Electret experiments

[Inquorate]

Contraction

For 2cm high by 7cm diameter, less than half a millimeter if it's cooled slowly. And it likes cooling reeealy slowly.. Otherwise 1mm, but expect cracking to be a problem; add beeswax.

If you want to get it out of a mould, use pie tin foil. Or maybe vaseline would help, or baking paper. But that is adding a layer of dielectric..

Best wax is carnauba wax.

Still have my fingers crossed for mine, but I may have made them too thick.

Love and light

[sucahyo]

The neon was connected to oscillator on one leg, and when you added ground line to the other leg was when you got different readings?

I attach the picture. But after I rethink it again, maybe the low voltage reading happen because the current passing the neon is not completely directional when the neon and diode is not in closed loop.

I avoid full bridge rectifier because I think too many diode would reduce power.

[Inquorate]

I attach the picture. But after I rethink it again, maybe the low voltage reading happen because the current passing the neon is not completely directional when the neon and diode is not in closed loop.

I avoid full bridge rectifier because I think too many diode would reduce power.

actually, when you replace the recovery diode on a bedini coil (ie capturing the BEMF / radiant collapse of the coil) with a neon, the useable voltage (ie to charge a battery) is reduced approximately fivefold.

using a neon, i was getting 200v, using a diode, i was getting >1000 volts..

[ourbobby]

For 2cm high by 7cm diameter, less than half a millimeter if it's cooled slowly. And it likes cooling reeealy slowly.. Otherwise 1mm, but expect cracking to be a problem; add beeswax.

If you want to get it out of a mould, use pie tin foil. Or maybe vaseline would help, or baking paper. But that is adding a layer of dielectric..

Best wax is carnauba wax.

Still have my fingers crossed for mine, but I may have made them too thick.

Love and light

Thanks for that. Shall be making a few test core shortly. Referring to your previous logged videos and the availability of rosin. You might like to try Sportsbiz or Rebel Sports in Australia or similar sports stores elsewhere . It is the same type as that used by gymnastics and weightlifters for extra grip. CAUTION as when melting this produce is a health hazard and will affect the lungs. Use a WELL VENTILATED AREA PLUS FAN IF YOU HAVE ONE. See attached Hazard Notice sheet

I am also going to try substituting pure Turpentine for the rosin and and say 5% Stearic acid as a hardener. Turpentine comes up all over the place with early Radiant Energy devices.



Regards

[gyula]

Hi Folks,

Here is a good link with useful practical info on electrets, including T. T. Brown and Mototaro Eguchi works, (see also the pdf files at the bottom):

Electrets

rgds, Gyula

EDIT: I also found this paper: "Development of Epoxy-Based Electrets" : Other Composites and Related Materials go down to very bottom to open the pdf file

And the often quoted Scientific American paper is here:
Electret

[ourbobby]

Regarding the availability of White water Rosin. I have just been adviced that it is possible to use "Incense" as used by the Catholic Church -same product. Not the stick type comes in different fragrances and is good for the mossies!

[Inquorate]

Thanks for your contributions guys



your very helpful comments, links and suggestions are greatly appreciated.

[ourbobby]

Hi Guys,
Just persevering with the ROSIN! For those in Australia or New Zealand, there is a comapny on South Australia called Acromat. Do sporting supplies. Resin - for them - product number A15-84. currently $21 a kilo + freight. Website Acromat

Hope some of you find this helpful.

Regards

[Inquorate]

Ourbobby

I love you. Thankyou for persevering with the rosin quest, I'm a little ashamed that I'd given up..

You the man!

[ourbobby]

I love you. Thankyou for persevering with the rosin quest, I'm a little ashamed that I'd given up..

You the man!

You think that is persevering. I've had to cut my wife back to three times a night due to my research!! Hmmm.........

[Inquorate]

No luck

No charge on the Electrets, perhaps they are / were too thick for the voltage I was applying..

Back to the drawing board.

[morpher44]

electret whose polarization vectors are aligned

I was reading this:

http://jnaudin.free.fr/vta/vtabuild/index.htm

and noticed this statement about electret
(forgive me if someone already discussed this).

"An electret whose polarization vectors are permanently aligned
would be the analog to a permanent magnetic material and would
allow maximal lattice twisting. In ultrasonic transducer materials,
the stimulation could induce counter rotating, acoustical spinor waves
(King, 1993). If instead of a cylinder, a toroid is used, the spinor
waves can circulate and close into standing waves. If concomitant ZPE
displacement currents align with these counter rotating standing
waves, then the positive feedback of such coherence might induce a
sufficiently great ZPE interaction to produce a large gravitational
effect."

I'm not sure I fully understand all of that but it sounds cool!! :-)

Is the suggestion here to make a TOROID shaped Electret?

[rave154]

INQ,

a toroidal electret

if you do decide to have a go at making one, how about this.....
take one of those kids hollow plastic toroid donut things ( you know, that usually come in a set of descending sizes and multi colours )..

slice it ih half along the circumferance..and pour your wax mix into each half (leave slightly proud )..when set, remove from the mold...sand the surface??......and put em together to re-make the whole toroid.

OR.....could just take to toy, drill a wee hole in it...pour in the wax till its full, allow to set...and carefully use a craft knife to slice & peel away the mold piece by piece.

[morpher44]

toroidal electret

if you do decide to have a go at making one

So there is the mold/shape problem. But there is the further
problem of how to convey the field on to that shape.
Rather than putting that shape between two PLATES,
you might need to WRAP a COIL around the toroid, expose it
to the field while drying, and then remove the coil when done.
I think you want the field BENT-ROUND as it where.

Oh.... another idea. How about this?

Going around the toroid you could have a series of capacitive plates.
Lets say you used 21 coin-shapped plates creating 21 electret cells.
While the wax is drying the plates could be used to express the charge.
The plates could remain and would provide a capacitor-like
interface to your electret.

[Inquorate]

I even do a pretty mean dance for a nickel



Sounds good though. We'll see, once I have one working (I'm going to try a flat disc next), then all sorts of geometries are possible.

I'm also going to up the amps a little, maybe use the mechanical switch to trigger a transistor.

And I found my last 4 20kv diodes. And I have 15 20kv caps coming in the mail...

And going to make hv fly-back too.

Lots of fun coming soon