EMRFD Message Archive 5578

Message Date From Subject
5578 2010-12-26 18:03:07 Chris Waldrup Crystal question

> Hi Guys,
> I had a question about crystal stability. I normally use the full
> size HC-49 microprocessor crystals for the oscillators of projects I
> build. I see that the crystals available from Genesis Radio are the
> short case variety, about 1/4 as high as a normal full size one. Are
> these as stable as the full size ones? My QRP Labs 30 meter QRSS kit
> uses the short one, but I have not compared its stability to a full
> size crystal. I thought that the larger crystal size might give
> better results due to larger thermal mass. This is a question in
> general about crystals not specific to any project.
> Thanks.
> Chris