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Author Topic: Magnetic Resonance Devices based on Don Smith Concepts  (Read 453349 times)

Yucca

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Re: Magnetic Resonance Devices based on Don Smith Concepts
« Reply #180 on: September 04, 2009, 10:19:46 PM »
Hi Yucca

Thanks for the comments.
I used grommet strip, see my post and picture on page 12 of this thread.
the grommet strip is quiet flimsey.
First i found a 3 inch tube, and it so happened i had been given a bottle of Glenfiddick Whiskey which came in a 3 inch carboard tube, so i first drank the whiskey over a 7 day period HICK Still got hangover LOL

I then tapped the grommed strips around the circumference, used a bakebean can from asda LOL to wind the coil first, i then transferred the 20 turn coil onto the Tube and into the grooves of the grommet strip.
I then applied 5 min epoxy glue into the grommet channels and let it harden.

I trimmed the ends of the coil noting how much length i took off to work out the final wire length.

The wire i used is tinned, i used this incase the enameled stops coupling to the atmosphere.

gyulasun
Thanks for this information it answers all my questions about how to use the GDO just need to get some hands on now ;)
The radio idea is great and will enable me to check the higher freq acuracy.

Yucca great stuff with the hands on ;) looks like i may need a better Sig Gen as mine only goes to 12mhz  :'(

 Very interesting the bridge doesn't alter the res freq.

Hi peter, the grommet strip worked great, I will get some for my next secondary coil.

MY HV diodes weren't conducting at the voltages being swung and showed no noticable extra C. I left the wires in place, but just disconnected them at the bridge connectors.

Maybe tuning this device is as simple as first get natural resonance of the secondary coil/s and then tune the primary to match, just like regular T coil only were working with more manageable output voltages.

I was lucky with my sig-gen recently on ebay usa:

Tektronix:
TM503 modular instrument cab with PSU
FG504 Func Gen(0...40MHz 10nS rise into 50 Ohm)
PG501 Pulse Gen(0...50MHz 10nS rise into 50 Ohm)

I gambled and bought it untested with no warranty or return policy, $160 + $60 ship to Eur. The seller didn't even know what it really was. When I turned it on first a thick plume of brownish smoke rose from the PG501, gutted!, but it was just a snubber cap across that must have gone short in storage, luckily everything works fine now and I've cleaned it inside and out and made a new main knob for it. Here's a pic I carry in my wallet :D

Peterae

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Re: Magnetic Resonance Devices based on Don Smith Concepts
« Reply #181 on: September 04, 2009, 10:46:31 PM »
Yucca
What a bargain nice 1.

I was bidding on a 1nF 2kv variable cap on ebay tonight but had to go out and was outbid  :'( ebay certainly can give up some bargains sometimes.


Yucca

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Re: Magnetic Resonance Devices based on Don Smith Concepts
« Reply #182 on: September 04, 2009, 11:07:55 PM »
Yucca
What a bargain nice 1.

I was bidding on a 1nF 2kv variable cap on ebay tonight but had to go out and was outbid  :'( ebay certainly can give up some bargains sometimes.

Peter, was that cap air or vacuum. If air then you probably wont get much more than 15MHz through it, which might well be good enough. Vacuum caps go easily up to 30MHz, but they're so damned expensive.

Maybe if your sig gen has square pulse then you could always hit the coil end with just the signal gen line at say 100kHz (no ground connection). Then putting your scope probe down on the bench say 4 inches away you may see ringdown at natural resonance freq.

Peterae

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Re: Magnetic Resonance Devices based on Don Smith Concepts
« Reply #183 on: September 04, 2009, 11:33:51 PM »
Yucca
yer it was air, i didn't realize they had a top freq, it's amazing how much we need to know when building this stuff, a fantastic way of learning anyway.

Wow just looked up Vacuum caps they look amazing, how do you adjust them?

Edit OH i see they still have an adjuster, i guess you fit a knob to the shaft


JENNINGS TECHNOLOGY COMPANY VACUUM VARIABLE CAPACITOR
• PN: CMV1-1000 - 0103 • Capacity Range: 8 - 1000pF
• Voltage (KV) Peak Test 3KV Test 3KV Working
• Current Amps (RMS) Max. 40A
• Type: Ceramic • Length: 4.33”
• Diam: 1.78” • Capacity vs Turns 10t = 8pF   0t = 1000pF
• Drive on TOP: Please Note, this is not ¼" Shaft, but a special "Spline" Cog Type Drive!! Click for large photo
• Frequency: 2 - 30MHz
• Brand New Item / Never been used. Unusual and very hard to find!
• Price:£125 (5pcs available) Click for large photo

stprue

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Re: Magnetic Resonance Devices based on Don Smith Concepts
« Reply #184 on: September 04, 2009, 11:55:27 PM »
@Yucca & Peterae

What do you think of this little test!!!  It is kinda like a small tesla hairpin circuit.  The interesting thing about it is that it is lighting an led on a different JT circuit...no contact.  Also you can see voltage reading off my DMM that's connected to my JT!  What are your thoughts on this?

Yucca

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Re: Magnetic Resonance Devices based on Don Smith Concepts
« Reply #185 on: September 05, 2009, 12:58:34 AM »
I now understand how he closes the loop and powers a load at the same time.

The 2 coil inductor after the secondary caps is used as a 1:1 air transformer.

He is using a pulsed load probably much like the inverter on the diagram that Yucca is building with the 2 transistors, which draws pulsed current from the secondary caps, in the positive line from the secondary caps and his pulsed inverter load is the inductor which has the pulsed load current flowing through it, this induces a fluctuating RF magnetic field which is then coupled to the second coil on that inductor which is then rectified smoothed and fed back to the 12 volt gelcel.

So the whole circuit is recharging while powering the main load, the more power that is drawn from the main load the more power is put back into the gelcell to drive the primary inverter and neon transformer.

I am going to guess that 1 of the coils on that final inductor slides closer to the primary to adjust the coupling and hence recharge power that feeds back to the gelcell.

This is very clever and is probably in place of the matching resisitor he uses in Yucca's build diagram which matches the final output inverter, but a resistor is lost energy to heat, but using this inductor instead of waste heat we get useful recharge current instead.

Peter

Peter, Interesting thought, it's a clever idea indeed. Thinking on that further maybe if the inverter switching were phase locked to the secondary coils natural resonance then oscillations could really be pumped? One can get to 20MHz easily with cheap N FETs.

Maybe the phase locking could be achieved with a small low ohm shunt in the inverter input line feeding a bandpass filter. Duty cycle could then be accomplished by turning the FET on at set phase angle and then turning off after a variable time.

The ideal phase angle to switch on I'm not sure.

I need to think about winding a two part secondary like yours. I need more wire and will get some grommet strip. First I'll try tuning what I've got for max efficiency.

Yucca

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Re: Magnetic Resonance Devices based on Don Smith Concepts
« Reply #186 on: September 05, 2009, 01:09:18 AM »
@Yucca & Peterae

What do you think of this little test!!!  It is kinda like a small tesla hairpin circuit.  The interesting thing about it is that it is lighting an led on a different JT circuit...no contact.  Also you can see voltage reading off my DMM that's connected to my JT!  What are your thoughts on this?

Nice experiment, that tiny HV module is very sweet, I want one! The spark gap's a beauty too!

The tiny red hairpin wire must be going at a hell of a lick lol, I'm suprised the blue base caps can keep up.

So the seperate JT is unpowered and in the vicinity and is lighting? Do you notice your hairpin neon dimming if you bring the JT coil very close to the hairpin?

Do you have another JT to put close by and see if power is shared or do they both light just as bright?

edit:
Do you have a scope available?

xee2

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Re: Magnetic Resonance Devices based on Don Smith Concepts
« Reply #187 on: September 05, 2009, 06:07:25 AM »
@ stprue

Does the neon light if you remove the red wire loop?


xee2

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Re: Magnetic Resonance Devices based on Don Smith Concepts
« Reply #188 on: September 05, 2009, 06:39:39 AM »
@ stprue

I like your spark gap. Did you make it?

Peterae

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Re: Magnetic Resonance Devices based on Don Smith Concepts
« Reply #189 on: September 05, 2009, 12:05:05 PM »
stprue

great hairpin build, you must be having real fun with that little baby  ;)

Just wondering how far away the JT lights the led.

Nice HV psu are you willing to share details on this as it could be very handy for driving the primary on Don's coils.

Yucca

The grommet strip certainly spaces the wire well, a tip is to make sure you push something like a ruler down it's length before gluing just to make it look nice and straight.

The problem i have with my theory on the 1:1 coil coupling is that he says he uses 60Hz for the final load conversion to drive presumably household devices, and i wouldn't imagine the 1:1 coil would work at such low freq's

It looks like he uses crisscrossed litz wire on that final inductor


stprue

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Re: Magnetic Resonance Devices based on Don Smith Concepts
« Reply #190 on: September 05, 2009, 02:59:57 PM »
Nice experiment, that tiny HV module is very sweet, I want one! The spark gap's a beauty too!

The tiny red hairpin wire must be going at a hell of a lick lol, I'm suprised the blue base caps can keep up.

So the seperate JT is unpowered and in the vicinity and is lighting? Do you notice your hairpin neon dimming if you bring the JT coil very close to the hairpin?

Do you have another JT to put close by and see if power is shared or do they both light just as bright?

edit:
Do you have a scope available?

Here is the little driver and it's worth the $4.95 

http://www.goldmine-elec-products.com/prodinfo.asp?number=G16565

I through this together quick but the neon won't light unless I'm touching it, it is reaching with me, so the more surface area of my fingers that are touching it the more it lights up.  It will also light if touch the caps as well and if I remove the red hiarpin wire it stays lit fully....I can actually see little electrical sparks inside it.  I haven't noticed this but after my spark gap is put together it will be a lot easier to test stuff.  Right now it's just placed by hand.

I wish I had a scope.

stprue

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Re: Magnetic Resonance Devices based on Don Smith Concepts
« Reply #191 on: September 05, 2009, 03:01:01 PM »
@ stprue

Does the neon light if you remove the red wire loop?

Yes it lights both side fully.

stprue

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Re: Magnetic Resonance Devices based on Don Smith Concepts
« Reply #192 on: September 05, 2009, 03:03:35 PM »
@ stprue

I like your spark gap. Did you make it?

No I wanted something accurate so I bought one.  Here is the link!  Lots of good stuff here but not always the cheapest.

http://www.amazing1.com/sparkgap.htm

stprue

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Re: Magnetic Resonance Devices based on Don Smith Concepts
« Reply #193 on: September 05, 2009, 03:08:17 PM »
stprue

great hairpin build, you must be having real fun with that little baby  ;)

Just wondering how far away the JT lights the led.

Nice HV psu are you willing to share details on this as it could be very handy for driving the primary on Don's coils.

Yucca

The grommet strip certainly spaces the wire well, a tip is to make sure you push something like a ruler down it's length before gluing just to make it look nice and straight.

The problem i have with my theory on the 1:1 coil coupling is that he says he uses 60Hz for the final load conversion to drive presumably household devices, and i wouldn't imagine the 1:1 coil would work at such low freq's

It looks like he uses crisscrossed litz wire on that final inductor

Thanks,
I just posted the link for the driver to Yucca.  I have a feeling that it has nothing to do with the JT now.  I am thinking that between the +- rails and my Dmm it's a short...so if I'm right it is lighting because it's using the +- rails on the breadboard to gather energy and the short make it work.

I could be completely wrong so I will test this today and get back with results.


stprue

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Re: Magnetic Resonance Devices based on Don Smith Concepts
« Reply #194 on: September 05, 2009, 03:48:59 PM »
@all

Looks like it is wireless!  Here is an led attached to an inductor and it is lit.  The other led on the +- rail was lit also and appeared to be the same brightness as the one on the inductor.  I can put 2 leds on the rail and they are lit very dimly.