[TCML] New Toroid

[bartb]

Something else on "primary strikes" I wanted to add.

If you can keep the coil lower to the floor, all the better. The higher 
you put the primary and secondary, the more prominent primary strikes 
will be. Go up only as high as is necessary. Try to keep the height 
above ground to a minimum. The higher you go, the more that is needed to 
overcome the primary strike concern.

Take care,
Bart

futuret at aol.com wrote:
> Tony,
>
> Congratulations on the improved results.  Yes, adding some
> smaller 3" x 15" or 4" x 20"  toroids (or whatever size they are),
> below the main toroid
> will permit you to raise the main toroid.  This will greatly reduce
> primary strikes as you suggested.   Filling in the center
> of the toroids will not give any benefit.  That area is electrostatically
> sheilded anyway by the toroids themselves.
>
> Cheers,
> John
> ----------------
>
> -----Original Message-----
> From: Sfxneon at aol.com
> To: tesla at pupman.com
> Sent: Sun, 7 Sep 2008 1:05 am
> Subject: [TCML] New Torroid
>
> Hello coilers,
>
> I've been tweaking on my bombarder powered, static  vacuum aspirated 
> gap, 8"
> x 33" coil, and I just replaced the smaller torroid  stack with a much 
> larger
> 8" aluminum flex duct torroid measuring 42" in major  diameter. I also 
> went
> from 27nF to 40nF and moved the primary tap in a round or  two, and 
> upped the
> input power to 200-300mA or so. Initial tests were very  successful 
> once the
> correct height above the last winding was found, but because  of the 
> longer arcs
>
> there was more of a tendency for primary strikes. Raising the  torroid 
> helps,
> but field control goes out the window and it wants to break out  at 
> the top
> winding. But when it's dialed in, arc length went from about 6  feet 
> to around
> 8' or 9'. Still, too many primary strikes for comfort.
>
> I've heard that by placing a small torroid or corona ring at the top  
> winding
> will suppress breakout there so that the main torroid can be elevated  
> high
> enough away from the primary to reduce strikes. Would one of my  
> smaller 3" or
> 4"  torroids help with field control at the top winding,  allowing the 
> big one
> to be elevated a foot or more above that?
>
> Also, the new torroid is supported by an "X" shaped support of 1" strap
> steel on edge, centered inside the torroid. Would it add significantly 
> to the
> capacitance to fill in the center with a 26" round piece of sheet 
> metal?  The
> coil has no problem breaking out now, so a bit more 'C' might help 
> even more.
>
> Thanks,
>
> Tony Greer
>
>
>  
> _______________________________________________
> Tesla mailing list
> Tesla at www.pupman.com
> http://www.pupman.com/mailman/listinfo/tesla
>