Date   

Re: K3s USB failure

Henk PA0C
 

This could be caused by the fact that the P3 controls the USB baudrate.(RS232 is looped via the P3 before conversion to USB)
So check if all baudrate settings are still the same.
73 Henk
PA0C

-------- Oorspronkelijk bericht --------
Van: "Mark W2OR via groups.io" <reston2010mm-orders@...>
Datum: 24-03-2021 21:49 (GMT+01:00)
Aan: Elecraft-K3@groups.io
Onderwerp: Re: [Elecraft-K3] K3s USB failure

This is a Reply to the Original Post : 
Original Post from Dale:  <<My USB port on the K3s has apparently failed.  No communication between the computer and the K3s using the utility.  I changed the USB cable still dead.   I switched to the RS232 using a USB to RS232 adapter and everything works again.  I emailed Elecraft support several days ago but so far not heard anything back.  Any thoughts or ideas what might be the problem? Tnx  Dale, K9VUJ >>

Dale and Others:  When my brand new KIO3B (installed at Elecraft) failed here, including failure of CAT and ability to use K3-Utility, it was discovered that disconnecting the cable from the K3 to the P3 Panadaptor brought the KIO3B CAT and K3-Utility back.  A temporary fix.  Try that at your end, and see what happens and let us know here.  The KIO3B here still needs repair/replacement, yes, and so the above is a temp work-around, if that works for you. Good luck.  //Mark w2or 


Re: Diversity Reception

Lou W7HV
 

Related is what is referred to as "Perversity Reception".  This is listening to the same transmission on two different bands.  This works, for example,  with W1AW bulletins and code practice.  In my case I'm using a SDR (Software Defiled Radio).  

On Wednesday, March 24, 2021, 12:47:00 PM MDT, Jim Brown <k9yc@...> wrote:


On 3/24/2021 11:04 AM, Bob Evans wrote:
> You might be surprised how close to true diversity reception the
> binaural AFX setting sounds.

While AFX may simulate the SOUND of Diversity reception, it is NOT even
close to doing what diversity reception does -- two antennas that are
physically separate from each other, each fed to their own RX,
frequencies of the two receivers synced.

Diversity does at least these very important things:

1) it compensates for selective fading -- slow fading on the AM band,
160M, and 80M, and "picket fencing at VHF and UHF. Selective fading is
the result of the addition or cancellation of wavefronts that have taken
different paths, and thus arrive at different times, so they slide in
and out of phase with each other over time. It works because the
antennas are physically separated by a significant fraction of a
wavelength, so that when the wavefronts are cancelling most deeply at
one antenna they may be cancelling less or even adding at the other.

2) it allows our ears to combine signals from antennas that favor
different vertical directivity or different polarization.

73, Jim K9YC








Re: K3s USB failure

Mark W2OR
 

This is a Reply to the Original Post : 
Original Post from Dale:  <<My USB port on the K3s has apparently failed.  No communication between the computer and the K3s using the utility.  I changed the USB cable still dead.   I switched to the RS232 using a USB to RS232 adapter and everything works again.  I emailed Elecraft support several days ago but so far not heard anything back.  Any thoughts or ideas what might be the problem? Tnx  Dale, K9VUJ >>

Dale and Others:  When my brand new KIO3B (installed at Elecraft) failed here, including failure of CAT and ability to use K3-Utility, it was discovered that disconnecting the cable from the K3 to the P3 Panadaptor brought the KIO3B CAT and K3-Utility back.  A temporary fix.  Try that at your end, and see what happens and let us know here.  The KIO3B here still needs repair/replacement, yes, and so the above is a temp work-around, if that works for you. Good luck.  //Mark w2or 


Diversity Reception

Jim Brown
 

On 3/24/2021 11:04 AM, Bob Evans wrote:
You might be surprised how close to true diversity reception the binaural AFX setting sounds.
While AFX may simulate the SOUND of Diversity reception, it is NOT even close to doing what diversity reception does -- two antennas that are physically separate from each other, each fed to their own RX, frequencies of the two receivers synced.

Diversity does at least these very important things:

1) it compensates for selective fading -- slow fading on the AM band, 160M, and 80M, and "picket fencing at VHF and UHF. Selective fading is the result of the addition or cancellation of wavefronts that have taken different paths, and thus arrive at different times, so they slide in and out of phase with each other over time. It works because the antennas are physically separated by a significant fraction of a wavelength, so that when the wavefronts are cancelling most deeply at one antenna they may be cancelling less or even adding at the other.

2) it allows our ears to combine signals from antennas that favor different vertical directivity or different polarization.

73, Jim K9YC


Re: Audio range

Bob Evans
 

Alan,

Why are you not using BOTH of the K3S' channels through the DSP or both K3S channels and no DSP box...just the K3S' internal 8 band equalizer?  Apparently, you are shooting for diversity reception while using speakers?  You might be surprised how close to true diversity reception the binaural AFX setting sounds.  The K3S' internal DSP NR has a wide range of settings you might like too.  It just seems like the BHI DSP unit is a step down in audio flexibility (only 2 bands) from what's built into the K3S.  Also, if signals are so marginal that diversity is required, wouldn't headphones be a better choice anyway?

Just curious.  Maybe you're looking for a reason to build a speaker cross-over and that's plenty of justification for this experiment.  ;-)

GL es 73,
Bob K5WA


Re: K3/0-mini Schematic

Dan K4FN
 
Edited

Thanks to all.  That’s what I was looking for.

AUX/MIC RJ45
2 mic ground
3 ground
5 mic input
6 ptt input

Dan  K4FN


Re: Why is my K3 off frequency?

Michael Foerster
 

You can easily check your radio for drift, if you have WSJT-X installed.  Start your radio up cold on WSJT-X and select the "FreqCal" mode, using 10 or 15 MHz.  Let it run for a few hours and when done, click the "Monitor" button to stop the recording.   You can see how much it has drifted by looking at the output. 

You can graph the data in a spreadsheet program (Excel, Google Sheets, etc.)  by copying the data in the window and paste it into an editor (Notepad?).  Replace all the spaces in the file with commas (,) and then replace all two sets of commas (,,) with a single comma (,) doing this a number of times!  Save as a .CSV file and open that with a spreadsheet program and graph the time and DF columns.

Mike


Re: K3/0-mini Schematic

Colin Smithers
 

Look here:

 

https://ftp.elecraft.com/K3-Remote/Manuals%20Downloads/K3%20Remote%20Owner's%20Manual%20%20Rev%20D.pdf

 

Also look at the remoterig manuals which include a lot of interface info to the K3, K3S, K3 remote and many other rigs.

 

73, Colin G4CWH

 

From: Elecraft-K3@groups.io [mailto:Elecraft-K3@groups.io] On Behalf Of Dan K4FN via groups.io
Sent: 23 March 2021 23:23
To: Elecraft-K3@groups.io
Subject: Re: [Elecraft-K3] K3/0-mini Schematic

 

No luck finding a schematic!  Does anyone have the pinout for the 15 pin rear connector?

Dan  K4FN


Re: K3/0-mini Schematic

Henk PA0C
 

Sorry, it was still early, I made a mistake.

The correct order is:

 

2 mic ground

3 ground

5 mic input

6 ptt input

 

73 Henk

PA0C

 

 

Van: Elecraft-K3@groups.io <Elecraft-K3@groups.io> Namens Henk PA0C via groups.io
Verzonden: woensdag 24 maart 2021 09:50
Aan: Elecraft-K3@groups.io
Onderwerp: Re: [Elecraft-K3] K3/0-mini Schematic

 

Hi Dan,

 

I figured out part of the connector, only what I needed.

 

With the AUX/RJ45 connector towards you:

At the 9 pin “IC-connector”, the row towards the middle of the pcb, counting from left to right

 

2 mic ground

3 ground

4 mic input

5 ptt input

 

Hope this helps a bit

 

73 Henk

PA0C

 

 

 

Van: Elecraft-K3@groups.io <Elecraft-K3@groups.io> Namens Dan K4FN
Verzonden: woensdag 24 maart 2021 00:59
Aan: Elecraft-K3@groups.io
Onderwerp: Re: [Elecraft-K3] K3/0-mini Schematic

 

[Edited Message Follows]

Mark,
That works for all except the AUX/MIC RJ45 connector which depends on the jumper settings in the RRC.  I having trouble tracing them back.
Dan  K4FN


Re: K3/0-mini Schematic

Henk PA0C
 

Hi Dan,

 

I figured out part of the connector, only what I needed.

 

With the AUX/RJ45 connector towards you:

At the 9 pin “IC-connector”, the row towards the middle of the pcb, counting from left to right

 

2 mic ground

3 ground

4 mic input

5 ptt input

 

Hope this helps a bit

 

73 Henk

PA0C

 

 

 

Van: Elecraft-K3@groups.io <Elecraft-K3@groups.io> Namens Dan K4FN
Verzonden: woensdag 24 maart 2021 00:59
Aan: Elecraft-K3@groups.io
Onderwerp: Re: [Elecraft-K3] K3/0-mini Schematic

 

[Edited Message Follows]

Mark,
That works for all except the AUX/MIC RJ45 connector which depends on the jumper settings in the RRC.  I having trouble tracing them back.
Dan  K4FN


Re: Why is my K3 off frequency?

Wes Stewart
 

If you say so.  It's announced in QST and the results go to fmt.arrl.org and since there are some fldigi guys running their own FMTs I called it "ARRL" to differentiate the two.  QST called it the A.R.R.L. Frequency Measuring Test in September 1931, but maybe I haven't kept up.

Maybe your K3 is that good but neither of mine is.  The K3S(F) with the TCXO is disappointing, so I use other means.  My new TS-890 even without feeding in an external reference is very good.  But lightning season began with a bang this afternoon, so it all might be moot.

Wes  N7WS


On Tue, Mar 23, 2021 at 09:41 PM, Robert W5AJ wrote:
Not ARRL FMT
Note the ARRL is careful in qst to not call it ARRL.  (Sometimes a newbie at qst forgets in past issue.....)  FMT is done by outside group, ARRL long ago said it does not have equipment for such.
K3 can easily be within one HZ for FMT, warm it up and give FMT a try.
 
12hz? Eh?  N2SO , what's the update?  Please
 
 


On Tue, Mar 23, 2021, 4:59 PM Wes Stewart via groups.io <n7ws=yahoo.com@groups.io> wrote:
Me too.  I only worry about it during ARRL Frequency Measurement Tests.  There, except for a brain freeze last time where I added instead of subtracted on one QRMed frequency, I'm usually within a few milli-Hertz.

Wes  N7WS


On Tue, Mar 23, 2021 at 01:38 PM, Jim Brown wrote:
I've been hamming for almost 65 years, and the only times I've concerned about precision of frequency is when I'm near a band edge.

 

 


Re: Why is my K3 off frequency?

Robert W5AJ
 

Not ARRL FMT
Note the ARRL is careful in qst to not call it ARRL.  (Sometimes a newbie at qst forgets in past issue.....)  FMT is done by outside group, ARRL long ago said it does not have equipment for such.
K3 can easily be within one HZ for FMT, warm it up and give FMT a try.

12hz? Eh?  N2SO , what's the update?  Please




On Tue, Mar 23, 2021, 4:59 PM Wes Stewart via groups.io <n7ws=yahoo.com@groups.io> wrote:
Me too.  I only worry about it during ARRL Frequency Measurement Tests.  There, except for a brain freeze last time where I added instead of subtracted on one QRMed frequency, I'm usually within a few milli-Hertz.

Wes  N7WS


On Tue, Mar 23, 2021 at 01:38 PM, Jim Brown wrote:
I've been hamming for almost 65 years, and the only times I've concerned about precision of frequency is when I'm near a band edge.


Re: Why is my K3 off frequency?

Dave (NK7Z)
 

Actually that is not the case for all digits!. There is some inconsistency in how the K3 changes the last digit...

In some cases there are no changes to the last digit, and in others there are changes made to the last digit.

73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources

On 3/23/21 11:05 AM, Drew Vonada-Smith K3PA wrote:
Yes, the display is merely rounding to the displayed digit.  Nothing more complicated.


Re: K3/0-mini Schematic

Dan K4FN
 
Edited

Mark,
That works for all except the AUX/MIC RJ45 connector which depends on the jumper settings in the RRC.  I having trouble tracing them back.
Dan  K4FN


Re: K3/0-mini Schematic

Mark Morin
 

"Does anyone have the pinout for the 15 pin rear connector?"

Dan, I pieced the K3/0 Mini pin-out together pretty well using the cable wiring diagram on the last page of the Elecraft K3 remote manual (K3/0-mini to Remote-Rig Interface Cable). That diagram doesn't define what the pin functions are, but it shows where they connect on the RRC. Then I just used the remote-rig RRC-1258 manual (www.remoterig.com)  to see what each of the pins does. Worked for me.

Mark VA2MM


Re: K3/0-mini Schematic

Dan K4FN
 

No luck finding a schematic!  Does anyone have the pinout for the 15 pin rear connector?

Dan  K4FN


Re: Why is my K3 off frequency?

Wes Stewart
 

Me too.  I only worry about it during ARRL Frequency Measurement Tests.  There, except for a brain freeze last time where I added instead of subtracted on one QRMed frequency, I'm usually within a few milli-Hertz.

Wes  N7WS


On Tue, Mar 23, 2021 at 01:38 PM, Jim Brown wrote:
I've been hamming for almost 65 years, and the only times I've concerned about precision of frequency is when I'm near a band edge.


Re: Why is my K3 off frequency?

Jim Brown
 

On 3/23/2021 1:23 PM, Steve wrote:
You are correct.  With the manipulation of fine/coarse you can get your display to conceal your true frequency.   It can be deceptive.
Not quite -- it simply sets the tuning steps when you spin the knob.

And the guy who complained about someone being 12 Hz off frequency was, to be kind, "misguided."

I've been hamming for almost 65 years, and the only times I've concerned about precision of frequency is when I'm near a band edge.

73, Jim K9YC


Re: Why is my K3 off frequency?

Steve
 

You are correct.  With the manipulation of fine/coarse you can get your display to conceal your true frequency.   It can be deceptive.


Re: Why is my K3 off frequency?

Bob McGraw - K4TAX
 

I routinely perform a frequency calibration on my K3S.  The procedure is outlined in the manual, pages 52 & 53.  There is also a somewhat different procedure which I use, employing the CWT and SPOT functions.  Always use the highest reference frequency you can receive such as 15 MHz WWV.

As to being 12 Hz too high, could this be the way you tuned in the net by ear or did you actually set the VFO to display 50.135?   In the FINE mode you can set the frequency to 50.135.000.   Now there is nothing to say this is absolutely correct as indicated by the display.  Correctness depends on the calibration and adjustment of the REF CAL as found in the CONFIG Menu. 

73

Bob, K4TAX



On 3/23/2021 5:20 AM, Charles N2SO wrote:
Hi,
Last night my local ham club scheduled their first ever 6Meter Net and Roundtable for 50.135Mz. I operate USB very rarely, preferring CW for all of my Contesting and DX work. Last night the net control station advised me that I was 12Hz too high and that he had to use his RIT control to tune to me. When I turned on my XIT and transmitted down 12Hz I was right on his frequency. This was confirmed by other callers as well. I have also heard this problem mentioned in the past when checking into occasional 75M nets. Is there an adjustment that I can or should make aside from using my XIT? 
 
Thanks for any assistance you can provide.

73, Charles N2SO

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