Re: [Elecraft] KX2 added to Sherwood's list

[Dave AD6A]

Excellent! What great customer service and support - second to none!!

73, Dave AD6A

Sent from my  iPhone 7 Plus

On Aug 1, 2017, at 6:29 PM, K9MA  wrote:

Another interesting detail, I think.  For the KX3, if I recall correctly, both 
the QST review and Sherwood's tests indicated that the audio image (opposite 
side of zero beat) wasn't all that far down, like 60 dB, and limited close-in 
dynamic range.  I don't recall any such qualifications for the KX2, and indeed 
mine doesn't seem to have an audible image even on the strongest signals.  (Not 
a scientific test, I know, but I think I'd hear an image 60 dB down.) If this 
is so, what is the difference responsible?

Note that the optional "roofing" filter in the KX3 is really just an audio 
filter.  While it may improve dynamic range beyond a few kHz, it has no effect 
on the image.

73,

Scott  K9MA


-- 
Scott  K9MA

k...@sdellington.us

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[Elecraft] OT -- For sale, KAT500 Auto Tuner

[Phil Hystad]

Selling KAT500 Auto-tuner, serial number 2277, that I purchased in March 
(2017).  A bargain at $500 including shipping CONUS.  Paypal requested.  
Excellent condition, hardly used and never more than 100-watts power.

If interested please send message directly to my e-mail address.

73, phil, K7PEH

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Re: [Elecraft] [K3] Using K3 for relative noise survey

[Hisashi T Fujinaka]

Just a warning: my buddy did a survey of his property (which did end up
being a contesting site) and heard nothing. Turns out the high-tension
lines about 1000' away were turned off for maintenance at the time.

On Tue, 1 Aug 2017, Dave Cole wrote:


Amen to that!  Day and night are as different as-- well-- day and night!


--
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BSEE + BSChem + BAEnglish + MSCS + $2.50 = coffee
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Re: [Elecraft] KX2 added to Sherwood's list

[Wayne Burdick]

We found the problem; turns out to be in the setup command to the DSP, not in 
the DSP itself. With any luck we'll have it fixed this week in both rigs. 

Wayne
N6KR


http://www.elecraft.com

> On Aug 1, 2017, at 6:29 PM, K9MA  wrote:
> 
> Another interesting detail, I think.  For the KX3, if I recall correctly, 
> both the QST review and Sherwood's tests indicated that the audio image 
> (opposite side of zero beat) wasn't all that far down, like 60 dB, and 
> limited close-in dynamic range.  I don't recall any such qualifications for 
> the KX2, and indeed mine doesn't seem to have an audible image even on the 
> strongest signals.  (Not a scientific test, I know, but I think I'd hear an 
> image 60 dB down.) If this is so, what is the difference responsible?
> 
> Note that the optional "roofing" filter in the KX3 is really just an audio 
> filter.  While it may improve dynamic range beyond a few kHz, it has no 
> effect on the image.
> 
> 73,
> 
> Scott  K9MA
> 
> 
> -- 
> Scott  K9MA
> 
> k...@sdellington.us
> 
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Re: [Elecraft] [OT] Maintaining Sanity with Filters

[Dave Cole]

Your tolerance level for off topic posts is different than many.

73s and thanks,
Dave
NK7Z
http://www.nk7z.net

On 08/01/2017 05:47 PM, Wes Stewart wrote:
I run my email clients wide open like a direct sampling radio and 
post-process by eyeball and the [delete] key.  I really don't understand 
all the fuss.


Wes  N7WS

On 8/1/2017 4:00 PM, Jim Cassidy wrote:

Is there an email roofing filter recommendation??



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Re: [Elecraft] [K3] Using K3 for relative noise survey

[Dave Cole]

Amen to that!  Day and night are as different as-- well-- day and night!

73s and thanks,
Dave
NK7Z
http://www.nk7z.net

On 08/01/2017 05:09 PM, Mel Farrer via Elecraft wrote:

Rick,
While it is not easy, you should put in the agenda checking it day and night.  
I found very different noise profiles that way
Mel, K6KBE

   From: Rick Miller - N1RM 
  To: elecraft@mailman.qth.net
  Sent: Tuesday, August 1, 2017 3:54 PM
  Subject: Re: [Elecraft] [K3] Using K3 for relative noise survey

Thanks for all the info!


It turns out I have an RSP2 and now have it running with HDSDR in "slow"
waterfall mode.  I'm now looking for a way to control the front end options
of the RSP2 - nothing seems to be built into HDSDR to do that, but that's a
topic for another mail list.  BTW - I conveniently have an EXCELLENT Clifton
Labs 1800 KHz AMBC high pass filter that sure tames the input dynamic range
when measuring 160M.

I will also try the suggestions for different ways to record signal strength
on the K3.

Thanks again,
Rick
N1RM



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Re: [Elecraft] [OT] Maintaining Sanity with Filters

[Dave Cole]

Thanks for sharing, I think I will add some filters along those lines as 
well.  My filters are rather simple now, but I see I will need to make 
them more complex to avoid all the off topic posts.  Thanks for sharing!


73s and thanks,
Dave
NK7Z
http://www.nk7z.net

On 08/01/2017 02:52 PM, Kevin Stover, AC0H wrote:

I have a filter setup for OT posts.

If the sender of the email puts OT or [OT] in the subject line a 
required by the Elecraft guidelines my mail program will automatically 
move that email to an "OT" folder which I peruse at my convenience.


All of my filters run on any new mail and move the mail to the 
respective folder. Any email that doesn't get moved ends up in a generic 
"Elecraft" folder with two strikes applied. If the mail wasn't sent by 
Eric or Wayne they're gone. Strike three.


It all gets sorted and moved automatically. I don't have to touch it and 
don't ever see the emails the filters have deleted unless I check the 
trash before cleaning that out. It's usually right click and "empty 
folder".



On 7/31/2017 7:16 PM, Dave Cole wrote:
What if I make a post with the same title as the one above, and don't 
mention any Elecraft model numbers in either the body or subject...


How do you make the decision to filter or delete then?  I ask not to 
be contentious, but to learn how for my own filters.  I don't want to 
have to set filters in real time for every OT post, but a general 
filter would be great.


73s and thanks,
Dave
NK7Z
http://www.nk7z.net

On 07/31/2017 04:47 PM, Kevin Stover, AC0H wrote:

It's simple.

I set my filters up to Elecraft mail list guidelines.
Any mail those filters don't move to the correct local folder, K2, 
K3, KX3, etc..., are unceremoniously dumped.


You could post the cure for cancer and if you can't follow the 
"rules" as set up by Elecraft my mail reader will auto-dump your 
scofflaw email.


It works.



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Re: [Elecraft] KX2 added to Sherwood's list

[K9MA]

Another interesting detail, I think.  For the KX3, if I recall 
correctly, both the QST review and Sherwood's tests indicated that the 
audio image (opposite side of zero beat) wasn't all that far down, like 
60 dB, and limited close-in dynamic range.  I don't recall any such 
qualifications for the KX2, and indeed mine doesn't seem to have an 
audible image even on the strongest signals.  (Not a scientific test, I 
know, but I think I'd hear an image 60 dB down.) If this is so, what is 
the difference responsible?


Note that the optional "roofing" filter in the KX3 is really just an 
audio filter.  While it may improve dynamic range beyond a few kHz, it 
has no effect on the image.


73,

Scott  K9MA


--
Scott  K9MA

k...@sdellington.us

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Re: [Elecraft] [OT] Maintaining Sanity with Filters

[Wes Stewart]

I run my email clients wide open like a direct sampling radio and post-process 
by eyeball and the [delete] key.  I really don't understand all the fuss.


Wes  N7WS

On 8/1/2017 4:00 PM, Jim Cassidy wrote:

Is there an email roofing filter recommendation??



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Re: [Elecraft] [OT] Maintaining Sanity with Filters

[Lynn W. Taylor, WB6UUT]

PopFile, although it's more like a really good DSP.

On 8/1/2017 4:00 PM, Jim Cassidy wrote:

Is there an email roofing filter recommendation??

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Re: [Elecraft] [K3] Using K3 for relative noise survey

[Mel Farrer via Elecraft]

Rick, 
While it is not easy, you should put in the agenda checking it day and night.  
I found very different noise profiles that way
Mel, K6KBE

  From: Rick Miller - N1RM 
 To: elecraft@mailman.qth.net 
 Sent: Tuesday, August 1, 2017 3:54 PM
 Subject: Re: [Elecraft] [K3] Using K3 for relative noise survey
   
Thanks for all the info!

It turns out I have an RSP2 and now have it running with HDSDR in "slow"
waterfall mode.  I'm now looking for a way to control the front end options
of the RSP2 - nothing seems to be built into HDSDR to do that, but that's a
topic for another mail list.  BTW - I conveniently have an EXCELLENT Clifton
Labs 1800 KHz AMBC high pass filter that sure tames the input dynamic range
when measuring 160M.

I will also try the suggestions for different ways to record signal strength
on the K3.

Thanks again,
Rick
N1RM



--
View this message in context: 
http://elecraft.365791.n2.nabble.com/K3-Using-K3-for-relative-noise-survey-tp7632955p7632979.html
Sent from the Elecraft mailing list archive at Nabble.com.
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[Elecraft] KXPA for sale sold

[David Gow]

It is sold pending recipient of funds

Dave
W7VM
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Re: [Elecraft] [OT] Maintaining Sanity with Filters

[Jim Cassidy]

Is there an email roofing filter recommendation??

- Original Message -
From: "Nr4c" 
To: "Kevin Stover, AC0H" 
Cc: elecraft@mailman.qth.net
Sent: Tuesday, August 1, 2017 3:37:05 PM
Subject: Re: [Elecraft] [OT] Maintaining Sanity with Filters

Interesting subject. I don't seem to have trouble with the "filters" in my K3S. 
So I just deleted this thread. Now I see it is about "email filters". Duh, who 
knew?

A more descriptive subject might have drawn me in. This is something I might be 
interested in



Sent from my iPhone
...nr4c. bill


> On Aug 1, 2017, at 5:52 PM, Kevin Stover, AC0H  wrote:
> 
> I have a filter setup for OT posts.
> 
> If the sender of the email puts OT or [OT] in the subject line a required by 
> the Elecraft guidelines my mail program will automatically move that email to 
> an "OT" folder which I peruse at my convenience.
> 
> All of my filters run on any new mail and move the mail to the respective 
> folder. Any email that doesn't get moved ends up in a generic "Elecraft" 
> folder with two strikes applied. If the mail wasn't sent by Eric or Wayne 
> they're gone. Strike three.
> 
> It all gets sorted and moved automatically. I don't have to touch it and 
> don't ever see the emails the filters have deleted unless I check the trash 
> before cleaning that out. It's usually right click and "empty folder".
> 
> 
>> On 7/31/2017 7:16 PM, Dave Cole wrote:
>> What if I make a post with the same title as the one above, and don't 
>> mention any Elecraft model numbers in either the body or subject...
>> How do you make the decision to filter or delete then?  I ask not to be 
>> contentious, but to learn how for my own filters.  I don't want to have to 
>> set filters in real time for every OT post, but a general filter would be 
>> great.
>> 73s and thanks,
>> Dave
>> NK7Z
>> http://www.nk7z.net
>>> On 07/31/2017 04:47 PM, Kevin Stover, AC0H wrote:
>>> It's simple.
>>> 
>>> I set my filters up to Elecraft mail list guidelines.
>>> Any mail those filters don't move to the correct local folder, K2, K3, KX3, 
>>> etc..., are unceremoniously dumped.
>>> 
>>> You could post the cure for cancer and if you can't follow the "rules" as 
>>> set up by Elecraft my mail reader will auto-dump your scofflaw email.
>>> 

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-- 
Jim Cassidy   

KI7Y
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Re: [Elecraft] K3S Kit issue - Does not transmit in SSB

[Gerry Hull]

Just a quick thought... make sure you are not in TX Test mode!

73, Gerry W1VE
On Mon, Jul 31, 2017 at 1:11 PM VE8EM  wrote:

> Good day,
>
> I am adressing this issue to this forum as I am puzzled and don't know what
> to do.
>
> Basically, I assembled my K3S kit about a month ago, no issues with the
> build and initial testing. I have done all of the required calibration and
> even the RF Gain calibration using the XG3 signal generator.
>
> Everything worked out fine, I was able to receive signals and hooking up my
> paddle I was able to transmit in CW. Since I have the TX Monitor option, I
> was able to see the signal and power output on the P3 display.  I did put
> back the radio in his box and put it aside for about a month as I was busy
> with other family issues (i.e. a new baby).
>
> I pulled back the radio last week as I wanted to play with the digital
> modes, after fiddling with the settings I was able to hook up the computer
> and the radio using the USB cable to use the internal sound card and
> control. I am able to receive signals on my computer, I can see the
> received
> signal on the computer display so I have no doubt that the sound card
> drivers are working. I configured the software to control the radio and
> when
> I start to transmit using the software, the radio turn into transmit mode
> and the TX red LED lights up. However, looking on the P3 Display using the
> TX Monitor, I see no signal being transmitted, if I increase the Monitor
> volume, I hear a hissing sound and there is no power output.
>
> Since I initially thought this was caused by a setting, I hooked up the MH2
> microphone and pressed the PTT, the TX LED lights up, but when I speak in
> the microphone, no signal appear on the TX Monitor, same hissing sound when
> I increase the Monitor Volume and no power output.
>
> Does anyone have faced such an issue?   Any idea what is wrong?
>
> I have assembled many kits helping other people (K3, K3S, KX3, PX3) and
> never faced any issue but for my kit, I dont get it.
>
> Thanks in advance!
>
> Etienne Marcoux
> VE8EM
>
>
>
>
> --
> View this message in context:
> http://elecraft.365791.n2.nabble.com/K3S-Kit-issue-Does-not-transmit-in-SSB-tp7632922.html
> Sent from the Elecraft mailing list archive at Nabble.com.
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>
-- 
Gerry Hull, W1VE  Hancock, NH USA
Member: ARRL, YCCC, YCCCN, CW Ops
ge...@w1ve.com ph: 1-617-CW-SPARK (find me)
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Re: [Elecraft] K3S Kit issue - Does not transmit in SSB

[Steve Lund]

This is a really common problem with Win10. If it has downloaded a new
update in the background, but not installed it, many of the drivers quit
working. For me it is ALWAYS soundcard #1 that fails. Once a reboot is
performed, things start working normally.

Steve, K6UM

On Tue, Aug 1, 2017 at 9:36 AM, rich hurd WC3T  wrote:

> I have had the same thing happen to me numerous times, albeit not with
> radio control software.   The machine will just lose its freaking mind and
> when I shut it down, it'll begin installing downloaded (uninstalled)
> updates.  I call it the computer's "throwing a temper tantrum."
>
> On Tue, Aug 1, 2017 at 10:54 VE8EM  wrote:
>
> > Finally,  I was about to give up but I managed to solve the issue.
> >
> > After hours of configuration checking and trials, I installed some
> Windows
> > update which prompted a restart.
> >
> > After restarting the computer, and being quite stubborn, I decided to
> give
> > it another try...  And it magically worked, no changes needed in the
> > settings, just a computer restart and the driver settled I guess and it
> has
> > worked since then...
> >
> > Hopefully it will stay that way!
> >
> >
> >
> > --
> > View this message in context:
> > http://elecraft.365791.n2.nabble.com/K3S-Kit-issue-Does-
> not-transmit-in-SSB-tp7632922p7632957.html
> > Sent from the Elecraft mailing list archive at Nabble.com.
> > __
> > Elecraft mailing list
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> > Message delivered to r...@wc3t.us
> >
> --
> 73 (or 72 for the QRP folks),
> Rich Hurd / WC3T
> DMR ID: 3142737
> Northampton County RACES
> EPA-ARRL Public Information Officer for Scouting
> Latitude: 40.761621 Longitude: -75.288988  (40°45.68' N 75°17.33' W) Grid:
> *FN20is*
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Re: [Elecraft] [K3] Using K3 for relative noise survey

[Rick Miller - N1RM]

Thanks for all the info!

It turns out I have an RSP2 and now have it running with HDSDR in "slow"
waterfall mode.  I'm now looking for a way to control the front end options
of the RSP2 - nothing seems to be built into HDSDR to do that, but that's a
topic for another mail list.  BTW - I conveniently have an EXCELLENT Clifton
Labs 1800 KHz AMBC high pass filter that sure tames the input dynamic range
when measuring 160M.

I will also try the suggestions for different ways to record signal strength
on the K3.

Thanks again,
Rick
N1RM



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Re: [Elecraft] [OT] Maintaining Sanity with Filters

[Nr4c]

Interesting subject. I don't seem to have trouble with the "filters" in my K3S. 
So I just deleted this thread. Now I see it is about "email filters". Duh, who 
knew?

A more descriptive subject might have drawn me in. This is something I might be 
interested in



Sent from my iPhone
...nr4c. bill


> On Aug 1, 2017, at 5:52 PM, Kevin Stover, AC0H  wrote:
> 
> I have a filter setup for OT posts.
> 
> If the sender of the email puts OT or [OT] in the subject line a required by 
> the Elecraft guidelines my mail program will automatically move that email to 
> an "OT" folder which I peruse at my convenience.
> 
> All of my filters run on any new mail and move the mail to the respective 
> folder. Any email that doesn't get moved ends up in a generic "Elecraft" 
> folder with two strikes applied. If the mail wasn't sent by Eric or Wayne 
> they're gone. Strike three.
> 
> It all gets sorted and moved automatically. I don't have to touch it and 
> don't ever see the emails the filters have deleted unless I check the trash 
> before cleaning that out. It's usually right click and "empty folder".
> 
> 
>> On 7/31/2017 7:16 PM, Dave Cole wrote:
>> What if I make a post with the same title as the one above, and don't 
>> mention any Elecraft model numbers in either the body or subject...
>> How do you make the decision to filter or delete then?  I ask not to be 
>> contentious, but to learn how for my own filters.  I don't want to have to 
>> set filters in real time for every OT post, but a general filter would be 
>> great.
>> 73s and thanks,
>> Dave
>> NK7Z
>> http://www.nk7z.net
>>> On 07/31/2017 04:47 PM, Kevin Stover, AC0H wrote:
>>> It's simple.
>>> 
>>> I set my filters up to Elecraft mail list guidelines.
>>> Any mail those filters don't move to the correct local folder, K2, K3, KX3, 
>>> etc..., are unceremoniously dumped.
>>> 
>>> You could post the cure for cancer and if you can't follow the "rules" as 
>>> set up by Elecraft my mail reader will auto-dump your scofflaw email.
>>> 

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Re: [Elecraft] [OT] Maintaining Sanity with Filters

[Jim Brown]

I read a couple of dozen email reflectors, and have for years. Some have 
almost no traffic, some have a lot. Early on, I set up my email client 
(first PM Mail, now Thunderbird) to sort incoming mail by reflector. 
That simple process makes it very easy to read stuff. If there's stuff I 
don't care about, I simply delete it. For the same reason, I don't use 
Digest modes -- it's too hard to browse and delete.


Over the years, I've learned a lot in unexpected places and and at 
unexpected times. :) If I simply trashed stuff without reading it, I 
would have missed a lot.


73, Jim K9YC

On 8/1/2017 2:52 PM, Kevin Stover, AC0H wrote:
I have a filter setup for OT posts. 



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Re: [Elecraft] [OT] Maintaining Sanity with Filters

[Kevin Stover, AC0H]

I have a filter setup for OT posts.

If the sender of the email puts OT or [OT] in the subject line a 
required by the Elecraft guidelines my mail program will automatically 
move that email to an "OT" folder which I peruse at my convenience.


All of my filters run on any new mail and move the mail to the 
respective folder. Any email that doesn't get moved ends up in a generic 
"Elecraft" folder with two strikes applied. If the mail wasn't sent by 
Eric or Wayne they're gone. Strike three.


It all gets sorted and moved automatically. I don't have to touch it and 
don't ever see the emails the filters have deleted unless I check the 
trash before cleaning that out. It's usually right click and "empty folder".



On 7/31/2017 7:16 PM, Dave Cole wrote:
What if I make a post with the same title as the one above, and don't 
mention any Elecraft model numbers in either the body or subject...


How do you make the decision to filter or delete then?  I ask not to be 
contentious, but to learn how for my own filters.  I don't want to have 
to set filters in real time for every OT post, but a general filter 
would be great.


73s and thanks,
Dave
NK7Z
http://www.nk7z.net

On 07/31/2017 04:47 PM, Kevin Stover, AC0H wrote:

It's simple.

I set my filters up to Elecraft mail list guidelines.
Any mail those filters don't move to the correct local folder, K2, K3, 
KX3, etc..., are unceremoniously dumped.


You could post the cure for cancer and if you can't follow the "rules" 
as set up by Elecraft my mail reader will auto-dump your scofflaw email.


It works.



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--
R. Kevin StoverAC0H
FISTS #11993
SKCC #215
NAQCC #3441
ARRL
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[Elecraft] MAC BOOK KX3 QUESTION

[Brian ve3bwp Pietrzyk]

Gerry I use my KX3 and a couple of macbooks all the time with no problems. The 
elecraft USB to serial cable that comes with the KX3 works fine with Fldidgi or 
wsjt. For the RX/TX audio interfacing I use the Tigertronics Signalink USB 
interface which is opto-isolated just for that extra level of insurance. You 
can order it with preconfigured KX3 cable and jumper. Its a pretty common 
configuration so you’ll find no shortage of help pulling it all together. 

Message: 13
Date: Mon, 31 Jul 2017 20:10:09 GMT
From: "Gerry Miller" >
To: elecraft@mailman.qth.net 
Subject: [Elecraft] MAC BOOK KX3 QUESTION
Message-ID: <20170731.161009.1587...@webmail05.vgs.untd.com 
>
Content-Type: text/plain; charset=windows-1252

HI GUYS,  I AM USING A MAC BOOK PRO FROM 2010.  I HAVE THE LATEST SOFTWARE AS 
OF THIS DATE.  THE QUESTION IS, DOES "BIG E" HAVE A CABLE AVAILABLE THAT WOULD 
ALLOW WORK WITH MY MAC (USB) TO SEND-RECEIVE DATA SOFTWARE I HAVE ON THE PC?
I AM ABLE TO DOWNLOAD KX3 UPDATES, BUT DO NOT KNOW IF I COULD USE THE SAME 
CABLE FOR RTTY/PACKET/JT  SOFTWARE THAT I MAY HAVE ON THE MAC.  THE MAC DOES 
NOT HAVE A CONNECTION FOR A MICROPHONE SUCH AS WOULD BE AVAILABLE ON A WINDOWS 
MACHINE.  I MUST ADMIT THAT I AM NOT COMPUTER LITERATE.TNX AND 73AA2ZJ 
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Re: [Elecraft] KX2 added to Sherwood's list

[Igor Sokolov]

The problem described below also exists in KX3,

That is why I always  adjust bandwidth to 50,150,250, 350 etc Hz.


73, Igor UA9CDC


01.08.2017 16:25, John Reilly пишет:


Here are the odd details on the KX2 filter leakage.  If the filter 
bandwidth is 500, 400, 300, 200 or 100 Hz, filter leakage makes the 
measurement at 2 kHz impossible.  On the other hand, if the filter 
bandwidth is 550, 450, 350, 250, 150 or 50 Hz, then the measurement 
can be made.  The League chose to publish a 2-kHz dynamic range in QST 
even though the measurement cannot be made on the high side with the 
standardized 500-Hz filter bandwidth (or any even bandwidth value). 
Note:  Both the League and I only publish the LOWER of the two 
measurements.  Let’s say the low side dynamic range of some radio is 
95 dB and the high side is 90 dB. Both the League and I publish the 
lower worse-case 90 dB number. In the case of the KX2, I couldn’t pick 
the lower of the two readings since no measurement is possible when 
using the standard 500-Hz filter.


Since the 2-kHz dynamic range value could not be made with the 
standard filter bandwidth at 2 kHz, but could be made at a 3-kHz 
signal spacing, I published that data.  It may be of interest that the 
2-kHz dynamic range number with the non-standard 450-Hz bandwidth was 
only 1 dB worse than the 3-kHz value.  The point of listing the 3-kHz 
value, or any other radio with a non-2 kHz listing is to point out the 
radio has a limitation in its filter performance.


My long form report on the KX2, available in PDF format, goes into 
detail about this issue, and has data on the two radios I tested, 
listed by serial number.


At this point, Elecraft does not know why the KX2 behaves this way, or 
whether there is a possible firmware fix.


Rob Sherwood
NC0B
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Re: [Elecraft] [K3] Using K3 for relative noise survey

[Walter Underwood]

At the FCC website, you can search for registered communications towers within 
a radius of a location.

https://www.fcc.gov/media/radio/asrn-within-radius 


There are 56 registered towers within 10 km of my house.

wunder
K6WRU
Walter Underwood
CM87wj
http://observer.wunderwood.org/ (my blog)

> On Aug 1, 2017, at 10:48 AM, Jim Brown  wrote:
> 
> Thanks Jim.  I live out in the country, at least 30 miles from any high power 
> AM BC, so haven't had this issue or evaluated that important capability.  The 
> little FunCube Dongle Pro+ also has filtering, but I don't know how good it 
> is. It covers only 192 kHz at a time, but is 16-bits, so has greater dynamic 
> range. The SDRPlay RSP2 is probably more useful, thanks to its greater 
> display bandwidth.
> 
> With any of these radios, N7WS's calibration method (or something like it) 
> should be used. Another suggestion -- take your test setup to a spot in the 
> middle of nowhere -- no buildings, no power lines, no solar or wind arrays -- 
> and look at the noise floor there. Save those data as a reference -- that's 
> your objective at a new QTH.
> 
> Also, look around the area, and apply common sense. Are there houses? Farms? 
> Businesses? Radio towers? Cell towers? All are likely to have dozens of noise 
> sources, either now or in the future. My applications note on chasing RFI 
> talks about many of them.
> 
> 73, Jim K9YC
> 
> On 8/1/2017 10:21 AM, Jim Miller wrote:
>> I have an RSP1 and it works well with the free software available to do 
>> spectrum work. I particularly like HDSDR's ability to make long term 
>> recordings.
>> 
>> However I found it of limited use on 160m due to AMBC interference since it 
>> doesn't have much (or any?) front end filtering. I'm 30 miles north of 
>> Baltimore where the AMBC originates.
>> 
>> I put a brickwall filter in front of it and it worked very well afterwards.
>> 
>> I've recently bought an RSP2Pro which has better filtering in it which I 
>> hope will eliminate the need for the external filter. I haven't had time to 
>> even plug it in yet.
> 
> 
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Re: [Elecraft] [K3] Using K3 for relative noise survey

[Jim Brown]

Thanks Jim.  I live out in the country, at least 30 miles from any high 
power AM BC, so haven't had this issue or evaluated that important 
capability.  The little FunCube Dongle Pro+ also has filtering, but I 
don't know how good it is. It covers only 192 kHz at a time, but is 
16-bits, so has greater dynamic range. The SDRPlay RSP2 is probably more 
useful, thanks to its greater display bandwidth.


With any of these radios, N7WS's calibration method (or something like 
it) should be used. Another suggestion -- take your test setup to a spot 
in the middle of nowhere -- no buildings, no power lines, no solar or 
wind arrays -- and look at the noise floor there. Save those data as a 
reference -- that's your objective at a new QTH.


Also, look around the area, and apply common sense. Are there houses? 
Farms? Businesses? Radio towers? Cell towers? All are likely to have 
dozens of noise sources, either now or in the future. My applications 
note on chasing RFI talks about many of them.


73, Jim K9YC

 On 8/1/2017 10:21 AM, Jim Miller wrote:
I have an RSP1 and it works well with the free software available to 
do spectrum work. I particularly like HDSDR's ability to make long 
term recordings.


However I found it of limited use on 160m due to AMBC interference 
since it doesn't have much (or any?) front end filtering. I'm 30 miles 
north of Baltimore where the AMBC originates.


I put a brickwall filter in front of it and it worked very well 
afterwards.


I've recently bought an RSP2Pro which has better filtering in it which 
I hope will eliminate the need for the external filter. I haven't had 
time to even plug it in yet.



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Re: [Elecraft] [K3] Using K3 for relative noise survey

[Jim Miller]

I have an RSP1 and it works well with the free software available to do
spectrum work. I particularly like HDSDR's ability to make long term
recordings.

However I found it of limited use on 160m due to AMBC interference since it
doesn't have much (or any?) front end filtering. I'm 30 miles north of
Baltimore where the AMBC originates.

I put a brickwall filter in front of it and it worked very well afterwards.

I've recently bought an RSP2Pro which has better filtering in it which I
hope will eliminate the need for the external filter. I haven't had time to
even plug it in yet.

73

jim ab3cv

On Tue, Aug 1, 2017 at 1:04 PM, Jim Brown  wrote:

> Dave's advice and techniques are excellent, and I've incorporated them
> into my talks and writing on chasing RFI.
>
> 73, Jim K9YC
>
>  On 8/1/2017 9:18 AM, Dave Cole wrote:
>
>> Might I suggest this:
>>
>> http://nk7z.net/sdr-rfi-survey-p1/
>>
>> blog entry.  It is a way of using a cheap SDR to get an overview of your
>> RFI environment, and a way of being able to compare two environments.
>>
>> We are going to move soon, and I wanted a way to do exactly what you
>> described here.  I wanted a way to characterize the RFI on an entire ham
>> band at once, and this fills the bill well.
>>
>
>
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Re: [Elecraft] K3S Kit issue - Does not transmit in SSB

[GRANT YOUNGMAN]

Perhaps this thread — if it continues — should be renamed to what it is, a "PC 
Operating System fail” or something.  :-)

> 
> On Tue, Aug 1, 2017 at 10:54 VE8EM  wrote:
> 
>> Finally,  I was about to give up but I managed to solve the issue.
>> 
>> After hours of configuration checking and trials, I installed some Windows
>> update which prompted a restart.

Grant NQ5T
K3 #2091, KX3 #8342



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Re: [Elecraft] [K3] Using K3 for relative noise survey

[Jim Brown]

Dave's advice and techniques are excellent, and I've incorporated them 
into my talks and writing on chasing RFI.


73, Jim K9YC

 On 8/1/2017 9:18 AM, Dave Cole wrote:

Might I suggest this:

http://nk7z.net/sdr-rfi-survey-p1/

blog entry.  It is a way of using a cheap SDR to get an overview of 
your RFI environment, and a way of being able to compare two 
environments.


We are going to move soon, and I wanted a way to do exactly what you 
described here.  I wanted a way to characterize the RFI on an entire 
ham band at once, and this fills the bill well. 



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Re: [Elecraft] Tx Mon Display

[Roger via Elecraft]

Hi Paul,

Thank you for quick and detailed response.

73, Roger



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[Elecraft] WSJT-X and PTT

[Mike Harris]

For what it's worth. I have run JT65, FT8 and WSPR from WSJT-X using my 
K3 #00345 fitted with the latest K3s digital I/O module. PTT mode no 
problems. The USB port is handling everything, audio, CAT (PTT and band 
switching).


When using Logger32 for CAT, RTTY/PSK audio, software CW, again it's all 
over the USB cable.


Regards,

Mike VP8NO
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Re: [Elecraft] [K3] Using K3 for relative noise survey

[Jim Brown]

On 8/1/2017 6:33 AM, Rick Miller - N1RM wrote:

I currently live in a townhouse and have made an offer on a few acres in a
more rural area. I would like to measure the relative noise levels between
the two locations to reduce the probability of surprises or disappointments
should I close the deal.  I have gotten access to a very good battery
powered spectrum analyzer and plan to use a tripod-mounted 6 foot whip and a
20 dB LNA to measure the noise levels at each location.


Hi Rick,

There are several good, inexpensive SDR receivers that plug into and are 
powered by a USB port. The SDR Play1 costs about $130 at HRO. See 
k9yc.com/KillingRXNoiseVisalia.ppt  for a list of several others. 
There's good freeware from multiple sources to produce excellent 
spectrum displays and get RX audio out of a computer speaker. There's 
also freeware for Android and iPhone. Also study the link above for what 
sort of noise sources to look for, and how to identity the shources you 
see.


73, Jim K9YC


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[Elecraft] The KXPA100 has been sold subject to receipt of funds. Dave W7VM

[David Gow]

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Re: [Elecraft] K3S Kit issue - Does not transmit in SSB

[rich hurd WC3T]

I have had the same thing happen to me numerous times, albeit not with
radio control software.   The machine will just lose its freaking mind and
when I shut it down, it'll begin installing downloaded (uninstalled)
updates.  I call it the computer's "throwing a temper tantrum."

On Tue, Aug 1, 2017 at 10:54 VE8EM  wrote:

> Finally,  I was about to give up but I managed to solve the issue.
>
> After hours of configuration checking and trials, I installed some Windows
> update which prompted a restart.
>
> After restarting the computer, and being quite stubborn, I decided to give
> it another try...  And it magically worked, no changes needed in the
> settings, just a computer restart and the driver settled I guess and it has
> worked since then...
>
> Hopefully it will stay that way!
>
>
>
> --
> View this message in context:
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> Sent from the Elecraft mailing list archive at Nabble.com.
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-- 
73 (or 72 for the QRP folks),
Rich Hurd / WC3T
DMR ID: 3142737
Northampton County RACES
EPA-ARRL Public Information Officer for Scouting
Latitude: 40.761621 Longitude: -75.288988  (40°45.68' N 75°17.33' W) Grid:
*FN20is*
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Re: [Elecraft] [K3] Using K3 for relative noise survey

[Wes Stewart]

I was going to recommend what Don says with a twist.  (BTW, it's page 38 in the 
K3S manual)


To get a normalized noise reading, terminate the RX antenna connector, select it 
and let the AFV value stabilize.  Then select the normal antenna and the dBV 
display.  This will display the ratio of external noise to a 50 Ohm 
termination.  Mode and BW will have some effect but as long as they are constant 
you will get good info.  Of course, all of this assumes no signals in the passband.


Wes  N7WS

On 8/1/2017 7:58 AM, Don Wilhelm wrote:

Dave,

You can use the Alternate VFO B display of AFV to give better resolution than 
the S-meter.  See page 36 of the K3 manual.  You must have the CONFIG: TECH 
MODE turned on to show the AFV entry.


If you want to see the difference between two values, there is also the DBV 
alternate VFO B display which will show the difference in dB between 2 noise 
or signal settings.


73,
Don W3FPR

On 8/1/2017 10:17 AM, Dave Sublette wrote:



I currently live in a townhouse and have made an offer on a few acres in a
more rural area. I would like to measure the relative noise levels between
the two locations to reduce the probability of surprises or disappointments
should I close the deal.  I have gotten access to a very good battery
powered spectrum analyzer and plan to use a tripod-mounted 6 foot whip and a
20 dB LNA to measure the noise levels at each location.

While setting this up, I though it would be interesting to try to also use
the K3 to measure noise with the same antenna (but without the LNA).  I've
written a Python script to control the K3 as it steps through each band and
records S meter levels.

I'm looking for recommendations on K3 settings for this purpose.  Specific
questions I have are:

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Re: [Elecraft] Tx Mon Display

[n6hz]

Hi Roger,

No that is not possible with the current design.  The TXMON feature detects
and displays the DC envelope of the RF signal.  In order to display actual
RF spectrum we would need to use a different coupler (direct sampling) and
we'd also need a much faster analog to digital converter.

Kindly,

Paul



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Re: [Elecraft] KX2 added to Sherwood's list

[w4sc]

A ”temporary” FW fix may be to make the BW settings reside on 50Hz boundary’s 
every 100Hz  i.e. 150,250,,,2150,,, as adjusted. I doubt if the ‘tween settings 
“00” would be missed.



73 de Ben W4SC.

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Re: [Elecraft] [K3] Using K3 for relative noise survey

[Dave Cole]

On 08/01/2017 06:33 AM, Rick Miller - N1RM wrote:

I currently live in a townhouse and have made an offer on a few acres in a
more rural area. I would like to measure the relative noise levels between
the two locations to reduce the probability of surprises or disappointments
should I close the deal.  I have gotten access to a very good battery
powered spectrum analyzer and plan to use a tripod-mounted 6 foot whip and a
20 dB LNA to measure the noise levels at each location.

While setting this up, I though it would be interesting to try to also use
the K3 to measure noise with the same antenna (but without the LNA).  I've
written a Python script to control the K3 as it steps through each band and
records S meter levels.


Might I suggest this:

http://nk7z.net/sdr-rfi-survey-p1/

blog entry.  It is a way of using a cheap SDR to get an overview of your 
RFI environment, and a way of being able to compare two environments.


We are going to move soon, and I wanted a way to do exactly what you 
described here.  I wanted a way to characterize the RFI on an entire ham 
band at once, and this fills the bill well.



My first run through very late last night showed almost no variation across
any of the bands.  I did see differences between bands.  Right now I pause
for 1 second after setting band, mode, and bandwidth, and then another
second after each frequency change (stepping in 10 KHz increments) for
things to settle.
  I don't know the dynamics of the S-meter processing, so maybe I should be
waiting longer.


I believe you need to be looking at a wider bandwidth than the K3 will 
provide, hence the the use of an SDR in the above suggested read.  It 
takes a few days to create the spectrograms, but they will show you 
EXACTLY what is happening on the entire band.


Thanks, and 73's,
Dave (NK7Z)
http://www.nk7z.net
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[Elecraft] KX3 Sold, KXPA Still Avaiable

[David Gow]

The KX3 has sold and the KXPA100 is still available.  Several people have
asked if it has the internal tuner and yes, it does along with the adapter
cable to transceive with the KX3, power cable, right angle coax cable and
manual.  Purchased new in August 2015 and factory assembled.  I have
reduced the price to $700 not including shipping.  Shipping is in original
factory packing.

73  Dave W7VM
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Re: [Elecraft] [K3] Using K3 for relative noise survey

[Walter Underwood]

Wizkers:io or Wizkers:radio may already do that scanning that you want. I know 
you’ve written it in Python, but Ed may have worked out the kinks in the 
measurements.

http://www.wizkers.io/buy-or-diy 

wunder
K6WRU
Walter Underwood
CM87wj
http://observer.wunderwood.org/ (my blog)

> On Aug 1, 2017, at 7:58 AM, Don Wilhelm  wrote:
> 
> Dave,
> 
> You can use the Alternate VFO B display of AFV to give better resolution than 
> the S-meter.  See page 36 of the K3 manual.  You must have the CONFIG: TECH 
> MODE turned on to show the AFV entry.
> 
> If you want to see the difference between two values, there is also the DBV 
> alternate VFO B display which will show the difference in dB between 2 noise 
> or signal settings.
> 
> 73,
> Don W3FPR
> 
> On 8/1/2017 10:17 AM, Dave Sublette wrote:
> 
>>> 
>>> I currently live in a townhouse and have made an offer on a few acres in a
>>> more rural area. I would like to measure the relative noise levels between
>>> the two locations to reduce the probability of surprises or disappointments
>>> should I close the deal.  I have gotten access to a very good battery
>>> powered spectrum analyzer and plan to use a tripod-mounted 6 foot whip and a
>>> 20 dB LNA to measure the noise levels at each location.
>>> 
>>> While setting this up, I though it would be interesting to try to also use
>>> the K3 to measure noise with the same antenna (but without the LNA).  I've
>>> written a Python script to control the K3 as it steps through each band and
>>> records S meter levels.
>>> 
>>> I'm looking for recommendations on K3 settings for this purpose.  Specific
>>> questions I have are:
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Re: [Elecraft] [K3] Using K3 for relative noise survey

[Don Wilhelm]

Dave,

You can use the Alternate VFO B display of AFV to give better resolution 
than the S-meter.  See page 36 of the K3 manual.  You must have the 
CONFIG: TECH MODE turned on to show the AFV entry.


If you want to see the difference between two values, there is also the 
DBV alternate VFO B display which will show the difference in dB between 
2 noise or signal settings.


73,
Don W3FPR

On 8/1/2017 10:17 AM, Dave Sublette wrote:



I currently live in a townhouse and have made an offer on a few acres in a
more rural area. I would like to measure the relative noise levels between
the two locations to reduce the probability of surprises or disappointments
should I close the deal.  I have gotten access to a very good battery
powered spectrum analyzer and plan to use a tripod-mounted 6 foot whip and a
20 dB LNA to measure the noise levels at each location.

While setting this up, I though it would be interesting to try to also use
the K3 to measure noise with the same antenna (but without the LNA).  I've
written a Python script to control the K3 as it steps through each band and
records S meter levels.

I'm looking for recommendations on K3 settings for this purpose.  Specific
questions I have are:

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Re: [Elecraft] K3S Kit issue - Does not transmit in SSB

[VE8EM]

Finally,  I was about to give up but I managed to solve the issue. 

After hours of configuration checking and trials, I installed some Windows
update which prompted a restart. 

After restarting the computer, and being quite stubborn, I decided to give
it another try...  And it magically worked, no changes needed in the
settings, just a computer restart and the driver settled I guess and it has
worked since then... 

Hopefully it will stay that way! 



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Re: [Elecraft] KX2 added to Sherwood's list

[Wayne Burdick]

The cause of this is likely to be straightforward. One of our software 
engineers is looking into it. Once we have the fix in place, we hope to get a 
KX2 to Rob for retesting.

A temporary workaround (if needed due to QRM) is to use 450 instead of 500 Hz, 
etc. 

Wayne
N6KR


http://www.elecraft.com

> On Aug 1, 2017, at 4:25 AM, John Reilly  wrote:
> 
> John, N0TA, forwarded this question to me about why I listed the KX2 close-in 
> dynamic range at 3 kHz rather than the more typical 2 kHz. Some radios have 
> limitations that make a measurement at 2-kHz impossible or invalid.  If a 
> valid measurement cannot be made at 2 kHz, then it is made at some wider 
> spacing, such as 3, 4 or 5 kHz.  Typically if a measurement cannot be made at 
> 2 kHz, it is because of filter leakage. When a test is made at 2-KHz, for 
> example, the third-order intermodulation products are 2-kHz below the lower 
> frequency test tone and 2-kHz above the higher frequency test tone.  If the 
> radio cannot reject the test tone that is 2-kHz away, then it is impossible 
> to measure the third-order distortion product.
> 
> In the case of the KX2, I could measure the low side distortion product at 2 
> kHz with no problem using the standard 500-Hz filter bandwidth.  On the other 
> hand, when measuring the distortion product on the high side, the filter in 
> the KX2 does not reject the test tone that is 2 kHz away. Two different KX2 
> radios were tested, and both showed this identical anomaly.  If one reads the 
> ARRL report on the KX2, you will see that the reviewer mentioned the filter 
> leakage when tuned above a strong signal.
> 
> Here are the odd details on the KX2 filter leakage.  If the filter bandwidth 
> is 500, 400, 300, 200 or 100 Hz, filter leakage makes the measurement at 2 
> kHz impossible.  On the other hand, if the filter bandwidth is 550, 450, 350, 
> 250, 150 or 50 Hz, then the measurement can be made.  The League chose to 
> publish a 2-kHz dynamic range in QST even though the measurement cannot be 
> made on the high side with the standardized 500-Hz filter bandwidth (or any 
> even bandwidth value). Note:  Both the League and I only publish the LOWER of 
> the two measurements.  Let’s say the low side dynamic range of some radio is 
> 95 dB and the high side is 90 dB.  Both the League and I publish the lower 
> worse-case 90 dB number. In the case of the KX2, I couldn’t pick the lower of 
> the two readings since no measurement is possible when using the standard 
> 500-Hz filter.
> 
> Since the 2-kHz dynamic range value could not be made with the standard 
> filter bandwidth at 2 kHz, but could be made at a 3-kHz signal spacing, I 
> published that data.  It may be of interest that the 2-kHz dynamic range 
> number with the non-standard 450-Hz bandwidth was only 1 dB worse than the 
> 3-kHz value.  The point of listing the 3-kHz value, or any other radio with a 
> non-2 kHz listing is to point out the radio has a limitation in its filter 
> performance.
> 
> My long form report on the KX2, available in PDF format, goes into detail 
> about this issue, and has data on the two radios I tested, listed by serial 
> number.
> 
> At this point, Elecraft does not know why the KX2 behaves this way, or 
> whether there is a possible firmware fix.
> 
> Rob Sherwood
> NC0B
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Re: [Elecraft] [K3] Using K3 for relative noise survey

[Dave Sublette]

Don’t forget to look for noise in vertical and horizontal polarity.

Dave,

   K4TO
> On Aug 1, 2017, at 9:33 AM, Rick Miller - N1RM  wrote:
> 
> I currently live in a townhouse and have made an offer on a few acres in a
> more rural area. I would like to measure the relative noise levels between
> the two locations to reduce the probability of surprises or disappointments
> should I close the deal.  I have gotten access to a very good battery
> powered spectrum analyzer and plan to use a tripod-mounted 6 foot whip and a
> 20 dB LNA to measure the noise levels at each location.
> 
> While setting this up, I though it would be interesting to try to also use
> the K3 to measure noise with the same antenna (but without the LNA).  I've
> written a Python script to control the K3 as it steps through each band and
> records S meter levels.
> 
> I'm looking for recommendations on K3 settings for this purpose.  Specific
> questions I have are:
> 
> 1. Is the high resolution S meter command (SMH) the best way to measure
> received signal strength with a computer?
> 
> 2. What settings for attenuator, pre-amp, and AGC will give me the most
> useful readings? Right now I'm using Off, On, and Off respectively for those
> settings.
> 
> 3. What Mode and Bandwidth settings should I use?  Right now I'm using CW
> and 200 Hz.  I'm pretty sure I should be using a wider bandwidth and will
> try that tonight.
> 
> 4. Is this a dumb idea?
> 
> My first run through very late last night showed almost no variation across
> any of the bands.  I did see differences between bands.  Right now I pause
> for 1 second after setting band, mode, and bandwidth, and then another
> second after each frequency change (stepping in 10 KHz increments) for
> things to settle.
> I don't know the dynamics of the S-meter processing, so maybe I should be
> waiting longer.
> 
> Thanks for reading this.
> 
> Rick
> N1RM
> 
> 
> 
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[Elecraft] [K3] Using K3 for relative noise survey

[Rick Miller - N1RM]

I currently live in a townhouse and have made an offer on a few acres in a
more rural area. I would like to measure the relative noise levels between
the two locations to reduce the probability of surprises or disappointments
should I close the deal.  I have gotten access to a very good battery
powered spectrum analyzer and plan to use a tripod-mounted 6 foot whip and a
20 dB LNA to measure the noise levels at each location.

While setting this up, I though it would be interesting to try to also use
the K3 to measure noise with the same antenna (but without the LNA).  I've
written a Python script to control the K3 as it steps through each band and
records S meter levels.

I'm looking for recommendations on K3 settings for this purpose.  Specific
questions I have are:

1. Is the high resolution S meter command (SMH) the best way to measure
received signal strength with a computer?

2. What settings for attenuator, pre-amp, and AGC will give me the most
useful readings? Right now I'm using Off, On, and Off respectively for those
settings.

3. What Mode and Bandwidth settings should I use?  Right now I'm using CW
and 200 Hz.  I'm pretty sure I should be using a wider bandwidth and will
try that tonight.

4. Is this a dumb idea?

My first run through very late last night showed almost no variation across
any of the bands.  I did see differences between bands.  Right now I pause
for 1 second after setting band, mode, and bandwidth, and then another
second after each frequency change (stepping in 10 KHz increments) for
things to settle.
 I don't know the dynamics of the S-meter processing, so maybe I should be
waiting longer.

Thanks for reading this.

Rick
N1RM



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[Elecraft] KX2 added to Sherwood's list

[John AE5X]

I'd be interested in reading the longer KX2 report he mentions but couldn't 
find it on his site. Anyone have a link?

John AE5X
http://ae5x.blogspot.com/
_

>My long form report on the KX2, available in PDF format,



.

3 Common Foods Surgeons Are Now Calling "Death Foods"
Nucific
http://thirdpartyoffers.juno.com/TGL3131/598073b7d179373b75047st02vuc
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[Elecraft] KX2 added to Sherwood's list

[John Reilly]

John, N0TA, forwarded this question to me about why I listed the KX2 
close-in dynamic range at 3 kHz rather than the more typical 2 kHz. 
Some radios have limitations that make a measurement at 2-kHz impossible 
or invalid.  If a valid measurement cannot be made at 2 kHz, then it is 
made at some wider spacing, such as 3, 4 or 5 kHz.  Typically if a 
measurement cannot be made at 2 kHz, it is because of filter leakage. 
When a test is made at 2-KHz, for example, the third-order 
intermodulation products are 2-kHz below the lower frequency test tone 
and 2-kHz above the higher frequency test tone.  If the radio cannot 
reject the test tone that is 2-kHz away, then it is impossible to 
measure the third-order distortion product.


In the case of the KX2, I could measure the low side distortion product 
at 2 kHz with no problem using the standard 500-Hz filter bandwidth.  On 
the other hand, when measuring the distortion product on the high side, 
the filter in the KX2 does not reject the test tone that is 2 kHz away. 
Two different KX2 radios were tested, and both showed this identical 
anomaly.  If one reads the ARRL report on the KX2, you will see that the 
reviewer mentioned the filter leakage when tuned above a strong signal.


Here are the odd details on the KX2 filter leakage.  If the filter 
bandwidth is 500, 400, 300, 200 or 100 Hz, filter leakage makes the 
measurement at 2 kHz impossible.  On the other hand, if the filter 
bandwidth is 550, 450, 350, 250, 150 or 50 Hz, then the measurement can 
be made.  The League chose to publish a 2-kHz dynamic range in QST even 
though the measurement cannot be made on the high side with the 
standardized 500-Hz filter bandwidth (or any even bandwidth value). 
Note:  Both the League and I only publish the LOWER of the two 
measurements.  Let’s say the low side dynamic range of some radio is 95 
dB and the high side is 90 dB.  Both the League and I publish the lower 
worse-case 90 dB number. In the case of the KX2, I couldn’t pick the 
lower of the two readings since no measurement is possible when using 
the standard 500-Hz filter.


Since the 2-kHz dynamic range value could not be made with the standard 
filter bandwidth at 2 kHz, but could be made at a 3-kHz signal spacing, 
I published that data.  It may be of interest that the 2-kHz dynamic 
range number with the non-standard 450-Hz bandwidth was only 1 dB worse 
than the 3-kHz value.  The point of listing the 3-kHz value, or any 
other radio with a non-2 kHz listing is to point out the radio has a 
limitation in its filter performance.


My long form report on the KX2, available in PDF format, goes into 
detail about this issue, and has data on the two radios I tested, listed 
by serial number.


At this point, Elecraft does not know why the KX2 behaves this way, or 
whether there is a possible firmware fix.


Rob Sherwood
NC0B
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Re: [Elecraft] [K2] Random LCD display - Speed and Power

[Martin Rath]

Hi Don,

Thanks for your usual support.

I built the K2 back in 2004 : I don't know if it would have the new or the
old encoder board.

I would need to check what type of encoder board I have inside but I cannot
recal having it on a different board (and by looking at the construction
manual that I have it doesn't seem to refer to any additional control
board). I have no mean to actually open it here as I'm far from my work
bench.  Are you refering to the board described in this manual :
http://www.elecraft.com/manual/E740177%20K2%20Encoder%20Installation%20Instructions,%20rev%20B.pdf
? If yen then I clearly have the old one with the long leads. In my manual
it's described in figures 5-18 and 5-19 on page 32.

The K2 had not been used for several years (almost 6 !). It has now been
plugged to a battery for over 48 hours and doesn't exibit the blinking
phenoma anymore (and it never did befofre. I wonder if it could be related
to chemical capacitors ...


73's Martin 9V1RM



On Mon, Jul 31, 2017 at 1:01 PM, Don Wilhelm  wrote:

> Martin,
>
> While that may happen rarely in any K2 - when the firmware is quite busy,
> your video shows it happening frequently, which is abnormal.
>
> The most common cause of that behavior is in late K2s with the new encoder
> - the one with the encoder board that sits close to the control board.  If
> that describes your K2, then flush cut the encoder board leads (really
> close to the board) and do the same on the control board in the area where
> the encoder board can contact the solder side of the Control Board.
>
> If your K2 has the older encoder, then look for a bad solder connection on
> either the Control board or the Front Panel board.
>
> 73,
> Don W3FPR
>
>
> On 7/31/2017 5:06 AM, Martin Rath wrote:
>
>> Hi,
>>
>> I happen to be in Europe for a few weeks of holidays and wanted to use my
>> old K2 that I never imported into Singapore for some QSO's.
>>
>> I'm facing an issue with the LCD randomly flickering and displaying the
>> power and speed.
>>
>> I have also experienced that when I'm in the middle of a QSO the speed
>> will
>> randomly change.
>>
>>
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