[Elecraft] Why is KX3 phase noise so much less than the K3 ?

[Larry Lopez]

http://www.sherweng.com/table.html

The LO Noise (dBc/Hz):

144 KX3
138 K3
130 R390A
121 FT-1000D
117 ICOM 720A


I'm wondering why the KX3 Lo noise is so much better than the K3.
The R390A value strange since the first local oscillator is a quartz
crystal.

I've owned a Icom 720A and own a FT-1000D.
Ive never owned a K3, KX3 or a R390A.

Larry




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