[Home][2013 Index] Re: [TCML] Is there an ideal frequency you should build around? [Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

# Re: [TCML] Is there an ideal frequency you should build around?

```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
```