Peter Davey Heater

[forest]

I think that Davey device is simply an acoustic transducer with a shell,but in that case the proposed shape is misleading in my opinion. Someone with deeped knowledge should analyze when is the focal point of generated sound waves!

[storre]

If you are not a musician then it may be difficult unless you use a program to analyze the bell frequency. I believe you want it tuned to (depending on what your mains frequency is) (50, 100, 200, 400, 800, 1600) or (60, 120, 240, 480, 960, 1920) Hopefully your bell is a little lower than one of those frequencies. Then just slowly grind it down until you reach one of those frequencies. Of course the lower ones will be impossible but I just listed then to show the octave relationship to the mains.

[forest]

I have found very interesting behaviour of two bike bells loosely lying on then common rod. If you periodically rise and fall the outer bell over the inner one (letting him to fall down due to gravity) you will hear and feel strange vibration.

[NerzhDishual]

@Storre 

I have just quickly taken some pictures.
I almost ran out of batteries.
Sorry they are blurred.

http://freenrg.info/Sonettes_Davey/Davey_New_Exp_1.jpg
http://freenrg.info/Sonettes_Davey/Davey_New_Exp_2.jpg
http://freenrg.info/Sonettes_Davey/Davey_New_Exp_3.jpg
http://freenrg.info/Sonettes_Davey/Davey_New_Exp_4.jpg

No: I did not try any tuning.


Best

[storre]

@Storre 

No: I did not try any tuning.


Best

I thinking tuning is the key (pun intended) Do you have a way to compare the tone of one of the bells with a piano or guitar or check it with a frequency analyzer?