[Elecraft] RE: [Elecraft]12.09 crystals

Wed May 7 10:58:00 2003

It appears that the C in "-CD" stands for the +/- 10 ppm tolerance (i.e. how
close the actual value is to the quoted value at 25 deg C) and the D stands for
how much the value will vary over a (non-)given temperature range. I would
guess that they are saying that the frequency will vary +/- 100 ppm from
something like 30-120 deg F.

- Daniel/AA0NI

--- Sverre Holm - LA3ZA <[email protected]> wrote:
> I found this page on the ECS website: http://www.ecsxtal.com/pnumber.htm
> describing the part numbering system for their crystals. However, I
> cannot quite figure it out. The -S could be standard - and the C in CD
> could be +/- 10 ppm? 
> 
> Maybe some crystal gurus can explain?
> 
> 73, 
> Sverre
> 
> ------------------
> Sverre Holm, LA3ZA
> www.qsl.net/la3za
> 
> 
> 
> > -----Original Message-----
> > From: [email protected] 
> > [mailto:[email protected]] On Behalf Of David A. Belsley
> > 
> > Well, David, according to Gary, the ECS 12.09-CD is cut to 
> > have better 
> > temperature characteristics than the other varieties.  
> >
> > 
> > > What is the difference, Dave, between the ECS 12.09-S and the ECS 
> > > 12.09-CD xtals?
> > >
> 
> _______________________________________________
> Elecraft mailing list: [email protected]
> You must be a list member to post to the list. 
> Postings must be plain text (no HTML or attachments). 
> See: http://mailman.qth.net/mailman/listinfo/elecraft
> Elecraft Web Page: http://www.elecraft.com