Peter Davey Heater

[Digits]

hi every one I have also constructed one of these heaters and have to say you have got something here.

my amps ran at 3.5-4 after tuning and shifting the distance between the bells i managed to pull it down to 1-1.5 amps.
the time to bring my water to boil was halved.
i think with precision tuning we may do better.

i boil about a litre of water in 45s  to 1 minute don't know why the times differ though.

i am currently looking for better bells or domes and a better way to shift the distance.
i used two bicycle bells and PVC threaded rod this was the best i can do.

maybe ill have some good news in the future thanks guys for all the tips

[ggx9]

Hi Digits,

Thanks for posting the results of your work.

Are you running 220 volts 50Hz to the bells?  Were you able to check the resonant frequency of the bells before installation? Earlier postings indicated the bells must resonate at the frequency of the applied voltage. I think it would be difficult or impossible to make a bicycle bell to resonate at 50Hz and I don't think it is necessary as your test implies. My impression is that the distance between the bells is most critical with regard to the frequency. Can you describe the water you are using? Is it tap water or distilled with an electrolyte added or whatever?

Richard

[helmut]

hi every one I have also constructed one of these heaters and have to say you have got something here.

my amps ran at 3.5-4 after tuning and shifting the distance between the bells i managed to pull it down to 1-1.5 amps.
the time to bring my water to boil was halved.
i think with precision tuning we may do better.

i boil about a litre of water in 45s  to 1 minute don't know why the times differ though.

i am currently looking for better bells or domes and a better way to shift the distance.
i used two bicycle bells and PVC threaded rod this was the best i can do.

maybe ill have some good news in the future thanks guys for all the tips

@Digits

Good Job
Thanks for sharing.Can you add some pics or a sketch to have a visual imagination?

helmut

[Paul-R]

Hi Digits,

Thanks for posting the results of your work.

Are you running 220 volts 50Hz to the bells?  Were you able to check the resonant frequency of the bells before installation? Earlier postings indicated the bells must resonate at the frequency of the applied voltage. I think it would be difficult or impossible to make a bicycle bell to resonate at 50Hz...

...or any octave of this - i.e. 50hz, 100hz, 200hz, 400hz 800hz etc.

(in America, where they have mains at 60hz, it needs to be 60, 120, 240, 480hz etc)

A bicycle bell is likely to want the 400hz octave.

But cheap kitchen shops sell soup ladles and salad bowls which may well be much better.
With 50hz mains, you are looking to be a bit lower than G sharp, four frets up the highest
string of a guitar.

If you buy a set of pitch pipes for tuning a guitar, it will give you the G, and by
dinging the salad bowl in a shop, you may get in idea if it can be ground up to G sharp.
a salad bowl may give you a chance to aim for the 200hz or even the 100hz frequency.
Paul.

[NerzhDishual]

Hi Digits,

Thanks for sharing.
Your results sound very interesting.
Our amp consumption is very low and the fact that you
could, after tuning, had lowered you amp consumption
while halving the boiling time is amazing...
Can you use a watt meter?

Could you please post some pictures?

Best