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

Posted by Larry Lopez on Apr 02, 2014; 12:40pm
URL: http://elecraft.85.s1.nabble.com/Why-is-KX3-phase-noise-so-much-less-than-the-K3-tp7586369.html

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