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Re: [TCML] No topload output



On 12/28/15 10:13 PM, Heather & Paul Novotny via Tesla wrote:
Ok spent a little more time with it and I did notice that I am getting a fair amount of corona from the top windings of the secondary coil.  Does this mean my toroid is too high?

Move the topload down a bit. On mine, the top of the winding is within the toroid.

Also, can someone tell me how much more I can go on my spark gap without damaging the NST?  Keep in mind I have a Terry Filter with a safety gap.


Disconnect your primary C and L, run the variac up to you maximum voltage (or just plug in the NST). Set the gap so it just fires (with the fan on).


Thanks - Paul
--------------------------------------------
On Mon, 12/28/15, Heather & Paul Novotny via Tesla <tesla@xxxxxxxxxx> wrote:

  Subject: Re: [TCML] No topload output
  To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx>
  Date: Monday, December 28, 2015, 10:06 PM

  Well, I added about 4 more turns to
  my primary and with the addition of those windings, I am now
  seeing streamers off the topload and I did away with the
  strike rail.

  I am currently at about 9 - 1/8th turns.

  I am seeing about 12-15" streamers.They seem to primarily
  appear on only one side.  Not sure why this would
  be.  The other thing I noticed is I can hear faint
  snaps every once in a while after I shut the coil
  down.  I tried to hear where they were coming from and
  it sounded like "static electricity" and sounded like they
  came from the secondary coil.  Then I touched the
  secondary and got a little bit of a shock :)  I suspect
  it is due to the bucket cap not having a resistor across
  it.

  Check out the video here:

  https://youtu.be/Cg9OAyG1Qqo

  Thanks for the help guys!

  Paul

  --------------------------------------------
  On Mon, 12/28/15, Jim Lux <jimlux@xxxxxxxxxxxxx>
  wrote:

   Subject: Re: [TCML] No topload output
   To: tesla@xxxxxxxxxx
   Date: Monday, December 28, 2015, 8:57 AM

   On 12/27/15 7:08 PM, Heather &
   Paul Novotny via Tesla wrote:
   > Hi Jim,
   >
   > I do have about a 2" gap in my Strike Rail.
   >
   > Good idea to run a solid copper wire from ground up
   next to the toroid and a having breakout point on the
  toroid
   to see if anything is happening up there.
   >
   > I have the coil on the floor of my garage which is a
   cement slab poured on earth.   My ground is a
   copper wire that runs to a metal stake pounded down about
   2.5 feet into the earth outside my garage.
   >

   You want the RF path for the secondary to be short and
   direct. Using the
   slab floor is good if you're building a BIG coil that sits
   on the floor.

   In your case, though, the bottom of your coil is sitting a
   meter off the
   floor.  You might try just setting the coil on the
   floor (if your
   cabling allows that).  Careful of strikes to the other
   primary components.





   > Thanks!
   >
   > Paul
   > --------------------------------------------
   > On Sun, 12/27/15, Jim Lux <jimlux@xxxxxxxxxxxxx>
   wrote:
   >
   >   Subject: Re: [TCML] No topload output
   >   To: "Heather & Paul Novotny"
   <p_novotny@xxxxxxxxx>,
   "Tesla Coil Mailing List" <tesla@xxxxxxxxxx>
   >   Date: Sunday, December 27, 2015, 9:02
   PM
   >
   >   On 12/27/15 5:29 PM,
   >   Heather & Paul Novotny via Tesla
   wrote:
   >   >
   >   Hi guys,
   >   >
   >   > I just
   >   tried my TC for the first time tonight
   after COUNTLESS hours
   >   of work on it.  Unfortunately, I
   am getting no streamers
   >   from the topload.
   >   >
   >
   >   Do you have a breakout point
   >   on the topload?
   >   And something to spark to? I
   >   use a piece of grounded (as in
   connected to
   >   the bottom of the
   secondary/counterpoise)
   >   copper tubing  that sticks up
   >   and I can
   >   move closer and farther from the
   topload.
   >
   >   In your picture, I'd put
   >   it sticking up from the edge of your
   cart,
   >   until you get things working.
   >
   >
   >   Does your
   >   strike rail have a gap in it? (It
   should, or it looks like a
   >
   >   shorted turn)
   >
   >   What's your ground scheme look like?
   For a
   >   coil this size, I'd use
   >   something like
   >   a 3-4 foot square piece of chicken
   wire or hardware
   >   cloth, or sheet metal under the
   coil.  (rule
   >   of thumb is that "ground"
   >   should
   >   have a radius comparable to the height
   of the secondary).
   >   In
   >   your case, that ground
   >   screen/counterpoise should be at the
   level of the
   >   top of your cart.
   >
   >
   > _______________________________________________
   > Tesla mailing list
   > Tesla@xxxxxxxxxx
   > http://www.pupman.com/mailman/listinfo/tesla
   >

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