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Re: Akula, Ruslan, Stalker, device discussion and replications. « Reply #275 on: 2023-07-01, 10:43:48 »
Group: Elite Experimentalist
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Posts: 3823
Hi verpies, yes, good to see you around.
All,
There is a nice calculator to calculate the many parameters of a Tesla coil secondary / primary / top load:
http://www.classictesla.com/java/javatc/javatc.htmlWhen playing with it using a 37.5m long 0.8mm magnet wire (239 turns) on a 5cm diam. former and a 5 turns / 2.5mm diam. 13cm former primary (with a 690pF cap parallel) it shows the following data:
So we see a self resonance frequency of 3163kHz among many other parameters.
Input data used was:
We can even calculate the effect a top load will have like here where i used a cylinder as our Antenna top load.
I had to adjust the primary parallel capacitor to 2.4nF to get a good match between prim /secondary resonances with these data as result:
We see the resonance frequency has dropped to 1690kHz
Input data used was:
I am amazed by how close those resonance values are to my found resonance frequencies (1734kHz secondary alone, 3243kHz with my antenna connected)
Perhaps a good tool to play around with before building.
Itsu
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kacher sec prim result.png
* kacher sec prim result.png (24.39 kB, 928x848 - viewed 220 times.)
kacher sec prim input data.png
* kacher sec prim input data.png (28 kB, 1011x493 - viewed 220 times.)
kacher sec prim top load result.png
* kacher sec prim top load result.png (24.56 kB, 927x844 - viewed 222 times.)
kacher sec prim top load input data.png
* kacher sec prim top load input data.png (57.93 kB, 951x1001 - viewed 224 times.)