Author Topic: primary coil support  (Read 1040 times)

Offline DaiKen

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primary coil support
« on: February 10, 2018, 08:20:05 PM »
Hi all,

In http://kaizerpowerelectronics.dk/tesla-coils/kaizer-drsstc-i/ Mads writes: 'I do not recommend anyone to make the same primary coil supports' and I have some trouble finding a working alternative.

Suggestions, advice & tips are very welcome.

Kind regards,

Ton

Offline Mads Barnkob

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Re: primary coil support
« Reply #1 on: February 11, 2018, 07:26:16 PM »
What I meant was the through-hole solution, because it is very hard work to get it screwed into position.

You can do almost exactly the same, but then saw down through the holes, just a little off centre so you get a little snap-in to hold the tubing in place, or you can also drill small holes behind the slots to fix the coil into position with a small piece of wire or so. Take a look at my DRSSTC4 f.ex.

But I do recommend make flat spiral primary coils for DRSSTCs, they provide plenty of coupling and gets further away from the topload.
http://www.kaizerpowerelectronics.dk - Tesla coils, high voltage, pulse power, audio and general electronics

Offline DaiKen

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Re: primary coil support
« Reply #2 on: February 11, 2018, 08:15:10 PM »
Hi Mads,

Thanks for your reply. That's just what I read, and looking at the pictures I can imaging the difficulties.

Making a flat spiral coil for a coil based on your DRSSTC1, can I use the same amount of windings?

Offline Mads Barnkob

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Re: primary coil support
« Reply #3 on: February 11, 2018, 10:24:31 PM »
You don't even need so many turns, as it will be tapped at a much lower number of turns, in the range of 5-6 turns in order to de-tune the primary below secondary resonant frequency.

On http://kaizerpowerelectronics.dk/calculators/spiral-coil-calculator/ I plotted these numbers and that seems to be a good enough solution for DRSSTC1, you can change the distance between turns if its getting too big, but too small also makes it harder to tune with a large tap connection.

http://www.kaizerpowerelectronics.dk - Tesla coils, high voltage, pulse power, audio and general electronics

Offline DaiKen

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Re: primary coil support
« Reply #4 on: February 12, 2018, 03:44:13 PM »
Thanks Mad!

Like it very much you took the effort to make this calculation!

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Re: primary coil support
« Reply #4 on: February 12, 2018, 03:44:13 PM »

 


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