[Elecraft] Upgrade question

[Don Wilhelm]

Jim,

The 'old' crystals were used in K2s prior to SN 2560, so if your SN is 
higher, you have the newer crystals.
The old crystals quality was not inferior - as quality is normally 
measured for crystals used for oscillators and such.  However, Elecraft 
tightened the specs on the motional parameters with the crystal 
manufacturer, and the new crystals are more tightly controlled for the 
parameters that matter most in a crystal filter.

73,
Don W3FPR

Jim Giercyk wrote:
> I guess the next logical question would be, "What's the difference between the old and new crystals?".  Were the older crystals of inferior quality?  Thanks to everyone,
>
> Jim
>   
>