[time-nuts] Super stable BVA Quartz resonators... BVA??
Richard (Rick) Karlquist
richard at karlquist.com
Fri Dec 7 18:52:15 EST 2007
Having low aging is nice, but the real problem is
frequency jumps. Do we know that they are the best
in that respect? If a crystal can jump 1E-10, then
that represents 10 days of aging all at once.
Rick Karlquist, N6RK
Didier Juges wrote:
> I am not aware of other crystal oscillators with better performance, so
> either I am missing something (the more likely explanation) or there is
> something to it.
>
> Maybe the cut is simply a smoke screen and the outstanding performance is
> actually due to other process detail(s) not disclosed?
>
> Or maybe their oscillators are not that good, they just blow smoke really
> well.
>
> Didier KO4BB
>
>> -----Original Message-----
>> From: time-nuts-bounces at febo.com
>> [mailto:time-nuts-bounces at febo.com] On Behalf Of Richard
>> (Rick) Karlquist
>> Sent: Friday, December 07, 2007 10:45 AM
>> To: Discussion of precise time and frequency measurement
>> Subject: Re: [time-nuts] Super stable BVA Quartz resonators... BVA??
>>
>> Reminds me of the "SC" cut crystal.
>> It either means "Stress Compensated" or "Santa Clara", where
>> it was discovered :-)
>>
>> The BVA has been around for a long time and you would think
>> that if there was really something to it, everybody would be
>> making them. Of course, they are very difficult to make.
>>
>> Rick Karlquist N6RK
>
>
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