Help: Where Can I find tuning forks for freq of 500~800 hz.

Musical tuning forks may get you close for some of the frequencies. They should be available in frequencies 440Hz * 2^(n/12) where n is a whole number (positive, zero, or negtive -- within reason).

For example:

A is 440.00Hz A# is 466.16Hz B is 493.88Hz C is 523.25Hz C# is 554.37Hz and so on.

However, I'm having a hard time finding chromatic sets (separated by the

You could probably trim them to get the exact frequency you wanted, but I'm not sure how well this would work.

Bob

Just curious. Is there some reason you don't use an oscilloscope to determine the frequency rather than a tuning fork??

Whether you mean Hz or kHz, wouldn't you be better off using DSP or some other signal processing method that's more compact (and precise) than a bunch of tuning forks?

What, exactly, are you trying to do?

That's interesting. I was reading "tuning fork" as in a frequency determining device. Don't some clocks (as in for reading time) use things referred to as "tuning forks" instead of crystals for keeping accurate time?

Michael

Those frequencies look like old pager or tone squelch fregencies. Motorola, Bramco and Ledex made the "reeds", which were mecahnicaly tuned, frequency selective relays. A simpler system was used for RC control, years ago.

Can't help you there, I know nothing about fancy clocks. I only have the cheap ones that either use the 60 cycle method or a crystal oscillator.

The Bulova Accutron used a tiny metal tuning fork with coils, in an oscillator.

You might be thinking of "tuning fork" crystals, were the crystal itself is in the shape of a tuning fork - that's how they can fit a 32.768KHz crystal into a can about the size of a tic-tac.

Cheers! Rich

There are such things as tunable tuning forks. I have seen them demonstrated. Moveable weights on the tines change the frequency. Here is one example, although an expensive one:

Al

Well, I guess if you need a machine to "align your brain waves", money is no object. ;-)

Cheers! Rich

Woowoowoowoowoowoowoowoowoo....

;-)

Al