[Elecraft] K3 in AM-Sync Mode Receiving WWV

[Joe Subich, W4TV]

> I have observed that on the 10MHz WWV frequency only, that my 
> K3 will momentarily "unlock" with the frequency jumping either 
> up or down by as much as 200 Hz.  The frequency quickly, less 
> than a second, will be corrected, and all is well again.  
> This occurs at what appears to be entirely random timing, 
> from several minutes, to as often as a few seconds. 

The 10 MHz WWV may be the worst place to check the performance 
of the K3 Sync-AM.  I feel the 10 MHz WV transmitter has some 
apparent frequency modulation and audio distortion not present 
on any of the other frequencies (or on WWHV when I can hear it).  

On the other hand, I also detect the momentary "unlock" on the 
15 MHz WWV transmissions but those unlocks are associated with 
audible fading. 

73, 

   ... Joe, W4TV 
 



> -----Original Message-----
> From: elecraft-bounces at mailman.qth.net 
> [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Kenneth Moorman
> Sent: Monday, November 16, 2009 11:04 AM
> To: Elecraft at mailman.qth.net
> Subject: [Elecraft] K3 in AM-Sync Mode Receiving WWV
> 
> 
> I have been trying out the new AM-Sync mode by listening to 
> WWV on its 5 frequencies and am seeing something that I 
> wonder is a "problem" for my K3
> (#1292) or is it being seen by others as well.  I have 
> observed that on the 10MHz WWV frequency only, that my K3 
> will momentarily "unlock" with the frequency jumping either 
> up or down by as much as 200 Hz.  The frequency quickly, less 
> than a second, will be corrected, and all is well again.  
> This occurs at what appears to be entirely random timing, 
> from several minutes, to as often as a few seconds.  I 
> haven't noticed this happening on any of the other WWV 
> frequencies that I have observed, being all of the rest 
> except 2.5MHz which is not open to me this morning.  I did 
> notice this yesterday on 10MHz, but did not check the other 
> frequencies until today. I find it difficult to believe that 
> WWV is having "jumps" in its 10MHz transmission. Has anyone 
> else noticed this, or do I need to be giving Elecraft help 
> desk a call?
> 
> Ken, NU4I
> 
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