troubleshooting tesla coil, continued (fwd)


Marko,
     Steel is bad because it has a very high resistance, especially at
radio frequencies, if you run enough power through it for long enough
stuff will melt.  As for a tap, I use a copper u-bracket, bent into a
clamp shape.  I hope this helps. Scott Bogard.

> Date: Sun, 16 Sep 2007 15:08:58 -0600
> From: tesla@xxxxxxxxxx
> To: tesla@xxxxxxxxxx
> Subject: Re: troubleshooting tesla coil, continued (fwd)
> 
> 
> ---------- Forwarded message ----------
> Date: Sun, 16 Sep 2007 16:32:38 -0400
> From: Marko Ruban <Marko@xxxxxxxx>
> To: Tesla list <tesla@xxxxxxxxxx>
> Subject: Re: troubleshooting tesla coil, continued (fwd)
> 
> It is made of steel wire :) actually.  And thanks for noting that.
> 
> I do have 1/4" copper tubing available to make a new primary, but I
> didn't think performance would be effected THAT much.  Can you briefly
> tell me why steel is bad for this purpose?
> 
> Can you hint how to tap onto the copper tubing?  Is it just an alligator
> clip?  Does the tap have to be bolted on?
> 
> Thanks
> 
> 
> Tesla list wrote:
> 
> ---------- 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.
> 
> 
> 
> 
>     
> 
> 
> 
>   
> 
> 
> 
> 
> 

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