Re: troubleshooting tesla coil, continued (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

---------- Forwarded message ----------
Date: Mon, 17 Sep 2007 20:41:43 -0500
From: resonance <resonance@xxxxxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Re: troubleshooting tesla coil, continued (fwd)




Steel has very poor conducting properties at RF frequencies.  At 60 Hz fine, 
but not at RF frequencies.

Use copper tubing or Home Depot #6 AWG bare ground wire --- we use this on 
coils running up to 60 mA input.


Dr. Resonance

Resonance Research Corp.
www.resonanceresearch.com


----- Original Message ----- 
From: "Tesla list" <tesla@xxxxxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Sunday, September 16, 2007 4:08 PM
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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