RE: [TCML] Toroid Problems

["Lau, Gary" <Gary.Lau@xxxxxx>]

I see no mention of what you're using for a capacitor, or primary coil. You have verified that the primary and secondary resonant frequencies match, right?  It does sound like they don't match with the toroid in place, but YOU need to gather all the numbers and verify this.  One can't just throw together an NST, capacitor, primary and secondary coils, and hope it will all play together.  If any one of them is the wrong value, it will be out of tune and won't work.

Regards, Gary Lau
MA, USA

> -----Original Message-----
> From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On
> Behalf Of Nicholas J. Goble
> Sent: Monday, August 04, 2008 1:38 PM
> To: tesla@xxxxxxxxxx
> Subject: [TCML] Toroid Problems
>
> Last night, I fired up my coil for the first time.  I set everything up
> and made sure that all the connections were solid.  When I plugged the
> NST in, the spark gap fired, but there were no sparks coming from the
> toroid.  I tapped the entire primary, but got no streamers.  At a few
> points, the safety gap was firing, so I guessed that the caps were
> working.  I thought that the only thing that could be wrong was the
> toroid.  When I disconnected the toroid and ran the coil, I got
> streamers and some corona coming from the tip of the secondary wire.  I
> was able to tune the coil without the toroid.  I got 5-6 inch
> streamers/sparks from the wire.
>
> Here are the specifications for my toroid:
> 4" height
> 17" outer diameter
> 9" inner diameter
> I took two flimsy 9" pie pans and glued them together.  Then I wrapped
> 4" aluminum dryer duct tubing around it and secured the ends together
> with duct tape.  I secured the tube's connection to the base with caulk
> on the rim of the pie pans.  I took some aluminum foil and wrapped it
> around the duct taped section, and connected that to the base (pie
> pans) with more duct tape.  I drilled a hole in the middle of the pans
> and attached a nut and bolt.  I sanded off most of the enamel of the
> end of the secondary wire and secured it to the middle of the toroid
> with the bolt.
>
> My secondary is 4" dia and 21" tall.  I'm using a 9/30 NST.  Can anyone
> diagnose my problem?  I dobut that my toroid is too big.  If anything,
> I thought it would be too small.  I used a nail to create a breakout
> point on the toroid while it was running and it still failed to produce
> streamers.  What's the problem?
>
> Thanks
>
> Nicholas Goble

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