Hi Pese,

Thanks a lot for your informations. I will test this device ASAP.
You mean this king of razor blades, I guess:
 

You may also know that, during WW1, these blades were also used as detectors
(diodes) to build radio receivers:
 
(http://freenrg.info/Pic/DetectRasoir.gif)

See:
http://dspt.club.fr/detecteurs.htm
http://www.carnets-tsf.fr/galene
In French, sorry.

Best

jes exactly this typ of rasoir blades.
Do it in cup of water with 2 wire. (i use this with 60watt blulb (lamp in serie to the 230 volt line (as as
"fuse" . so  no problem if the blades  will move ant make short cirbuit  in the cup..

THIS SYSTEM ist used , up to date , from "prisoniers" now in Germany (possible also over the world)

----------------
This circuit for "diode" detector receiver
(as crystal-receiver, i havnt seen before

First its not to understand, because an "Diode" as an semiconductor ist - in normal way- needed.
to metals "normally" will not do this.

BUT it exist knowledges mit soft iron that is ZINC layed !!

Possibly ist is used the razoir blat as neutral, and the used secuirity pin was an ZINC  plated device.
andso its used as an Diode  (or an negative resistance) effect , that i seen in some papers before...

Only this shown me THE WAY to "understand"

Gustav Pese

P.S.
I reed the french pages.
this reclicas was done wil galenea
and another with graphit from an pen.

possibly that can used for stronger CW "morse" transmitting ro receive (1945)
WW2 again

@Pese

...........................
Do it in cup of water with 2 wire. (i use this with 60watt blulb (lamp in serie to the 230 volt line (as as
"fuse" . so  no problem if the blades  will move ant make short cirbuit  in the cup..

Thanks a lot for these tips (and, BTW,  the others informations)

Best

Some who are with it may find this article helpful

http://www.physicstoday.org/pt/vol-54/iss-12/pdf/vol53no2p29-34.pdf

has anyone ever tried to make this device? , it looks fairly basic and surly it would be a great way to heat water for showers and heating., the only other thing ive seen come close is the Thrapp device, which seems to take a lot longer to do the job.

...any way i dont know much about it except what ive been reading, maybe some of you here know more about it,as in, its crap, its good, we just dont care.

If this device uses the 50Hz grid frequency to vibrate the bells why there is not even a slight noise coming from it? You can clearly hear the water boiling but no grid 50Hz noise on the video http://video.google.com/videoplay?docid=-1527526922275986120&hl=en and the presentation http://multimedia.stuff.co.nz/thepress/sonic/

Hi FatBird,

sounds logic. But Peter Davey seems to heat a great amount of water.

I hope some more people will experiment with it,
as the most energy is still used in a household to heat
water via electricity.

To goo OFFGRID we need a technology like this to save
for instance the battery bank in your house ( if you
now use solar power or any other means to recharge your lead acid
battery bank..)
to heat water more efficiently...

So did anybody experiment with it already ?

Many thanks.

Regards, Stefan.

The answer is seen in any stringed instrument, or tuning fork. For example, take 2 tuning forks of the same LENGTH and hit just one of them. Put that vibrating one near the other and the second one will start to vibrate also. You can also use a tuning fork of double the frequency and get the same effect. Take a guitar and strike the low E string (top string) without touching the others. Now stop the string you just stuck and listen to the high E (thinnest string) and it will be vibrating also even though it is at twice the frequency of the low E that you struck. Octaves (doubling or halving of the frequency demonstrates this the best. Take a wind chime and another wind chime exactly half the length of the first. Strike the bigger one and then put it near the one half it's length and then stop the big one from vibrating. The smaller one will be vibrating also even though it was never physically touched. All the same principle.

In this heater the electricity (mains) are oscillating at 50Hz. These bells Peter uses can't be 50Hz because they are too small. I guess them to be 800Hz or 1600Hz which are just octaves of 50Hz.

Someone here asked how to tune bells. Just like wind chimes, the smaller the bell the higher the frequency so start with something a little lower frequency than 1600Hz and then grind it down until you get to 1600Hz. If using 60Hz mains then the bells would need to be 1920Hz.

Then these bells will be vibrating in octave relation with the mains and you just need to adjust the distance between the two bells to find the sweet spot where the waves coming off each bell strike the other bell so as to not dampen IT'S vibration.

Same theory as to why you suspend a wind chime from a particular distance from the end so you hold it only on the node of the wave so you don't dampen the wave that is traveling up and down the wind chime.

Or think of it like two children swings but slow it down to visualize it. A swing (pendulum) will have a natural frequency determined by it's length. If you want to use the most minimal energy to continue the swing swinging then you need to push at the same frequency as this natural frequency of the swing.

With the 2 bells vibrating both at 1600Hz (in the case of 50Hz mains) and distanced from each other so the node of the waves strikes the opposite bell at exactly the right time and you make the water very hot very fast :-)