How to make, where to buy, order 5 kHz, 10 kHz, 15 kHz crystal/ ceramic resonators

On Wed, 15 Nov 2006 11:34:36 -0800, la-la Has Frothed:

We have many tens of thousands of crystal oscillator modules in stock at fifty cents each.

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.

In general, it is usually cheaper and simpler to use a higher frequency and a CMOS binary divider.

Also in general, if your system does not use a crystal frequency of

Oops.

Should be 3.579545 of course.

On a sunny day (Wed, 15 Nov 2006 13:19:46 -0700) it happened Don Lancaster wrote in :

Poor guy ;-)

Don Lancaster wrote in news: snipped-for-privacy@mid.individual.net:

Where does 3.579545 MHz come from?

So, if I need a 4 MHz clock for a CPU, I should scrap it and make it a lot more complex to use a color burst crystal? How about those 10- MHz frequency standards? Show me a SIMPLE design for a TCXO to proved a low distortion 10 MHz signal from a 3.5795454545 crystal. Yes, i know that it can be done, but why? There are dozens of common, off the shelf crystal frequencies that are dirt cheap.

The speed of sound in quartz is (depending on shear vs. compression wave)

At 15 kHz, an AT quartz resonator would need to be (in size) about 200 times that,

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. Those are mechanical oscillators with non-quartz parts, but they still get called 'quartz resonators'. The common frequencies are mass-produced, and that means 32.000 kHz and 32.768 are available, but not the lower frequencies you ask about.

The typical resonators used for 5 kHz are tuning forks and guitar strings, or they aren't mechanical at all...

Not all of us are trying to build TV Typewriters for $5 or less, Don. :-)

But if you can find me some way to get VHF and low UHF signals down to a 45MHz IF with 32kHz and colorburst crystals, I'd love to hear it!

This guy came close , quartz ring, not a frisbee, but close :

Steve Roberts

Statek used to be the original source for tuning fork style crystals, which is what you need at low kilohertz frequencies.

In reality TV crystals are no cheaper than other popular frequencies.

I've normally used 4, 8, 12 and 16 MHz for my microcontoller designs and there have been no problems either sourcing them or with the price.

Graham

If you only need one or two, you can usually pull a crystal or two from a jun TV set for free. I probably have 100 on hand from dead TV sets.

there

I don't build stuff with salvaged parts though.

Graham

time you told us why you want one of this freq. Without that, who knows what options are most suitable. App, quantity, tolerance and so on.

NT

there

I will use them for prototypes, or to repair my personal equipment. The failure rate on crystals is so low that it doesn't make sense to buy a new part, when I have something on hand that is likely to outlast the equipment.

Why do you need crystals? A tunable audio generator, of function generator would work well at those frequencies.