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Author Topic: Magnetic Resonance Devices based on Don Smith Concepts  (Read 413448 times)

Offline Yucca

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Re: Magnetic Resonance Devices based on Don Smith Concepts
« Reply #105 on: August 24, 2009, 04:46:56 PM »
OK, I just tried turns ratio 3:24

Again I got almost nothing when trying to force half wave on the secondary. So I let it float and I presume it went into quarter wave.

I managed to get this nice scope shot of the 2 freqs involved here we can see the primary oscillating at 3.42MHz and the secondary as a lower contributer showing 606kHz.

So for device resonance I guess I need to tune these 2 freqs to be the same using cap changes and tap changes. Looks like I need a much bigger cap on the input stage for starters.

Offline onthecuttingedge2005

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Offline Peterae

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Re: Magnetic Resonance Devices based on Don Smith Concepts
« Reply #107 on: August 24, 2009, 08:41:23 PM »
The large grey capacitors are lower than 2500v DC because of the type and size of the terminals , i found a 4kv oil filled cap and it had massive ceramic insulation on the terminals, because of this i have just ordered 5 of these
1uf 2500vDC
height 4 5/8 inches
width 2 1/2 inches
thickness 1 1/2 inches
weight 0.5kg
I believe these to be higher voltage rating but maybe lower uf see attached picture.

I think we can do without the exact bertonee transformer for now.
I would like to know where to get the clip strips for the coil construction.

The guy selling the caps is in the uk and has 5 more left with postage it comes to £61.50 for the 5
Peter

Offline Peterae

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Re: Magnetic Resonance Devices based on Don Smith Concepts
« Reply #108 on: August 24, 2009, 09:12:09 PM »
I have now tracked down a supplier that has 5 of the exact large primary caps in stock, i have requested a quote for 2 of them, they are based in Florida and am not yet sure how much they are.

They are mica caps manufacturer is custom electronics
http://www.customelec.com/index.htm
« Last Edit: August 24, 2009, 10:28:25 PM by Peterae »

Offline Peterae

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Re: Magnetic Resonance Devices based on Don Smith Concepts
« Reply #109 on: August 24, 2009, 10:43:30 PM »
Yucca
Wow it was the cap changing value, i wouldn't have thought it should change much over it's operating temperature must have been getting pretty hot i guess.


Offline Yucca

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Re: Magnetic Resonance Devices based on Don Smith Concepts
« Reply #110 on: August 25, 2009, 04:51:08 AM »
Hi peter,

it was getting to maybe 50C, felt very warm but not hot, still comfortable to hold in the fingers.

Those big caps look like serious bits of kit, dont short them with a screwdriver it´d probably evaporate! I look forward to seeing if you can fill them at a fast rate, hope you can!

I´ve been playing with my rig a bit more, managed to get both primary and secondary oscillating at around 600kHz almost in tune. The transformer efficiency was reasonable, much less than 50% by my eye though. Interestingly I got most secondary power when I grounded the positive side of the bridge output (the node which 2 diodes point to) to my room radiator.

What I´d like to do is make a HV (20kV) cap module containing caps running in a power 2 series. so like 100pF 200pF 400pF 800pF 1600pF 3200pF 6400pF then also have a vacuum variable from 5 pf to 100pF. Using parallel combinations of these 8 caps can give any value of cap from 5pF all the way up to 12900pF at 1pF resolution or less. This is something I´d like to do but probably not for a while. It would be a nice bit of HV experimental kit though.

Offline onthecuttingedge2005

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Re: Magnetic Resonance Devices based on Don Smith Concepts
« Reply #111 on: August 25, 2009, 05:06:56 AM »
get some infra Red Goggles!

it will help you out a lot.

Jerry ;)

Offline Peterae

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Re: Magnetic Resonance Devices based on Don Smith Concepts
« Reply #112 on: August 25, 2009, 09:09:59 AM »

Those big caps look like serious bits of kit, dont short them with a screwdriver it´d probably evaporate!

  :o Still rolling around laughing  ;D

I look at these as an investment and if i ever needed to i guess i could resale them when i am done.

I like the idea of your cap bank, we may need something like this to find the value of the 2 mystery components in parallel, as well as tuning the primary and secondary coils.
What i am not yet sure is if he tuned 1 half of the secondary to the primary or the whole secondary, just seems strange he has the cap across one half in the device i am trying to build, i will try to do more ball park calcs today to see if it throws up some figures to work this out.

Are you in a position to move your primary coil realative to the secondary.

It's interesting the earth is making a difference.

keep up the good work, it sure is interesting.

Peter

Offline xenomorphlabs

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Re: Magnetic Resonance Devices based on Don Smith Concepts
« Reply #113 on: August 25, 2009, 01:25:34 PM »
  :o Still rolling around laughing  ;D

I look at these as an investment and if i ever needed to i guess i could resale them when i am done.

I like the idea of your cap bank, we may need something like this to find the value of the 2 mystery components in parallel, as well as tuning the primary and secondary coils.
What i am not yet sure is if he tuned 1 half of the secondary to the primary or the whole secondary, just seems strange he has the cap across one half in the device i am trying to build, i will try to do more ball park calcs today to see if it throws up some figures to work this out.

So you will design your device for a voltage maximum in the secondary circuit of 10 kV?
As long as i dont misunderstand the primary circuit the lightning arrester will limit the voltage
on the primary side to 250-400 Volt,  so if you keep also a 1:10 winding ratio the caps you ordered
should suffice.

About the connection of the cap across only one half of the secondary coil.
It seems odd and might represent how little we understand of Smith`s thoughts.
It is very difficult for me to understand how the oscillation/resonance is actually supposed to happen
with a complex circuit like that hehe. Too bad it can´t be that easily simulated in spice :/

Offline Peterae

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Re: Magnetic Resonance Devices based on Don Smith Concepts
« Reply #114 on: August 25, 2009, 02:20:37 PM »
Hi xeno

When i did a search for oil filled caps on ebay several designs and ratings came up, it was possible to see the relationship between terminal size and working voltage as was expected, so using the ebay pictures as a guide i came to the conclusion there is no way that the metal can caps he uses are over 2kv working voltage, for instance there was a 4kv cap on ebay and it's terminals were huge and made of ceramic see attached picture.

So there is no way he had any higher than 2kv and i would say no more than 1000vdc on those caps, also in the diagram that Yucca has been building he goes on to connect the smoothed DC onto an inverter using 2 transistors driving another transformer to get back to 125vac, these transistors would never survive with 2kv on them.

There seems to be a lot of little discrepancies and i think we will need to work through these as best as we can, ofcourse i could series those 5 caps i have for much higher voltage so that is an option if we need to go down that route.

I found out that people use whats called grommet strips to hold coils winds together like that, not quiet as neat as the ones he uses but they will do the same job.

I have ordered some 14swg and 18swg tinned wire for now.

My Dip meter arrived today  ;)

Peter




Offline xenomorphlabs

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Re: Magnetic Resonance Devices based on Don Smith Concepts
« Reply #115 on: August 25, 2009, 03:36:15 PM »
Peter,
you might be right there.
I have just asked me why Smith talks about the necessity for a 80 kV diode bridge in the diagram that you say yucca wants to build.
For some reason i also recall having read somewhere that one of these really was 20kV but i could be wrong.

Whatever hehe, i am sure yours will be good for a start.  ;) 

Offline Peterae

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Re: Magnetic Resonance Devices based on Don Smith Concepts
« Reply #116 on: August 25, 2009, 03:42:01 PM »
Lol xeno
I looked up the size of a 80kv diode and it was 120mm long

Offline xenomorphlabs

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Re: Magnetic Resonance Devices based on Don Smith Concepts
« Reply #117 on: August 25, 2009, 05:16:21 PM »
Lol xeno
I looked up the size of a 80kv diode and it was 120mm long
Well the big diode pair on the secondary in the image of the table device could be similarly long.  ;)
Also those were a custom part and they are not manufactured anymore.
The switching time was remarkably fast on them for high frequency.
The amperage through them was probably between 2 and 4 amps. thats why he put 2 in parallel.
So at 3 amps and 10kV for the cap, the output could hypothetically reach 30 KVA   ;D


Offline Paul-R

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Re: Magnetic Resonance Devices based on Don Smith Concepts
« Reply #118 on: August 25, 2009, 05:37:20 PM »
The large grey capacitors are lower than 2500v DC because of the type and size of the terminals , i found a 4kv oil filled cap and it had massive ceramic insulation on the terminals
re reply #107,
Are you sure these are not the 2kv 1 uF caps in microwave ovens? If so, they are likely to have
a 1 megohm resistor connected internaly across the poles.

Also, if this is what you want, you should be able to carry off as many as you want from your
local recycling centre for nothing. Especially if you offer to bring back separated useful recycling
materials for their use (steel case, glass in door)
Paul-R

Offline Peterae

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Re: Magnetic Resonance Devices based on Don Smith Concepts
« Reply #119 on: August 25, 2009, 09:58:13 PM »
Paul-R

All the microwave caps i have seen are not square in shape but have quiet rounded corners, These are Ex royal Airforce Dubilier Nitrogol caps probably deisned to be used in their UFO Fleet  ;D

Peter