Custom made crystals - Electronic Circuits Projects Diagrams Free

hantto · 9th March 2006, 06:58 PM

Hello!

Is it possible to order custom made crystals from somewhere? I would need some non-standard values. A 24.66875MHz and a 23.33125MHz. I guess no one is willing to make only a few. Does someone have additional knowledge about this?

stevez · 9th March 2006, 07:53 PM

I used to buy all of my special crystals from International Crystal Manufacturing. Their website suggests they can do what you want. There are a few guys who trim crystals for amateur radio use but I'm not sure just how good that process is - it can produce a nice, stable crystal but I'd question the relative precision of the frequency.

hantto · 9th March 2006, 07:58 PM

Quote:

Originally Posted by stevez

I used to buy all of my special crystals from International Crystal Manufacturing. Their website suggests they can do what you want. There are a few guys who trim crystals for amateur radio use but I'm not sure just how good that process is - it can produce a nice, stable crystal but I'd question the relative precision of the frequency.

Thank you! I'll take a look at their site.

Oznog · 9th March 2006, 09:23 PM

What are you driving here? It is a microcontroller?
Some of the more recent PICs have an onboard high accuracy clock generator that you can tune to specific frequencies.

justDIY · 9th March 2006, 09:32 PM

you can also check out digital oscillators, namely Maxim's EcnoOscillator ... it is digitally programmable to generate just about any frequency within its range (0 to 100mhz typ). It can also divide or multiply an external clock source, so if you get ahold of a crystal that is a harmonic of one of those freq, you can divide / multiple to get the result you seek.

JimB · 10th March 2006, 12:31 AM

Try this company in the UK

http://www.quartslab.demon.co.uk/

I have had crystals from them in single quantities, no problem.

JimB

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9th March 2006, 06:58 PM	(permalink)
hantto	Custom made crystals Hello! Is it possible to order custom made crystals from somewhere? I would need some non-standard values. A 24.66875MHz and a 23.33125MHz. I guess no one is willing to make only a few. Does someone have additional knowledge about this?

9th March 2006, 07:53 PM	(permalink)
stevez	I used to buy all of my special crystals from International Crystal Manufacturing. Their website suggests they can do what you want. There are a few guys who trim crystals for amateur radio use but I'm not sure just how good that process is - it can produce a nice, stable crystal but I'd question the relative precision of the frequency. __________________ stevez

9th March 2006, 09:23 PM	(permalink)
Oznog	What are you driving here? It is a microcontroller? Some of the more recent PICs have an onboard high accuracy clock generator that you can tune to specific frequencies. __________________ I thought what I'd do was I'd pretend I was one of those deaf-mutes.

9th March 2006, 09:32 PM	(permalink)
justDIY	you can also check out digital oscillators, namely Maxim's EcnoOscillator ... it is digitally programmable to generate just about any frequency within its range (0 to 100mhz typ). It can also divide or multiply an external clock source, so if you get ahold of a crystal that is a harmonic of one of those freq, you can divide / multiple to get the result you seek.

10th March 2006, 12:31 AM	(permalink)
JimB	Try this company in the UK http://www.quartslab.demon.co.uk/ I have had crystals from them in single quantities, no problem. JimB __________________ Experience is directly proportional to the value of the equipment ruined.