Author Topic: Magnetic Resonance Devices based on Don Smith Concepts (Read 455035 times)

Peterae · « **Reply #285 on:** September 21, 2009, 10:33:10 PM »

@forest
Yes they came from 2 videos i bought.

Yucca · « **Reply #286 on:** September 22, 2009, 01:05:15 AM »

Quote from: stprue on September 20, 2009, 05:43:03 PM

That sounds great im not sure what micro code is! Would it be compatible with a mac for loading? Very exciting.

Code as in software to upload to the microcontroller chip (using a USB cable) Yes you can upload code using a MAC, I develop on a MAC myself. To compile and upload code is simple, just install the needed application on your mac then import the source code and click one button and its done.

oscar · « **Reply #287 on:** September 22, 2009, 08:36:46 AM »

Hi Yucca and all,

thanks for keeping at it.

User Michael John Nunnerley on energeticforum posted a setup and experiment which might be connected to how Don Smith's center tapped output transformer works - part 16 in Smith's schematic here: http://www.overunity.com/index.php?topic=7679.msg192622#msg192622.

Michael John Nunnerley's original posting is here:
http://www.energeticforum.com/68531-post1.html

I will rephrase his posting:

All you need is a transformer with a center tap secondary of 12-0-12v and a primary of 240v or 120v depending on what is available in the country you live.
You will use the transformer in reverse, so that the original primary side will become the output side.

You also need a cap of 100nf a reed switch and a magnet. The circuit is shown below.

Make sure that your leads to the reed switch are long enough so as you can put some distance between the magnet and the transformer so that their magnetic fields will not interact.

Connect a meter to your pick up coil L3 (the original primary of the transformer) and set the meter to 200mv AC.

Take the reed switch and pass the magnet rapidly so as to make and break the contact.
See the voltage you are getting on the meter, it will be millivolts, what more did you expect

Now what is happening here?

If you look at the circuit you will see that when the switch is closed only L1 is in the cicuit, but when it is open L1+L2 are in the circuit. When we close the switch we change the inductance and capacitance aka resistance in the circuit. Changing these has caused a current to flow.

Other things are happening in this circuit as well but I will see if anyone can come up with them.

I can create over 700v on my setup!!!!!!!!!! Yes I do have to increase the circuit but there are some great possibilities for using this very simple but very important circuit.

Peterae · « **Reply #288 on:** September 22, 2009, 04:10:57 PM »

Theoretical guys here's a question or 2.

We are aiming for a quarter wave relationship between primary and secondary.

My secondary coil has 20 turns and is 528.5 cm long including tails. using a slightly bigger than 5 inch tube.

My primary using a slightly less than 2 inch tube for 5 turns is 86cm long without tails.

Do i make my primary wire length a quarter of the secondary length including tails, or is it without the wire used for the tails.

I suspect Don trimmed his secondary down to 19 turns from 20 maybe this was because of the reduced diameter of the primary.

Also

Is knowing the wire length enough to work out the natural freq of my coil, just convert wire length to wavelength or freq.

Peter

xee2 · « **Reply #289 on:** September 22, 2009, 06:22:06 PM »

@ Peterae

Quote from: Peterae on September 22, 2009, 04:10:57 PM

We are aiming for a quarter wave relationship between primary and secondary.

A 1/4 wavelength at 1 MHz is about 250 feet in air. Your coils do not seem long enough to be 1/4 wavelength in the frequency range of a Tesla coil.

Peterae · « **Reply #290 on:** September 22, 2009, 07:09:19 PM »

Hi xee
I am trying to replicate Don's device, without the caps the resonant freq will be much higher than 1mhz.
I thought Don was aiming for primary to be a quarter wavelength of the secondary coil, are you saying this is not so.

Peter

Peterae · « **Reply #291 on:** September 22, 2009, 08:16:42 PM »

OK i have found where Don says the primary needs to be an even division of the secondary wire length so it doesn't need to be a quarter, so my question is does this include the tails.
In Don's device i am building the primary has quiet long tails.

Peter

forest · « **Reply #292 on:** September 22, 2009, 08:21:52 PM »

Hmm..I thought that Don explains it well in videos. Instead I saw video in which he talks about making secondary 4 times longer then primary and that will be almost enough to catch resonance. Strange...
I have a strange feelings that we are mislead here.
If there is any simple way to catch resonant frequency by comparing primary and secondary length I can imagine only one, but completely different to what was told. I will make secondary 4 times shorter then primary (or in other words: primary 4 times longer then secondary) then match frequency of primary by selecting wavelength the same as primary length (full stationary wavelength on primary). That would accomplish resonance on primary very simple and secondary already would be 1/4 wavelength long.
The only task remain is to choose capacitor on secondary.

The only problem is that the described engineering task is in reverse to what Don Smith told us.
OR MAYBE we should choose other way and match wire length of PRIMARY to 1/4 wavelength and secondary to FULL wavelength

forest · « **Reply #293 on:** September 22, 2009, 08:29:00 PM »

Does somebody has schematics of neon tube transformer Smith is using and for dimmer for neon tube transformer ? How does it change frequency of input current to neon sign transformer ?

Peterae · « **Reply #294 on:** September 22, 2009, 08:38:29 PM »

OK i'm getting confused now, isn't a Tesla coil secondary a lot longer than the primary.

Definatley in Don's case the primary is a lot shorter than the secondary as is a tesla coil.

By dimming the input supply to the Neon transformer you alter the output voltage of the Neon transformer and therefore how fast the gap fires.

What i am trying to work out is, are the tails included in the division ratio of primary to secondary, so are the tails an active part, bearing in mind the primary resonant cap is connected to the end of the tails.

forest · « **Reply #295 on:** September 22, 2009, 09:01:46 PM »

Ok, I'm, also confused. I saw video in which Don says about L1 of internal PVC tube of this device should be exactly 1/4 of wire length used for L2 coil or external coil and that would simplify computation of resonant frequency because secondary would be almost tuned in such case.

Peterae · « **Reply #296 on:** September 22, 2009, 09:40:29 PM »

forest yer it's not so easy from what Don says and what is seen,
A few examples
That picture of the 0.047uf 6kv secondary cap is taken from a still frame as the camera zooms into it, at the time the camera zooms in he says the cap is 0.5uf LOL

another

He says the big paper/oil caps are wired in series when it is clear they are in parallel , he says they are 8uF 2kv, i bet they are 8kv 2uF LOL

One thing for sure i have counted the turns that primary coil is 5 turns on a 2 inch pipe and is therefore a lot smaller than the 19-20 turns 3 inch secondary so i guess it is indeed a quarter length.

But is it a quarter length including the tails or just the 5 turns?
I think it has to be including the tails, but does this make sense from a theoretical sense.
Peter

Yucca · « **Reply #297 on:** September 22, 2009, 10:03:15 PM »

Quote from: Peterae on September 22, 2009, 08:16:42 PM

OK i have found where Don says the primary needs to be an even division of the secondary wire length so it doesn't need to be a quarter, so my question is does this include the tails.
In Don's device i am building the primary has quiet long tails.

Peter

I have found through experiment that the wire length does seem to have an observeable effect, I didn't believe this at forst but it does seem so.

The sniffer coils I have ben placing around my rig seem best when the wire length is the same as the secondary wire length. I trim the sniffers with a small variable cap (like found in transistor radios). When the wire length is the same I find the neon is the brightest when I tune the cap for matched resonance. The cap is tuned very low only slightly over the C of the excited neon. Why wire length would be important I do not understand because you can pull any length wire L into resonance by tuning C, but it does seem to give stronger coupling when wire length is mathced, curious?

another off topic photo below, the proto gui for "TriForce" my planned 3 chan 0...60MHz pure sin sig gen. I will probably start another thread on this system I'm building to stop this thread being derailed (sorry for derailment so far)

edit for peter:
The tail length might be important, my sniffers have no tail just a neon and variable C directly on the circumference.

xee2 · « **Reply #298 on:** September 22, 2009, 10:14:33 PM »

@ Peterae

A few things you may already know but just in case.

1. Any short duration pulse will generate harmonics which depend on the pulse shape (Fourier transform provides solution if you know how to use that). A early technique of generating high frequencies was to use a pulse to generate harmonics and then capture the energy in one of the harmonics with a resonant circuit. He may have been doing something like that.

2. Tesla coil secondary is an LC resonant circuit, not a 1/4 resonant circuit. They work different.

3. At RF frequencies the leads are part of the circuit unless they are much less than a wavelength.

Peterae · « **Reply #299 on:** September 22, 2009, 10:18:33 PM »

Hi Yucca

Do i include the tails length as well as the 5 turns wire length to equal 1/4 of my secondary wire length.

nice GUI is that a dot matrix display, i ask because how did you get the menu at the bottom, what is the processor.

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Author Topic: Magnetic Resonance Devices based on Don Smith Concepts (Read 455035 times)

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