[time-nuts] Small quantity custom crystals

Nick Foster nick at ettus.com
Thu Sep 30 20:50:35 UTC 2010

To ease the requirements on your crystal, you might consider using a
diode frequency multiplier to bring your oscillator frequency into that
range. Wenzel has a good app note on one variety:



On Thu, 2010-09-30 at 18:57 +0000, Mark Sims wrote:
> I need to build some small tracking transmitters (using a circuit similar to  http://www.jbgizmo.com/page4.html  
> This circuit uses a fifth overtone crystal to get an output in the 216 to 220 MHz range. The circuit is rather finicky about the crystal and transistor...  most don't work.   
> Smaller and more rugged crystals are preferred.  Does anybody know of a place that can make 1 off crystals in this range for a reasonable price.   Many of usual suspects don't seem to be able to make crystals in that range.
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