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

[wayne burdick]

K3 beta-test firmware revision 3.57 (with DSP rev. 2.45) is now  
available.

This revision includes Synchronous AM detection, which has a clear  
advantage over the regular AM detector during selective fading. In  
this mode, the K3 can optionally track AM stations that may be  
slightly mistuned, as you might find in an AM round-table on 75 m.  
It's also convenient for automatically zeroing in on AM broadcast  
stations.

There are other considerations when using Synch AM, so you should read  
the release notes (below) before trying it. We'll be further refining  
our AM-S implementation in a later release, based on your feedback.

Please send any questions to [hidden email]. For instructions  
on how to load beta firmware, see:

      http://www.elecraft.com/K3/k3_software.htm

73,
Wayne
N6KR

* * *

MCU 3.57 / DSP 2.45, 11-7-2009

Misc. Improvements:

* TUNE SWITCH:  “Double beep” with NR on eliminated.

* DATA A: Loss of power when using TUNE corrected.

New Feature: Synchronous AM Receive

* SYNCHRONOUS AM: Outperforms regular AM during selective fading.
Provides optional automatic VFO tracking of AM signals up to +/- 2.5  
kHz.

Select AM mode, then hold ALT to select AM-S. The -S icon flashes
slowly if the signal is noisy. Select AM-S LSB or USB using SHIFT;
one of the two sidebands may reduce QRM. Sync AM also works with
diversity receive. (Note: Some AM broadcast stations encode their
carrier, resulting in a low-pitched noise when Sync AM is turned on.)

With Sync AM you can tune manually, or use automatic VFO tracking:

-- If tuning manually, you need to tune to within +/- 10 Hz of the  
actual
    carrier frequency, at which point the K3 will phase-lock to the  
carrier.

-- To enable VFO tracking, tap CWT, which turns on the T icon. Or,
    tap SPOT to engage VFO tracking just long enough to lock. When
    tracking is on, the VFO may “hunt” slowly across a span of several  
Hz.

IMPORTANT:  For AM QSOs, use SPLIT mode when VFO tracking is
turned on. VFO B (TX) will remain fixed while VFO A tracks RX signals.

Limitations: At present, VFO B cannot auto-tune in AM-S. Also, both
VFOs will always be in the same mode (AM-S LSB or USB).

Remote Control Command Changes:

* UP0/DN0/UP$0/DN$0 moves VFOs 1 Hz. Similarly, UP8 and UP9
move the VFOs by 100 and 200 Hz, respectively.


______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

[David F. Reed-2]

I tried this out tonight; WWV on 10 and 5 MHz; found that at this time,
Synchronous USB was better than LSB, and using CWT to auto-track showed
as much as 7 Hz offset in tracking.  It was very interesting and I look
forward to using it more for SWL in tough conditions.  Thanks!

73 de Dave, W5SV

Wayne Burdick wrote:
> K3 beta-test firmware revision 3.57 (with DSP rev. 2.45) is now  
> available.
>
> This revision includes Synchronous AM detection, which has a clear  
> advantage over the regular AM detector during selective fading. In  
> this mode, the K3 can optionally track AM stations that may be  
> slightly mistuned, as you might find in an AM round-table on 75 m.  
> It's also convenient for automatically zeroing in on AM broadcast  
> stations.
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

[Richard Jones - KJ5QY]

I have been using the Sync tonight on several AM SW stations.  I have had very good results so far.  Depending on the QRM the USB & LSB do make a great difference.  I have been waiting for this feature!

Thanks,

Rick  --  KJ5QY

wayne burdick wrote

K3 beta-test firmware revision 3.57 (with DSP rev. 2.45) is now  
available.

This revision includes Synchronous AM detection, which has a clear  
advantage over the regular AM detector during selective fading. In  
this mode, the K3 can optionally track AM stations that may be  
slightly mistuned, as you might find in an AM round-table on 75 m.  
It's also convenient for automatically zeroing in on AM broadcast  
stations.

There are other considerations when using Synch AM, so you should read  
the release notes (below) before trying it. We'll be further refining  
our AM-S implementation in a later release, based on your feedback.

Please send any questions to [e-mail]. For instructions  
on how to load beta firmware, see:

      http://www.elecraft.com/K3/k3_software.htm

73,
Wayne
N6KR

* * *

MCU 3.57 / DSP 2.45, 11-7-2009

Misc. Improvements:

* TUNE SWITCH:  “Double beep” with NR on eliminated.

* DATA A: Loss of power when using TUNE corrected.

New Feature: Synchronous AM Receive

* SYNCHRONOUS AM: Outperforms regular AM during selective fading.
Provides optional automatic VFO tracking of AM signals up to +/- 2.5  
kHz.

Select AM mode, then hold ALT to select AM-S. The -S icon flashes
slowly if the signal is noisy. Select AM-S LSB or USB using SHIFT;
one of the two sidebands may reduce QRM. Sync AM also works with
diversity receive. (Note: Some AM broadcast stations encode their
carrier, resulting in a low-pitched noise when Sync AM is turned on.)

With Sync AM you can tune manually, or use automatic VFO tracking:

-- If tuning manually, you need to tune to within +/- 10 Hz of the  
actual
    carrier frequency, at which point the K3 will phase-lock to the  
carrier.

-- To enable VFO tracking, tap CWT, which turns on the T icon. Or,
    tap SPOT to engage VFO tracking just long enough to lock. When
    tracking is on, the VFO may “hunt” slowly across a span of several  
Hz.

IMPORTANT:  For AM QSOs, use SPLIT mode when VFO tracking is
turned on. VFO B (TX) will remain fixed while VFO A tracks RX signals.

Limitations: At present, VFO B cannot auto-tune in AM-S. Also, both
VFOs will always be in the same mode (AM-S LSB or USB).

Remote Control Command Changes:

* UP0/DN0/UP$0/DN$0 moves VFOs 1 Hz. Similarly, UP8 and UP9
move the VFOs by 100 and 200 Hz, respectively.


______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[e-mail]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

[VE3NFK]

Hi Wayne

This was one of the features that I 'really' wanted in the K3 and I am so pleased it works so well..
Enjoying my SW listening all the more now
Thanks!

73  John VE3NFK

wayne burdick wrote

K3 beta-test firmware revision 3.57 (with DSP rev. 2.45) is now  
available.

This revision includes Synchronous AM detection, which has a clear  
advantage over the regular AM detector during selective fading. In  
this mode, the K3 can optionally track AM stations that may be  
slightly mistuned, as you might find in an AM round-table on 75 m.  
It's also convenient for automatically zeroing in on AM broadcast  
stations.

There are other considerations when using Synch AM, so you should read  
the release notes (below) before trying it. We'll be further refining  
our AM-S implementation in a later release, based on your feedback.

Please send any questions to [e-mail]. For instructions  
on how to load beta firmware, see:

      http://www.elecraft.com/K3/k3_software.htm

73,
Wayne
N6KR

* * *

MCU 3.57 / DSP 2.45, 11-7-2009

Misc. Improvements:

* TUNE SWITCH:  “Double beep” with NR on eliminated.

* DATA A: Loss of power when using TUNE corrected.

New Feature: Synchronous AM Receive

* SYNCHRONOUS AM: Outperforms regular AM during selective fading.
Provides optional automatic VFO tracking of AM signals up to +/- 2.5  
kHz.

Select AM mode, then hold ALT to select AM-S. The -S icon flashes
slowly if the signal is noisy. Select AM-S LSB or USB using SHIFT;
one of the two sidebands may reduce QRM. Sync AM also works with
diversity receive. (Note: Some AM broadcast stations encode their
carrier, resulting in a low-pitched noise when Sync AM is turned on.)

With Sync AM you can tune manually, or use automatic VFO tracking:

-- If tuning manually, you need to tune to within +/- 10 Hz of the  
actual
    carrier frequency, at which point the K3 will phase-lock to the  
carrier.

-- To enable VFO tracking, tap CWT, which turns on the T icon. Or,
    tap SPOT to engage VFO tracking just long enough to lock. When
    tracking is on, the VFO may “hunt” slowly across a span of several  
Hz.

IMPORTANT:  For AM QSOs, use SPLIT mode when VFO tracking is
turned on. VFO B (TX) will remain fixed while VFO A tracks RX signals.

Limitations: At present, VFO B cannot auto-tune in AM-S. Also, both
VFOs will always be in the same mode (AM-S LSB or USB).

Remote Control Command Changes:

* UP0/DN0/UP$0/DN$0 moves VFOs 1 Hz. Similarly, UP8 and UP9
move the VFOs by 100 and 200 Hz, respectively.


______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[e-mail]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

[DaleJ]

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


On 10, Nov 2009, at 20:33, Wayne Burdick wrote:

> K3 beta-test firmware revision 3.57 (with DSP rev. 2.45) is now
> available.
>
> This revision includes Synchronous AM detection, which has a clear
> advantage over the regular AM detector during selective fading. In
> this mode, the K3 can optionally track AM stations that may be
> slightly mistuned, as you might find in an AM round-table on 75 m.
> It's also convenient for automatically zeroing in on AM broadcast
> stations.
>
> There are other considerations when using Synch AM, so you should read
> the release notes (below) before trying it. We'll be further refining
> our AM-S implementation in a later release, based on your feedback.
>
> Please send any questions to [hidden email]. For instructions
> on how to load beta firmware, see:
>
>      http://www.elecraft.com/K3/k3_software.htm
>
> 73,
> Wayne
> N6KR
>
> * * *
>
> MCU 3.57 / DSP 2.45, 11-7-2009
>
> Misc. Improvements:
>
> * TUNE SWITCH:  “Double beep” with NR on eliminated.
>
> * DATA A: Loss of power when using TUNE corrected.
>
> New Feature: Synchronous AM Receive
>
> * SYNCHRONOUS AM: Outperforms regular AM during selective fading.
> Provides optional automatic VFO tracking of AM signals up to +/- 2.5
> kHz.
>
> Select AM mode, then hold ALT to select AM-S. The -S icon flashes
> slowly if the signal is noisy. Select AM-S LSB or USB using SHIFT;
> one of the two sidebands may reduce QRM. Sync AM also works with
> diversity receive. (Note: Some AM broadcast stations encode their
> carrier, resulting in a low-pitched noise when Sync AM is turned on.)
>
> With Sync AM you can tune manually, or use automatic VFO tracking:
>
> -- If tuning manually, you need to tune to within +/- 10 Hz of the  
> actual
>    carrier frequency, at which point the K3 will phase-lock to the
> carrier.
>
> -- To enable VFO tracking, tap CWT, which turns on the T icon. Or,
>    tap SPOT to engage VFO tracking just long enough to lock. When
>    tracking is on, the VFO may “hunt” slowly across a span of several
> Hz.
>
> IMPORTANT:  For AM QSOs, use SPLIT mode when VFO tracking is
> turned on. VFO B (TX) will remain fixed while VFO A tracks RX signals.
>
> Limitations: At present, VFO B cannot auto-tune in AM-S. Also, both
> VFOs will always be in the same mode (AM-S LSB or USB).
>
> Remote Control Command Changes:
>
> * UP0/DN0/UP$0/DN$0 moves VFOs 1 Hz. Similarly, UP8 and UP9
> move the VFOs by 100 and 200 Hz, respectively.
>
>
>
>
> ------------------------------------
>
> Yahoo! Groups Links
>
> <*> To visit your group on the web, go to:
>    http://groups.yahoo.com/group/Elecraft_K3/
>
> <*> Your email settings:
>    Individual Email | Traditional
>
> <*> To change settings online go to:
>    http://groups.yahoo.com/group/Elecraft_K3/join
>    (Yahoo! ID required)
>
> <*> To change settings via email:
>    [hidden email]
>    [hidden email]
>
> <*> To unsubscribe from this group, send an email to:
>    [hidden email]
>
> <*> Your use of Yahoo! Groups is subject to:
>    http://docs.yahoo.com/info/terms/
>

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

[drewko]

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:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

[Bill N2BC]

Interesting to hear & watch the Sync mode zero in on AM stations as they
'pass it around'  !!

Anybody else hearing a clicking noise while turning the SHIFT or WIDTH
controls?

73, Bill   N2BC     (K3/00929)

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

[Dave Van Wallaghen]

Hi Bill,

Yes, I've noticed that also. But, I've always had some clicks when
adjusting filter widths and shifting for the last half dozen or so
firmware upgrades. I have serial #338 here. Not sure if that makes a
difference or not.

As a side note: Thanks Wayne for a very nice feature. A side effect I
found right off is that is you are a LP-Pan/Power SDR user, you can
click on AM stations with the accuracy of throwing a grenade and the K3
will lock in for you without manually getting closer on the tuning dial ;-)

73,
Dave W8FGU


Bill wrote:

> Interesting to hear & watch the Sync mode zero in on AM stations as they
> 'pass it around'  !!
>
> Anybody else hearing a clicking noise while turning the SHIFT or WIDTH
> controls?
>
> 73, Bill   N2BC     (K3/00929)
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> 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:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

[KK7P]

> Yes, I've noticed that also. But, I've always had some clicks when
> adjusting filter widths and shifting...

When a moderately strong signal is in the passband and you make a step
change, there is a click.  AM signals are usually pretty strong, so the
clicks are more pronounced.

73,

Lyle KK7P

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

[Joe Subich, W4TV-4]

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: [hidden email]
> [mailto:[hidden email]] On Behalf Of drewko
> Sent: Thursday, November 12, 2009 8:37 AM
> To: [hidden email]
> 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:[hidden email]
>
> 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:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

[Jack Smith-6]

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: [hidden email]
>> [mailto:[hidden email]] On Behalf Of drewko
>> Sent: Thursday, November 12, 2009 8:37 AM
>> To: [hidden email]
>> 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:[hidden email]
>>
>> 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:[hidden email]
>
> 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:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

[Ken Kopp-3]

The last I knew -all- voice announcements ... with the
exception those for the normal time are via dial-up
telephone circuits and usually reflect this.  It's usually
worse on WWVH, perhaps due to the satellite path
between Boulder and Hawaii.

There was / is a +/- 50 mHz circuit between the TX
site north of Ft. Collins and the NBS labs in Boulder,
and they well may go via this circuit.  This path may
be via microwave now.

73! Ken Kopp - K0PP
     [hidden email]

     
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

[n7ws]

What's the bandwidth of that 50 mHz circuit?

--- On Thu, 11/12/09, Ken Kopp <[hidden email]> wrote:

From: Ken Kopp <[hidden email]>
Subject: [Elecraft] OT: WWV / WWVH poor quality voice announcemnts
To: [hidden email]
Date: Thursday, November 12, 2009, 11:22 AM

The last I knew -all- voice announcements ... with the
exception those for the normal time are via dial-up
telephone circuits and usually reflect this.  It's usually
worse on WWVH, perhaps due to the satellite path
between Boulder and Hawaii.

There was / is a +/- 50 mHz circuit between the TX
site north of Ft. Collins and the NBS labs in Boulder,
and they well may go via this circuit.  This path may
be via microwave now.

73! Ken Kopp - K0PP
     [hidden email]

     
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

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:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

[Joe Subich, W4TV-4]

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:[hidden email]]
> Sent: Thursday, November 12, 2009 1:05 PM
> To: [hidden email]
> Cc: 'drewko'; [hidden email]
> 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: [hidden email]
> >> [mailto:[hidden email]] On Behalf Of drewko
> >> Sent: Thursday, November 12, 2009 8:37 AM
> >> To: [hidden email]
> >> 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:[hidden email]
> >>
> >> 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:[hidden email]
> >
> > 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:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

[ab2tc]

Hi,

The weather announcements on WWV have terrible audio quality, period. Has nothing to do with the K3, nor the new SAM detector. I find SAM to work great (except the locking range is extremely small) unless I engage the "tracking" feature. When engaged,  the display frequency starts hunting and there is a definite wavering in the audio. Some work still needed, it appears.

AB2TC - KNut

Wes Stewart wrote

What's the bandwidth of that 50 mHz circuit?

--- On Thu, 11/12/09, Ken Kopp <[e-mail]> wrote:

From: Ken Kopp <[e-mail]>
Subject: [Elecraft] OT: WWV / WWVH poor quality voice announcemnts
To: [e-mail]
Date: Thursday, November 12, 2009, 11:22 AM

The last I knew -all- voice announcements ... with the
exception those for the normal time are via dial-up

[Joe Subich, W4TV-4]

After more listening tonight (this is WWV on 10 MHz), the problem
papers to be an unacceptable level of FM!  At times WWV is as easy
to copy using the K3's FM detector as it is with either of the AM  
detectors.

73,

   ... Joe, W4TV
 

> -----Original Message-----
> From: Jack Smith [mailto:[hidden email]]
> Sent: Thursday, November 12, 2009 1:05 PM
> To: [hidden email]
> Cc: 'drewko'; [hidden email]
> 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: [hidden email]
> >> [mailto:[hidden email]] On Behalf Of drewko
> >> Sent: Thursday, November 12, 2009 8:37 AM
> >> To: [hidden email]
> >> 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:[hidden email]
> >>
> >> 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:[hidden email]
> >
> > 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:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

[Steve Ellington]

I'm enjoying listening to an AM roundtable on 3885 tonight. With syncAM I
don't miss a single word! I leave the CWT on and the K3 automatically
corrects frequency as each OP takes his turn. Thanks Elecraft!
Can you explain the blinking S? I assume it blinks until the PLL locks with
the carrier. I see it go off/on at times. Maybe the station is drifting or
there's QRN? What should we be looking for?
Steve
N4LQ
[hidden email]
----- Original Message -----
From: "Joe Subich, W4TV" <[hidden email]>
To: "'Jack Smith'" <[hidden email]>
Cc: <[hidden email]>
Sent: Thursday, November 12, 2009 8:25 PM
Subject: Re: [Elecraft] [Elecraft_K3] K3 Beta FirmwareRev. 3.57: Synchronous
AM Detection (AM-S); misc. improvements

>
> After more listening tonight (this is WWV on 10 MHz), the problem
> papers to be an unacceptable level of FM!  At times WWV is as easy
> to copy using the K3's FM detector as it is with either of the AM
> detectors.
>
> 73,
>
>   ... Joe, W4TV
>
>
>
>
>
>> -----Original Message-----
>> From: Jack Smith [mailto:[hidden email]]
>> Sent: Thursday, November 12, 2009 1:05 PM
>> To: [hidden email]
>> Cc: 'drewko'; [hidden email]
>> 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: [hidden email]
>> >> [mailto:[hidden email]] On Behalf Of drewko
>> >> Sent: Thursday, November 12, 2009 8:37 AM
>> >> To: [hidden email]
>> >> 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:[hidden email]
>> >>
>> >> 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:[hidden email]
>> >
>> > 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:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html

--------------------------------------------------------------------------------



No virus found in this incoming message.
Checked by AVG - www.avg.com
Version: 9.0.707 / Virus Database: 270.14.62/2499 - Release Date: 11/12/09
09:33:00

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

[KK7P]

> Can you explain the blinking S? I assume it blinks until the PLL locks with
> the carrier. I see it go off/on at times. Maybe the station is drifting or
> there's QRN? What should we be looking for?

While the signal may sound fine, and the carrier is "60 over S9", the -S
may still flash from time to time, or even mostly flash.

The -S is not a PLL lock indicator, but a quality indicator that is a
combination of near-zero-beat tuning and steady signal quality for a
significant fraction of a second.  When it is flashing, the synchronous
AM detector is *probably* in a hold-and-wait mode, and when it is steady
the detector is *probably* locked or locking.

This will be improved over time.

Meanwhile, think of synchronous AM as a tool in your receiver's toolbox
for AM listening. Sometimes the envelope detector is best.  Sometimes
synchronous AM is better.  Sometimes, just carefully tuning with regular
SSB is better.  One size doesn't fit all :-)

7,

Lyle KK7P

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

[wayne burdick]

K3 beta-test firmware revision 3.59 (with DSP rev. 2.46) is now  
available. See release notes below.

Rev. 3.59 does _not_ include any changes to DVR message playback and  
cancel. These are still in the works and will be made available in  
time for the phone contest this weekend.

Please send any questions to [hidden email]. For instructions  
on how to load beta firmware, see:

      http://www.elecraft.com/K3/k3_software.htm

73,
Wayne
N6KR

* * *

MCU 3.59 / DSP 2.46, 11-18-2009

* FSK-D WAS CHANGING TO AFSK-A ON A/B or REV: Fixed.

* SYNC AM VFO TRACKING ACCURACY IMPROVED (DSP 2.46). The offset
contributed by the synchronous AM detector's PLL should be only
a few Hz, max.

* SWR INDICATOR TONES AFTER ATU TUNE: If switch tones
are enabled, a second tone will be emitted following an ATU TUNE.
This tone provides a rough idea of the SWR that the KAT3 was
able to obtain:

   Lower pitch than 1st tone: Unknown SWR (ant. may be shorted)
   Same pitch as 1st tone: SWR <= 2.0:1
   Medium-high pitch: SWR <= 3.0:1
   High pitch: SWR > 3.0:1.

This feature was added primarily for our blind customers, but it’s
useful whenever you tap ATU TUNE without looking at the final SWR
reading.

Remote Control Command Changes:

* IC COMMAND (ICON status): Now returning correct message
bank in voice modes (byte a, bit 3).


______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

[DaleJ]

Loaded 3.59 just now.  Radio NZ on 9765, locks on with the K3 at  
9764.984, it's dithering a couple of hz. 5-4-5-4-3 etc.

After this load I thought I had a problem.  It ended the download and  
returned the K3 to (what I thought) would be normal operation with a  
loud pop and crackle in the speaker.  The S-meter was pegged out.  I  
shut down the K3 for a few seconds and turned it back on with the same  
results.  So I turned off the K3 and the power supply for a little  
longer then turned it back on, meter still pegged out, after several  
seconds or perhaps a minute the meter slowly came back down and I was  
receiving Radio NZ.  Now everything seems to be ok.  I have not tried  
transmitting yet.

Dale, K9VUJ



On 18, Nov 2009, at 20:41, Wayne Burdick wrote:

> K3 beta-test firmware revision 3.59 (with DSP rev. 2.46) is now
> available. See release notes below.
>
> Rev. 3.59 does _not_ include any changes to DVR message playback and
> cancel. These are still in the works and will be made available in
> time for the phone contest this weekend.
>
> Please send any questions to [hidden email]. For instructions
> on how to load beta firmware, see:
>
>      http://www.elecraft.com/K3/k3_software.htm
>
> 73,
> Wayne
> N6KR
>
> * * *
>
> MCU 3.59 / DSP 2.46, 11-18-2009
>
> * FSK-D WAS CHANGING TO AFSK-A ON A/B or REV: Fixed.
>
> * SYNC AM VFO TRACKING ACCURACY IMPROVED (DSP 2.46). The offset
> contributed by the synchronous AM detector's PLL should be only
> a few Hz, max.
>
> * SWR INDICATOR TONES AFTER ATU TUNE: If switch tones
> are enabled, a second tone will be emitted following an ATU TUNE.
> This tone provides a rough idea of the SWR that the KAT3 was
> able to obtain:
>
>   Lower pitch than 1st tone: Unknown SWR (ant. may be shorted)
>   Same pitch as 1st tone: SWR <= 2.0:1
>   Medium-high pitch: SWR <= 3.0:1
>   High pitch: SWR > 3.0:1.
>
> This feature was added primarily for our blind customers, but it’s
> useful whenever you tap ATU TUNE without looking at the final SWR
> reading.
>
> Remote Control Command Changes:
>
> * IC COMMAND (ICON status): Now returning correct message
> bank in voice modes (byte a, bit 3).
>
>
>
>
> ------------------------------------
>
> Yahoo! Groups Links
>
> <*> To visit your group on the web, go to:
>    http://groups.yahoo.com/group/Elecraft_K3/
>
> <*> Your email settings:
>    Individual Email | Traditional
>
> <*> To change settings online go to:
>    http://groups.yahoo.com/group/Elecraft_K3/join
>    (Yahoo! ID required)
>
> <*> To change settings via email:
>    [hidden email]
>    [hidden email]
>
> <*> To unsubscribe from this group, send an email to:
>    [hidden email]
>
> <*> Your use of Yahoo! Groups is subject to:
>    http://docs.yahoo.com/info/terms/
>

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html