Peter Davey Heater

[Sprocket]

I'm not sure I agree with that - while it may be 'synthetic', it is also a 'pure' sine wave, with none of the bizarre secondary frequencies that just serve to complicate things - just look at the 'real' sound spectrums of mine and ND's bells on this thread!  Also, any decent sound-chip nowadays will output a proper analogue soundwave, and not the digital 'stepped' constructs of days gone by...  So, if we are to assume that this works because standing-waves are being produced by harmonics of a 'pure' 50Hz sine-wave, it does not seem unreasonable to presume that 'something' might have happened with what I tried...  But it didn't - that I concede!

[forest]

I still believe that it may work but sonic response I had ONLY when I Used mostly insulated inner bell mounted very loosely on rod and sparks occured between rod and bell (whcih had a little uncovered metal are near rod). Current usage was also small : between 0.5 and 2A and I saw a tiny chain of bubbles coming out of my device through very small hole near rod output.A buzzu sound was also generated.

Later I polished my inner bell and mounted tightly. Current rised up to 10A and lights in my house started to blinking but result was worse.

Still in both cases there was no immediately boiling action...


I decided to stop further test with this device due to dangers of direct mains current.I plan to build rotaty of oscillatory working device aka pulse rotor to test mechanical cavitation at safe 12V design ;-)

[Paul-R]

Later I polished my inner bell and mounted tightly. Current rised up to 10A and lights in my house started to blinking but result was worse...

Why not try to pick up an inexpensive variac from Ebay? That way,
you could bring the voltage up from zero in a more orderly fashion.
Paul.

[ggx9]

To tune your bells or to check any audible frequency accurately and if you have speakers on your computer, spend no more money. Go to http://nch.com.au/tonegen/index.html and download their free tone generator. They have some nice software products at a good price, but for our purposes here you don't need them. If you connect an audio amplifier to your computer audio output you can use the nch software generator to run your Peter Davey heater at 50Hz or 50.01Hz or almost any other precision frequency you want. Try sine, square, triangle, sawtooth, pink or white noise. There is also a stereo option if you want to try running the two bells at different frequencies. Don't forget, if you run anywhere near 60Hz you can put a 60Hz transformer on the audio output amplifier and step your voltage/ current up and down. Be careful to protect your amplifier from inductive spikes from the transformer. Avoid sudden switching, rather adjust amplitude up and down gradually when turning on and off.

Richard

[NerzhDishual]

Hi Ggx9/Richard,

Thanks a lot for your informations.
Thanks also for 'resuscitating' (for a while?) this thread.

I have downloaded the software. It 'sounds' great.
For my part, and for the moment, I have given up my Davey's experiments.

I'm presently roasting some IRF250 trying to reproduce the
JL Naudin experiments about the Meyer WFC. (http://jnaudin.free.fr/wfc/)

Best

PS:  may I take advantage of this post to ask:
Is there any French/Breton guy over there?
How many are we interested in, and experimenting these 'OU subjects'?
I do not count in our best skeptics members of course.