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Forums
4hv.org :: Forums :: Tesla Coils
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Calculating a tesla coil's resonant frequency?

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StormInABottle
Wed Oct 30 2013, 08:25PM Print
StormInABottle Registered Member #9252 Joined: Fri Jan 04 2013, 06:27AM
Location: Andromeda
Posts: 253
 		The tesla coil is 12 inch wide and 12 inch long (Yes that is written right)
And wound using 26 gauge wire.
What would the resonant frequency be?
Also it would be a CW SSTC
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Hazmatt_(The Underdog)
Thu Oct 31 2013, 01:57AM
Hazmatt_(The Underdog) Registered Member #135 Joined: Sat Feb 11 2006, 12:06AM
Location: Anywhere is fine
Posts: 1735
 		Are you guys really that lazy?

Link2

Building Tesla Coils does require that you put in effort, and almost everything you want to know is here, including calculating LTR values!

Do the work.
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redruM69
Thu Oct 31 2013, 02:50AM
redruM69 Registered Member #31557 Joined: Tue Aug 06 2013, 02:38AM
Location:
Posts: 58
 		I'll be a little kinder. Assuming no topload, about 141khz.
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twist2b
Thu Oct 31 2013, 10:57PM
twist2b Registered Member #2086 Joined: Tue Apr 21 2009, 02:33AM
Location:
Posts: 117
 		Just out of curiosity, WHY WOULD YOU WANT A 1:1 RATIO?! That's crazy and lossy. You are not building a tesla coil are you?
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Dr. Dark Current
Fri Nov 01 2013, 10:41AM
Dr. Dark Current Registered Member #152 Joined: Sun Feb 12 2006, 03:36PM
Location: Czech Rep.
Posts: 3384
 		JAVATC. If you know how to use it, you get very accurate result. The lambda/4 method gives very inaccurate results, just a "ball park" value.
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StormInABottle
Mon Nov 11 2013, 01:44PM
StormInABottle Registered Member #9252 Joined: Fri Jan 04 2013, 06:27AM
Location: Andromeda
Posts: 253
 		Twist.
I am going to build an SSTC..
But i just want the lowest resonant frequency possible.. Less than 100khz..

DrDarkCurrent

I use tesla coil CAD 2.0
I might just also use piratebay to grab a tesla map version.
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HV Enthusiast
Mon Nov 11 2013, 03:46PM
HV Enthusiast Registered Member #15 Joined: Thu Feb 02 2006, 01:11PM
Location:
Posts: 3068
StormInABottle wrote ...

Twist.
I am going to build an SSTC..
But i just want the lowest resonant frequency possible.. Less than 100khz..

DrDarkCurrent

I use tesla coil CAD 2.0
I might just also use piratebay to grab a tesla map version.

Well, if you want the lowest fres possible, you are using the wrong wire. For lowest fres possible, use the smallest wire you can find. I would recommend 30-34AWG. 34 AWG is very thin, but still manageable.
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twist2b
Mon Nov 11 2013, 04:20PM
twist2b Registered Member #2086 Joined: Tue Apr 21 2009, 02:33AM
Location:
Posts: 117
 		If you want low resonance like EVS said use higher AWG, but don't go to 34... after 30 it starts getting lossy... Here is a graph that gives you an idea of how to improve your secondary to have low frequency and not be lossy due to skin or proximity:


16 Am
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loneoceans
Mon Nov 11 2013, 05:06PM
loneoceans Registered Member #4098 Joined: Fri Sept 16 2011, 09:26PM
Location:
Posts: 236
twist2b wrote ...

If you want low resonance like EVS said use higher AWG, but don't go to 34... after 30 it starts getting lossy... Here is a graph that gives you an idea of how to improve your secondary to have low frequency and not be lossy due to skin or proximity:


16 Am



That's an interesting graph. Twist2b, where did you get that from? Is it part of a larger document?
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StormInABottle
Mon Nov 11 2013, 07:57PM
StormInABottle Registered Member #9252 Joined: Fri Jan 04 2013, 06:27AM
Location: Andromeda
Posts: 253
 		Isn't 30 awg too thin for a cw sttc running at ~6000/8000 watts?
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