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Re: First Test run (fwd)

---------- Forwarded message ----------
Date: Sun, 08 Jul 2007 11:49:58 -0700
From: Barton B. Anderson <bartb@xxxxxxxxxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Re: First Test run (fwd)

Hi Stephen,

Probably around 840 turns on secondary. Assuming the system is run 
outdoors, in should resonate near 360 kHz. Your cap size is 0.0188uF, so 
the inductance needed is about 9.6uH. Your primary tap for this 
inductance is 5.14 turns. You will likely find your best spark output at 
5.4 turns. I assumed a flat primary and assumed the primary was even 
with the bottom secondary turn.

With that said, realize that nearby objects can effect the frequency, so 
definitely tinker with it.

Take care,

Tesla list wrote:

>---------- Forwarded message ----------
>Date: Sun, 08 Jul 2007 01:47:07 -0400
>From: stephen costanza <baywatch106@xxxxxxx>
>To: tesla@xxxxxxxxxx
>Subject: First Test run
>Hello, After a couple months of working on building my tesla coil, I got the 
>chance to do the first test run. I had the coil out in the yard with a piece 
>of rebar stuck in the ground for the discharge to strike. I was also using a 
>piece of coat hanger for a breakout point. I only had a little bit of time 
>to test it out due to the noise and how late it was. I started out at turn 
>12 and got some discharge and I ended up on turn 8 with a nice and strong 
>discharge out of the coathanger and  without it some smaller discharges 
>through out the tororid. Could somebody with some experience help me out 
>with running some numbers thru one of the programs to find my ideal tap?
>My primary is 1/4" refg. tubing 15 turns . 1/4" spacing between primary coil 
>. Primary to secondary distance is 1 3/4".  Secondary is 4" pvc with  21" of 
>23 awg. Should be 867 turns.
>                     Spark gap is a static gap using   seven  3/4" copper 
>tubes with fan.
>Xformer is a 12/60 . I am using 2 strings of 16 of the 942  .15 mfd
>A spun AL 3x12 toroid sitting on an insulator . Bottom of toroid is 1 1/4" 
>above coil.
>Any ideas on wher is the best place to tap it? Or should I  just tinker with