[Elecraft] [Elecraft_K3] K3 Beta Firmware Rev. 3.57: Synchronous AM Detection (AM-S); misc. improvements

[Joe Subich, W4TV]

I also notice that the tracking will lock up anywhere +/- 
25 cycles of nominal.  I've heard one case where AM sync 
did not sound particularly good ... that's with some of 
the metrological voice broadcasts on WWV/WWVH. Still that 
appears to be a case where the sync AM is amplifying an 
issue at the source because the normal envelope detector 
does not sound very good either. 

73, 

   ... Joe, W4TV 
 


> -----Original Message-----
> From: elecraft-bounces at mailman.qth.net 
> [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of drewko
> Sent: Thursday, November 12, 2009 8:37 AM
> To: Elecraft at mailman.qth.net
> Subject: Re: [Elecraft] [Elecraft_K3] K3 Beta Firmware Rev. 
> 3.57: Synchronous AM Detection (AM-S); misc. improvements
> 
> 
> I also think the sync det works great. My VFO locks 4 or 5 Hz 
> high using the 13 KHz filter. The 2.7 KHz filter locks right 
> on the money. Switching to the narrower filter will also lock 
> signals that are too weak to lock on the wide filter. Not 
> that you'd want to use the 2.7 filter for listening to AM broadcasts. 
> 
> 73,
> Drew
> AF2Z
> 
> 
> On Thu, 12 Nov 2009 03:59:38 -0600, Dale, K9VUJ wrote:
> 
> >Installed 3.57 this morning.  I am listening to Radio Zealand now, at
> >0945 Z on 9765 Khz.  Sync det seems to work very well.  I'm 
> trying it  
> >back and forth between AM and AM-S.  I am using the VFO 
> tracking and  
> >it locked right on, but my VFO display reads 9.764.991.  
> Perhaps I'll  
> >have to re-check calibration sometime, no biggie here.  I like this  
> >sync det.  It now makes me wish I had the 15 Khz filter in 
> addition to  
> >my 6 Khz. filter.
> >
> >Thankyou Elecraft for another flawless upload.  Am using the Mac and
> >that utility which also has been flawless here.
> >
> >73
> >Dale, K9VUJ
> >
> >
> 
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