Here is a brief over view: 15kv, 120ma .0625uf mmc sync rotary gap @ 120 breaks/sec secondary - 7"dia x 27.3"lg 1500 turns No.26 wire Top load - 5" x 20" spun aluminum toroid primary - 10 turn 2 layer spiral Tesla equi drive circuit.There are two aspects of tuning and peaking that seem not to get the attention that they should (in my opinion). First is that if tuning with a signal generator and a oscilloscope you need to simulate the added capacitance of the spark. Adding a piece of wire the length of the spark your expecting to the top load and then tune with sig gen and o scope. This seems to be overlooked a lot. Java TC shows this very well. If you ad an additional cylindrical top load, on JTC, .02dia x length of spark (JTC will point it straight up) you will see a marked reduction in res. frequency. Second is that the safty gap or static gap width has a large impact on output. There are way of setting these gap for safest operation. However I'm guessing these gap widths get pushed a bit by savvy coilers but don't talk about it. At least on a sync rotary safety gap width has a big bearing on output. I would find it very interesting to hear what gap width people are using with what setup. And in full disclosure :) I have set both of my safety gaps at .22 using rounded brass draw pulls for electrodes. It just seems to take a lot of time to get every thing tweaked to Perfection.
Carry on David On 4/6/2015 9:34 AM, Timothy Gilmore wrote:
Has anyone put together any sort of a listing of others Tesla Coils built with parameters listed such as: (for example): I have 2 NSTs (15kv, 60ma) each, 6" diameter, 31" high secondary, torroid is .... I am getting 3-4' sparks and wondering if I should be getting longer sparks. Is this normal? or should I add another NST or bigger Toroid (working on an 8" diameter ducting bigger one). How do I know since the Tesla Map software says I should get "ideally" 72.6 inch sparks and I'm getting about 1/2 to 2/3 of that. Just wondering if it's not tuned properly (but I think it is) - or making a larger toroid is worth the effort if I'll gain a foot or more sparks. How does one know they are getting close to the best they can get in spark length? I have attached my Tesla Map file of current settings. Thanks, Tim _______________________________________________ Tesla mailing list Tesla@xxxxxxxxxx http://www.pupman.com/mailman/listinfo/tesla
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