[Elecraft] K2 S/N 4787 First QSO

[Fraser Robertson]

Sorry, I don't understand this point.  The K2's I've tested fall down on LO 
phase noise performance.  Also note that the K2 measurements on the Sherwood 
web site state that the receiver performance is limited by phase noise.  I 
agree the RX works very well, but I've attracted comments on the air (when 
running QRO) re transmitted phase noise.  Surely the good receive 
performance is primarily due to having good selectivity near the front end.

Phase noise seems to be a taboo subject on here, attracting only personal 
replies.  Is there a way to bring it in line with other top rigs?

73 Fraser G4BJM

>
>One of the features that gives the K2 receiver its 'edge' in hearing weak
>signals over many of the other rigs is that the K2 does *not* use a
>fully-synthesized local oscillator. With that superior receive performance
>comes a trade-off: the K2 simply is not as stable as those other rigs with
>fully-synthesized L.O.s in crystal ovens. Still, current K2's are very, 
>very
>good, but it deserves a good 15-minute warm-up.
>

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