Crystals for Free.

[chemelec]

I have Hundreds of them in these Frequencies.
They are FREE, Except for the Shipping Cost.
(Shipping Cost Depends on the Weight of Parcel and Your Location. *I Mail out from Canada*)

I Can't say much for their: +/- 1KHz though
Measuring 3 of the 305 ones, I get a Frequency of 293 KHz on all 3 of them.
Similar Off-Frequency Readings on the Other ones also.

[rickb]

Those are ceramic resonators not crystal.

[chemelec]

Sorry for the error, I stand corrected.

[dbanner]

I'm looking for 77 kilohertz for 1266x. Are there any in your lot thats close to 77Khz?

[chemelec]

Sorry No, Just those 4 values

[kt315]

I'm looking for 77 kilohertz for 1266x. Are there any in your lot thats close to 77Khz?

with divider you can get any freq.

[Sean_Goddard]

To be honest I would simply replace the crystal with a Wien Bridge oscillator with auto level control. I believe you are looking at a final frequency of 4.8KHz for a 1266 anyhow, so divide by 16 from 77K will give you this. I would go for a higher frequency and divide by 32.


I’m not sure if jitter will be a problem but I DO know that the 1266 had a very spectrally pure Tx (I’ve done FFT’s on it before) so maybe you could use something from here as a substitute http://www.changpuak.ch/electronics/Oscillators.php