*To*: Tesla Coil Mailing List <tesla@xxxxxxxxxx>*Subject*: Re: [TCML] Is there an ideal frequency you should build around?*From*: shane bounds <57ovalbug@xxxxxxxxx>*Date*: Sat, 14 Dec 2013 10:01:33 -0600*Delivered-to*: teslaarchive@xxxxxxxxxx*Delivered-to*: tesla@xxxxxxxxxx*Dkim-signature*: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; bh=3qNrY3uggwPFFCClgUDuncHQ1tgfikqh8xpqTd431Lk=; b=xawBNna+QbcVO1NrV/RihYbaK228G0TqFFRKEyr+mwiJfGUVJ60eHAjimkAxxQH0l3 w6iWwBet9s1CBbUGXR29Arky2RaAO+FpEXR87qItI+6Bj41Uj4QpWGTgge9RR4plVJ2Q /2CDR+HbwYNjZAuDVXAnmJpBjtPZyIdRWXzilk2sImYsfYITeXs9qxmAJDHwaexmBwDm 9mAooPRXHZJ8eSmWZibj5wG2DM7baYuaPWJK2lnOrL61PLiRE1RK7JZVxxKx+XQs5VJk y0yYf0A6oJmHuiSq+PSreao327aJ9PVCjko9CKLqLfPmlM18PQSN47x2oUyJD55YF9Zj GCyQ==*In-reply-to*: <52AC691E.5030305@earthlink.net>*List-archive*: <http://www.pupman.com/pipermail/tesla/>*List-help*: <mailto:tesla-request@pupman.com?subject=help>*List-id*: Tesla Coil Mailing List <tesla.pupman.com>*List-post*: <mailto:tesla@pupman.com>*List-subscribe*: <http://www.pupman.com/mailman/listinfo/tesla>, <mailto:tesla-request@pupman.com?subject=subscribe>*List-unsubscribe*: <http://www.pupman.com/mailman/options/tesla>, <mailto:tesla-request@pupman.com?subject=unsubscribe>*References*: <CAGB-SXKy9HO8hJe2cK2gZY7g=nm9KGXtqqWVFo1phJLdV0KcqA@mail.gmail.com> <CAGB-SXJrNp+zp_-U-OrDmzJtoCK3Sh3hnp+3v_v15hC0vpbOMA@mail.gmail.com> <CAGB-SX+KwnQUqdHU-ydpVkJS6QAMzshd2aRbfNMLMKVo712z0w@mail.gmail.com> <52AC691E.5030305@earthlink.net>*Reply-to*: Tesla Coil Mailing List <tesla@xxxxxxxxxx>*Sender*: tesla-bounces@xxxxxxxxxx

Thanks Jim, I'll have to shorten the secondary up a bit from what I had planned, (19" with around 950 turns on a 3.25 thin walled PVC tube with a 12x3 or 13x4 toroid). But yeah this ones just a baby, if I can get 16" or 18" spark length I'll be impressed, then maybe someday when i have a better understanding of them I'll build a monster. Thanks again On Dec 14, 2013 2:20 PM, "Jim Lux" <jimlux@xxxxxxxxxxxxx> wrote: > On 12/14/13 4:55 AM, shane bounds wrote: > >> Hi, I'm building my first Tesla coil and was wondering if there is a >> certain frequency you should try to reach with respect to the power of >> your >> transformer? >> > > Not really. > > The frequency of the coil is fairly unimportant as long as it's not too > high or low (for a small coil, 200-400 kHz is typical). It's more > determined by the physical dimensions of the secondary winding. > > What you want to do is size the coil to the size of the power supply: too > big a coil driven by a small transformer is tough to get to work. > > A couple rules of thumb to get you started: > (and run a tesla coil simulation/design program like JavaTC) > > the longest sparks you're likely to get is 1.7*sqrt(power in watts) (in > inches). As a practical matter, a 12kV 30mA transformer is 360 W will > give you sparks about 2 feet long. > > > > You want the overall diameter of the toroidal electrode (top load) to be > at least 1/2 the height of the secondary coil, and more like equal. (at > least for small coils). So if your secondary is 2 feet long, a toroid 2 > feet in diameter would work. 1 foot will also work, but will be a bit > small. > > The height of the secondary winding (not necessarily the tube it's wound > on) should be 4-5 times the diameter of the winding. This is shorter and > more squat than a lot of pictures you'll see. A 4 inch diameter coil would > then have windings that are 18 inches long, on a form that's a few inches > longer (to give you some room to mount it. > > > Figure on winding about 600-800 turns of wire on the secondary. > > > > I found one formula, but I'm not sure about it,kHz= 3032.5xw^ > >> -2767 - 96.4, not sure what the ^ is or if the formulas accurate. I've got >> a 12kv 30 mA nst giving me 360 watts. I'm building it on paper first and >> trying to get a good understanding of it and at the moment my secondary >> will have a frequency of 322.6 kHz >> _______________________________________________ >> Tesla mailing list >> Tesla@xxxxxxxxxx >> http://www.pupman.com/mailman/listinfo/tesla >> >> > _______________________________________________ > Tesla mailing list > Tesla@xxxxxxxxxx > http://www.pupman.com/mailman/listinfo/tesla > _______________________________________________ Tesla mailing list Tesla@xxxxxxxxxx http://www.pupman.com/mailman/listinfo/tesla

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**References**:**[TCML] Is there an ideal frequency you should build around?***From:*shane bounds

**Re: [TCML] Is there an ideal frequency you should build around?***From:*Jim Lux

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