It's possible that there is some intermodulation between the timecode and the voice. What I'm hearing in Sync-AM sounds like clipping or crossover distortion that does not seem to be present on any other AM signal.
73, ... Joe, W4TV > -----Original Message----- > From: Jack Smith [mailto:jack.sm...@cliftonlaboratories.com] > Sent: Thursday, November 12, 2009 1:05 PM > To: li...@subich.com > Cc: 'drewko'; Elecraft@mailman.qth.net > Subject: Re: [Elecraft] [Elecraft_K3] K3 Beta Firmware Rev. > 3.57: Synchronous AM Detection (AM-S); misc. improvements > > > Joe: > > Could WWV/WWVH's 100 Hz time code subcarrier be part of the problem? > > Jack > > > Joe Subich, W4TV wrote: > > 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-boun...@mailman.qth.net > >> [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of drewko > >> Sent: Thursday, November 12, 2009 8:37 AM > >> To: Elecraft@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 > >>> > >>> > >>> > >> ______________________________________________________________ > >> Elecraft mailing list > >> Home: http://mailman.qth.net/mailman/listinfo/elecraft > >> Help: http://mailman.qth.net/mmfaq.htm > >> Post: mailto:Elecraft@mailman.qth.net > >> > >> This list hosted by: http://www.qsl.net > >> Please help support this email list: http://www.qsl.net/donate.html > >> > > > > ______________________________________________________________ > > Elecraft mailing list > > Home: http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/mmfaq.htm > > Post: mailto:Elecraft@mailman.qth.net > > > > This list hosted by: http://www.qsl.net > > Please help support this email list: http://www.qsl.net/donate.html > > > > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
