Peter Davey Heater

[storre]

@storre I really do not think that you should deal with all those details like teflon etc. Remember that if something works it will work in many different ways. We now know almost everything about this device. Just put together the same stuff that Davey did all simple materials screws and washers. BTW I also think that the tuned one is the inner one from what I read at the mentioned sites above.

I also agree with you to try a larger set of bells for larger amounts of water but hey; do you realize what a successful replication of a basic  setup means already?

Maybe I can find bell company around here

The teflon is just a convience to isolate the two bells. It can be done with a drilled out metal bolt from the outer bell with another solid metal bolt going down the middle and connecting to the inner bowl. Of course in this situation an insulator will need to be around the inner bolt so as not to contact the drilled out bolt that is securing the outer bell.

About securing the bell so it doesn't dampen it's ring -- I think it's not that important because at the center of the bell there will be very little or no vibration. Same as with a hanging tube that is ringing. There is at least one point where the wave crosses the zero point and that is where any good wind chime will be secured. I have many wind chimes that I've built and even though you can arrive at this hang point by calculating it. I just ring the chime and slide my finger up and down. It's very obvious the point that has no vibration. It's where the wave is passing the zero energy point. Same holds true for a bell.

@hartiberlin:
I've thought about stainless steel also but they would still have to be sized so they ring at a octave harmonic of the mains and I think they need to be nested inside of each other. Well now that I think about it, they could be facing each other like NS did with his heater connected to the HV secondary on his earth battery. Thrapp talked about how you can feel the spot to know the distance they should be apart from each other. I think it's the same theory as the water heater is using. The waves need to bounce off something at just the right point in the wave crest. Now sure if that is at the zero point or the top of the wave where it would have the highest energy. I think trial and error will be the quickest way and leave it to the math wizards to come up with the wave calculations

[edit] I didn't read all of your post so yes if you create your own pulsing instead of using the ac frequency then we could use standard size bowls and ring them to get their frequency and then pulse at exactly that frequency (probably best) or an octave above or below the bowl frequency.

[edelind]

I'll just ordered my stainless steel spheres. I hope I'll be able to tune them.

[storre]

I'll just ordered my stainless steel spheres. I hope I'll be able to tune them.

You are saying you will tune the bowls or tune the pulsing like hartiberlin suggested?

[ramset]

TUNE to what you have as  Stephan suggests     Or Thrapps device looked stainless? a dipole inside of 2 parabolas tune as Stephan says no hocus pocus just a heat sensor and play with frequency at close to what ever bowl size you chose if this is what is going on [resonance] Stephans idea can make any harmonic give these[Davies ]results   Chet

[devrimogun]

You are saying you will tune the bowls or tune the pulsing like hartiberlin suggested?
-----------------------------------
TUNE to what you have as  Stephan suggests     Or Thrapps device looked stainless? a dipole inside of 2 parabolas tune as Stephan says no hocus pocus just a heat sensor and play with frequency at close to what ever bowl size you chose if this is what is going on [resonance] Stephans idea can make any harmonic give these[Davies ]results   Chet

Friends please! Stefan might be technically right. But our first focus should be to replicate the original for which we have all the knowledge.
(I hope)
Once we have THE device then you could develop the alternative approaches.

Devrim