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How to make, where to buy or retune, fine-tune 5-10-15-20 kHz band tuning forks (quartz or ceramic) ?

Thanks for response to my previous request. Followed each reply and still don't know how to make kHz tuning fork (as an electronic component). Queried Wikipedia for tuning fork.

by Meat Plow

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- crystals in MHz frequency band avaliable only.

by Rich Grise

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- binary counters

by Don Lancaster - Our lowest frequencies are 28.8 kHz, 108 kHz, 153.6 kHz, 250 kHz, 256 kHz, 307.2 kHz, 326.4 kHz plus hundreds of higher frequencies.

by whit.... For wristwatches, a tuning-fork is used, and one can micromachine it ..... from quartz and laser-trim its weighted tines for frequency and couple to it using the quartz material's piezoelectric properties. The typical resonators used for 5 kHz are tuning forks and guitar strings, or they aren't mechanical at all...

by Don Lancaster -

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LXO OSCILLATOR

10 kHz to 2.1 MHz Low Power Crystal Oscillator but picture comes from 2.0 MHzCrystal Oscillator
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clock oscillator only The characteristics of the 32.768 kHz model are presented in this data sheet. Are data sheets for lower frequencies also avaliable ?

by Bob Masta -

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Home of DaqGen, the FREEWARE signal generator

by Tim Shoppa- Digikey

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Catalog Section D - Crystals and Oscillators unfortunately, frequency range is MHz notr kHz Quartz Crystals - ECS-31 Series is for kHz range p- lowest frequency is

32.000 32.768kHz Tuning Fork Crystals lowest frequency offered non-programmable oscillator is for 20.000 kHz.

So is there no chance to make, order a non-programmable oscillator for kHz band

5 kHz, 10 kHz or the like to test wireless energy transfer by Tesla ?

Mayby a small, home arranged lab could micromachine or laser-trim a tuning fork to meet my needs or should I give up the idea of ordering samples of tunning forks with frequenciec in kHz band of my interest.

Reply to
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....... Phil

Reply to
Phil Allison

It seems you need a clock source at 5kHz / 10kHz / whatever. Just get an oscillator (or make your own with a crystal / tuning fork device / resonator) and divide it down.

I don't see anything difficult about that.

Cheers

PeteS

Reply to
PeteS

After doing some research using an internet search for "Tesla wireless energy", I understand a bit more about what you are trying to do. However, I don't know where you came up with frequencies in the kHz range. The wireless transmission of power on a global basis is proposed to be done at the resonant frequency of the earth and the ionosphere as a spherical cavity resonator, with a base frequency of 7.8 Hz (not kHz). Of course, you can transmit energy at just about any frequency, as evidenced by lighting fluorescent tubes in radar beams or near high voltage AC transmission lines. The fact that utility power lines radiate so much energy is a statement about their inefficiency, with losses of 30% or more. The Tesla method is supposed to be 90% to 98% efficient, but it appears to need very high potentials of several million volts, and relies on an extensive network of underground conductors to assure a solid earth connection, as well as high towers with special means to ionize the air above to connect to the ionosphere.

There appears to be some research already in progress to evaluate and promote Tesla's methods. The original project was halted by the investors (Vanderbilts) when it looked like it would not result in a profitable product or service, and similarly now there may be some "resistance" to perfecting such a system because of the loss of profits or reduced cash flow for energy companies and associated industries.

My main point here is that I don't think there is any need for a low frequency crystal or resonator to test Tesla's theories. They are large scale physical phenomena that operate at high power levels, and the transmitters and receivers are most likely going to be tuned circuits based on inductors and capacitors.

Good luck, but I think you would do better to contribute to some of the full scale research projects that are out there, and probably in need of funding or at least good publicity.

Paul

Reply to
Paul E. Schoen

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