[Elecraft] K4 Operating Manual rev. C1 now available

[Wayne Burdick]

Revision C1 of the K4 operating manual can be found online at this link:

https://ftp.elecraft.com/K4/Manuals%20Downloads/K4%20Built-In%20Operating%20Manual%20rev%20C1/K4BuiltInOperatingManualrevC1.html

We’ll be updating the built-in manual (in the radio itself) in a future 
software release.

73,
Wayne
N6KR


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[Elecraft] New: K4 software information page

[Wayne Burdick]

K4 software update is handled entirely at the radio itself. You can view the 
release notes there, too.

You can now also see the release notes for the current production release on 
our K4 software page.

Visit www.elecraft.com, then click on SUPPORT / SOFTWARE, and select K-Line / 
K4.

73,
Wayne
N6KR


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Re: [Elecraft] Funny K4 Story

[Wayne Burdick]

This is correct.

Wayne


> On May 16, 2021, at 4:40 PM, Alan Bloom  wrote:
> 
> I believe the SWR meter in the transceiver is at the input of the internal 
> tuner, not the output.  Since it always reads close to 1:1 when the tuner is 
> engaged you may not notice if the antenna has a high SWR.
> 
> Alan N1AL
> 
> 
> On 5/16/2021 5:10 PM, Wayne Burdick wrote:
>> The K4 shows all four TX bar graphs simultaneously:  power, SWR, ALC, and 
>> compression. In addition you can select numeric display of power, SWR, 
>> supply voltage and current drain for the status area, which defaults to 
>> date/time.
>> 
>> Wayne
>> N6KR
>> 
>> 
>> elecraft.com
>> 
>>> On May 16, 2021, at 12:18 PM, Ray  wrote:
>>> 
>>> My K3 has a SWR display next to the RF Power meter in the Display.
>>> So it Sounds like the K4 Does Not have that type of Display ?
>>> 
>>> WA6VAB  K3
>>> 
>>> 
>>>> On May 16, 2021, at 11:04 AM, Tom Doligalski via Elecraft 
>>>>  wrote:
>>>> 
>>>> ...
>>>> I normally would have noticed the change in SWR, and realized that I had 
>>>> an antenna problem. But, of course, I had tuned the K4 for the first time 
>>>> on 80M when I received it!
>>>> 
>>>> A learning moment (operator error?). Gonna try to check the antennas out a 
>>>> bit more frequently!
>>>> 
>>>> 73, Tom W4KX
>>>> 
> 
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Re: [Elecraft] Funny K4 Story

[Wayne Burdick]

The K4 shows all four TX bar graphs simultaneously:  power, SWR, ALC, and 
compression. In addition you can select numeric display of power, SWR, supply 
voltage and current drain for the status area, which defaults to date/time.

Wayne
N6KR


elecraft.com

> On May 16, 2021, at 12:18 PM, Ray  wrote:
> 
> My K3 has a SWR display next to the RF Power meter in the Display.
> So it Sounds like the K4 Does Not have that type of Display ?
> 
> WA6VAB  K3
> 
> 
> From: Roger Stein
> Sent: Sunday, May 16, 2021 7:11 AM
> To: Tom Doligalski
> Cc: Elecraft List
> Subject: Re: [Elecraft] Funny K4 Story
> 
> Great story and wisdom moment Tom!
> 
> 73, Roger VA1RST 
> 
> Sent from my iPhone
> 
>> On May 16, 2021, at 11:04 AM, Tom Doligalski via Elecraft 
>>  wrote:
>> 
>> Last week Monday I received K4 SN0110. The Brown Truck came at about 2 PM.
>> 
>> That morning I had checked into an 80M net using my trusty K3. For 8)M is 
>> use an inverted V. All was well.
>> 
>> Monday afternoon was a frenzy of setting up and using the new K4. Pretty 
>> easy setup.
>> 
>> All week long I used the K4. All was good, but I was disappointed at signal 
>> strengths on 80M. I kept thinking that the K4 just couldn’t receive well on 
>> 80M!
>> 
>> Yesterday I was out in the back doing yard work. That’s when I noticed that 
>> the support ropes on BOTH ends of the 80M inverted V had failed, and the the 
>> antenna was lying on the ground!
>> 
>> We had had a storm come through here Monday mid-day, and my supposition is 
>> that the support ropes had failed. I restored the support ropes, and low and 
>> below the K4 works well on 80M again!
>> 
>> I normally would have noticed the change in SWR, and realized that I had an 
>> antenna problem. But, of course, I had tuned the K4 for the first time on 
>> 80M when I received it!
>> 
>> A learning moment (operator error?). Gonna try to check the antennas out a 
>> bit more frequently!
>> 
>> 73, Tom W4KX
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[Elecraft] K4 production software release 13 now available

[Wayne Burdick]

K4 production software release 13 is now available. We strongly recommend that 
all K4 owners perform the update to remain current and take advantage of the 
latest improvements. 

An Ethernet connection is required to obtain new software. The K4 accesses our 
software server directly.

To perform the update:

1. Tap the Fn button (on the LCD), then hold UPDATE

2. Select "Production Release" from the pull-down menu at the top of the 
screen. Then tap the "Check for Updates" button. This will download (but not 
install) the latest files.

Note: You can tap "Release Notes" to read the release notes before doing an 
"Install" (step 3), if desired. You can also read them after installation.

3. Tap the "Install" button. This will install all software and firmware that 
is newer than what you have at present. 

NOTE: When the load process has completed, if you see any error messages in the 
status area of the update screen, please try loading a second time. This is a 
one-time step that may be needed that takes advantage of improvements in the 
updater itself.

For more detailed information, tap the "?" button on the LCD from within the 
update screen.

Wayne
N6KR
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[Elecraft] To new K4 owners

[Wayne Burdick]

Since the pace of K4 shipping has gone up, I wanted to again remind new owners 
to feel free to contact Eric and myself outside normal business hours. We check 
for email about all of our products frequently, of course. But new products 
generate a lot of additional questions. If you uncover a mystery that can't 
wait, we'll respond as quickly as possible.

Some operational issues or omissions you discover may find their way into the 
next update of the K4 user manuals. We appreciate your feedback!

73,
Wayne
N6KR


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Re: [Elecraft] This does not bode well for the chip users of the world

[Wayne Burdick]

I'm staying out of the politics. But clearly it'll be a banner year for the 
hat, T-shirt, and coffee mug makers of the world. No silicon.

Wayne
N6KR 


> On Apr 29, 2021, at 4:27 PM, Bill Johnson  wrote:
> 
> So sorry, but this pandemic and all the supply issues fit nicely into an 
> economic war, not just a firearms war.  The economic war has only just begun 
> which I had guessed would happen just after the Japanese, then the S. Koreans 
> now the Chinese.  This is a cultural war destined to get the US into their 
> stronghold.  But the Japanese and Koreans are now in our arena?
> 
> I hope the chips and high tech will move back to US like the good old days.  
> Too bad for our US companies to be too slow to react, or the government taxes 
> and labor practices to remove our own manufacturing.  If we had chips here, 
> Elecraft, maybe others, perhaps could get parts?
> 
> Bill
> K9YEQ


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Re: [Elecraft] This does not bode well for the chip users of the world

[Wayne Burdick]

Many off-the-shelf parts are affected as well. 

Wayne 


elecraft.com

> On Apr 29, 2021, at 1:13 PM, Linda M  wrote:
> 
> 
> Hi Wayne.
> I would think the Parts you use are Off the Shelf Semiconductors.
> The Auto Industry are Custom Fab semiconductors. 
> Ray WA6VAB  K3
>  
> From: Wayne Burdick
> Sent: Thursday, April 29, 2021 11:40 AM
> To: Mark Goldberg
> Cc: Elecraft Reflector
> Subject: Re: [Elecraft] This does not bode well for the chip users of the 
> world
>  
> Indeed, it's a ubiquitous curse. Fortunately we stocked up far in advance on 
> most parts and assemblies.
>  
> Wayne
> N6KR
>  
>  
>  
>  
> > On Apr 29, 2021, at 10:39 AM, Mark Goldberg  wrote:
> >
> > For smaller customers that are not buying millions of parts at a time, it
> > is even worse, as they have no leverage. That includes the company I am
> > working for and I would assume companies like Elecraft. Even for simple
> > orders from distributors of in stock parts they are taking a week to ship
> > rather than the usual next day shipment. It is really disruptive.
> >
> > Regards,
> >
> > Mark
> >
> > On Thu, Apr 29, 2021 at 10:20 AM Dave Cole  wrote:
> >
> >> An interesting story from OPB dealing with the global shortage of chips...
> >>
> >>
> >> https://www.opb.org/article/2021/04/29/it-s-not-just-cars-ipads-and-macs-suffer-from-semiconductor-crunch/
> >>
> >> --
> >> 73, and thanks,
> >> Dave (NK7Z)
> >> https://www.nk7z.net
> >> ARRL Volunteer Examiner
> >> ARRL Technical Specialist, RFI
> >> ARRL Asst. Director, NW Division, Technical Resources
> >> __
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> >>
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Re: [Elecraft] This does not bode well for the chip users of the world

[Wayne Burdick]

Indeed, it's a ubiquitous curse. Fortunately we stocked up far in advance on 
most parts and assemblies. 

Wayne
N6KR




> On Apr 29, 2021, at 10:39 AM, Mark Goldberg  wrote:
> 
> For smaller customers that are not buying millions of parts at a time, it
> is even worse, as they have no leverage. That includes the company I am
> working for and I would assume companies like Elecraft. Even for simple
> orders from distributors of in stock parts they are taking a week to ship
> rather than the usual next day shipment. It is really disruptive.
> 
> Regards,
> 
> Mark
> 
> On Thu, Apr 29, 2021 at 10:20 AM Dave Cole  wrote:
> 
>> An interesting story from OPB dealing with the global shortage of chips...
>> 
>> 
>> https://www.opb.org/article/2021/04/29/it-s-not-just-cars-ipads-and-macs-suffer-from-semiconductor-crunch/
>> 
>> --
>> 73, and thanks,
>> Dave (NK7Z)
>> https://www.nk7z.net
>> ARRL Volunteer Examiner
>> ARRL Technical Specialist, RFI
>> ARRL Asst. Director, NW Division, Technical Resources
>> __
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[Elecraft] New K4 software release

[Wayne Burdick]

A new production release of K4 software is available (release 12). To do an 
update, make sure you have an Ethernet connection, then:

1. Tap the Fn button (on the LCD), then hold UPDATE

2. Select "Production Release" from the pull-down menu at the top of the 
screen. Then tap the Check for Updates button. This will load (but not install) 
the latest files.

Note: You can tap "Release Notes" to read the release notes before updating, if 
desired. You can also read them after updating.

3. Tap the "Install" button. This will install all software and firmware that 
is newer than what you have at present. 

Wayne
N6KR


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Re: [Elecraft] T1 and IC705 interface

[Wayne Burdick]

Hi Edd,

Thanks for asking. It's still in progress, and we'll provide full details when 
available.

73,
Wayne
N6KR


> On Apr 27, 2021, at 5:37 PM, Edward Seeliger  wrote:
> 
> Is there any update information about the availability of the T1 to IC705 
> interface?
> Edd KD5M
> 
> Sent from my iPad
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[Elecraft] OT: High school drafting class, ~1975

[Wayne Burdick]

OK, I've really dated myself now. 

Anyone remember "drafting"? A favorite class in high school: blueprints, 
mechanical drawings, schematics, straight edges, hand lettering, projections 
and elevations. We invented things to draw that weren't real, but looked like 
they should be. Did all the math by hand -- on a slide rule, if necessary. 
Day-dreamed about what we might one day build.

45 years later, we're using tools we couldn't have imagined. Modeling circuits 
and objects with millions of parameters and vectors, realizing them in virtual 
space, manipulating them in real time. Testing finished products before they're 
even assembled.

The transformation is mind boggling. Yet the best part now, as it was then, is 
the occasional burst of creative energy that propels an idea forward. The 
feeling of pieces falling into place. Or forcing them into place out of sheer 
necessity. 

Most of the time, we think of our new tools and techniques as advances in the 
state of the art. Things we can't live without. But those same defining moments 
happened just as often in simpler times.

Case in point -- my first real project, a rendition of W7ZOI's 
Micro-mountaineer. Carefully documenting it took several sheets of 
4-squares-per-inch grid paper, which may still be in my cellar, beneath a 
lifetime of such drawings. With the schematic, I took a lot of pride in making 
the circuits look well-organized, as if that would somehow improve my odds. On 
the PC board, I drew large traces and pads with the etch-resist pen, as if that 
would somehow appease the electrons. 

I etched the PCB, soldered two dozen parts, and connected a 12 V lantern 
battery. Thanks to my paranoia about what would happen if I did it wrong, I'd 
taken my time and done it right. 

I was rewarded with a hiss of band noise and a few CW signals on 40 meters.

Here's to those moments, and to that timeless pursuit: turning abstractions 
into reality.

73,
Wayne
N6KR

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Re: [Elecraft] Miniature version of AX1 whip

[Wayne Burdick]

Correct. 2” loading coil, 45” whip. 

Wayne
N6KR


elecraft.com

> On Apr 20, 2021, at 9:52 AM, Lyn Norstad  wrote:
> 
> Gary -
> 
> I think he's talking about the length of the loading coil, not the whole
> whip.  So 2.0 inches would be appropriate.
> 
> 73
> Lyn, W0LEN
> 
> 
> -Original Message-
> From: elecraft-boun...@mailman.qth.net
> [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of n6...@outlook.com
> Sent: Tuesday, April 20, 2021 11:07 AM
> To: Wayne Burdick; Elecraft Reflector
> Subject: Re: [Elecraft] Miniature version of AX1 whip
> 
> Wayne,
> did you mean to write 2.0 inches for the length? Did you mean 2.0 feet
> (2.0')?
> 
> Gary
> 
> ________
> From: elecraft-boun...@mailman.qth.net  on
> behalf of Wayne Burdick 
> Sent: Monday, April 19, 2021 6:13 PM
> To: Elecraft Reflector 
> Subject: [Elecraft] Miniature version of AX1 whip
> 
> I'm always trying to further shrink my KX2 station, especially for hand-held
> operation.
> 
> Recently I've been playing with a miniature base loading coil for the the
> AX1 whip. It's very rugged, but also really small:
> 
>   Length = 2.0" (1/3rd of the AX1)
>   Weight = 0.7 oz   (1/3rd of the AX1)
> 
> It takes up almost no room in a go-bag, making it a great backup for other
> antennas. Wind load is also greatly reduced -- that will help when using the
> AXB1 bipod.
> 
> Compared to the AX1 it will have a somewhat reduced max power rating
> (probably 10 W), and it only covers one band. On the other hand, it could be
> built for any band from 20 to 6 meters, and disassembles into two pieces
> like the AX1.
> 
> I consider it experimental at this point, and I'd love to get some feedback
> on the concept. We'll have some prototypes to send out sometime in the near
> future to a few volunteer testers.
> 
> Please contact me directly if you're interested.
> 
> 73,
> Wayne
> N6KR
> 
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[Elecraft] Miniature version of AX1 whip

[Wayne Burdick]

I'm always trying to further shrink my KX2 station, especially for hand-held 
operation. 

Recently I've been playing with a miniature base loading coil for the the AX1 
whip. It's very rugged, but also really small:

   Length = 2.0" (1/3rd of the AX1)
   Weight = 0.7 oz   (1/3rd of the AX1)

It takes up almost no room in a go-bag, making it a great backup for other 
antennas. Wind load is also greatly reduced -- that will help when using the 
AXB1 bipod.

Compared to the AX1 it will have a somewhat reduced max power rating (probably 
10 W), and it only covers one band. On the other hand, it could be built for 
any band from 20 to 6 meters, and disassembles into two pieces like the AX1. 

I consider it experimental at this point, and I'd love to get some feedback on 
the concept. We'll have some prototypes to send out sometime in the near future 
to a few volunteer testers.

Please contact me directly if you're interested.

73,
Wayne 
N6KR

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[Elecraft] Do not use K4 "Restore Defaults" button

[Wayne Burdick]

In the UPDATE function of the K4, there's a DETAILS button which leads to a 
tentative backup/restore feature. This will be replaced by a new backup/restore 
function (CONFIG) that's easier to use and accessible at the top level.

One of the buttons on the current Backup/Restore screen is "Restore Defaults," 
which does a full reset to factory defaults. We intended to remove this because 
it resets TX GAIN calibration and other data. This, too, will be handled in a 
more nuanced fashion under the CONFIG function.

Please don't use "Restore Defaults". 

While the backup/restore routines work, we'd suggest not using these either. 
CONFIG will do a much better job of managing your backup needs.

Thanks,

Wayne
N6KR



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Re: [Elecraft] KX2 Questions

[Wayne Burdick]

Hi Dave,

> On Apr 13, 2021, at 8:03 AM, djchase  wrote:
> 
> I am a long time CW operator, but new to this group.  I am considering 
> purchasing a KX2, but I have been unable to find answers to these two 
> questions:1.  What is the approximate current draw for the KX2 on transmit at 
> 5 watts CW?

Typically 1.2 to 1.5 amps, varying somewhat with supply voltage and load 
impedance.

 
> 2.  What is the narrowest receiver filter width on CW?

50 Hz primary audio filter, 30 Hz audio-peaking filter (APF). These can be 
controlled independently. The bandpass can be widened up to about 4 kHz, as 
well as shifted. The KX2 also has DSP-based noise blanking, auto-notch, and 
noise reduction.

73,
Wayne
N6KR

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[Elecraft] K4: Coolness factor meets production complexities

[Wayne Burdick]

Greetings from the mothership. 

Q: Are Eric and I keeping up with the K4 megathreads on the forums?
A: You bet.

But we're not weighing in as often as we normally would.

On the one hand, it's affirming as a small company to be at the eye of a storm 
of anxious demand. On the other hand we really feel your pain. On the third 
hand (we need three these days), we're both seriously overworked trying to ramp 
up production.

A radio with this many features and so much new tech -- the coolness factor -- 
comes with a lot of new assembly and test procedures. A whole lot of invention. 
New tricks we didn't know we had to learn. Over the past week alone our 
manufacturing engineering team probably shaved 50% off the total time per unit. 

For me, it's feast/famine. I have serial #2 on my workbench and use it 
every day. Every day there's new and improved software to be played with and 
thoroughly vetted. That's the fun part. But I also spend hours daily optimizing 
interaction between the K4's multiple processors, evolving faster ways to do 
alignment/test, and helping our software team work through a long wish-list of 
new capabilities. 

The work can be tedious. Still, every evening when the team finally knocks off 
(and I do mean every evening, including most weekends), I get another chance to 
be a kid in the candy store. This rig's just so much fun to operate. And I'm 
confident that for every new K4 that comes off the line ready for its first 
test drive, there's an operator who'll experience the same feeling I do.

Despite the K4's advanced circuitry, I'm always reminded of my very first 
efforts at home-brew, when I was maybe 15. Discovery. Tweaking. From raw parts 
with their leads twisted together to prototypes only a mother could love to 
finished product to that first demo at a club meeting. It's much the same now, 
though the parts are smaller, the tools more exotic, and the stakes higher.

What I can promise is that we're putting everything we have into the K4, like 
we have with every product over the past 20 years. We can't wait to get them 
into your hands, and hear the smiles behind the mics and keys.

73,

Wayne
N6KR



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Re: [Elecraft] K3 MCU 5.93??

[Wayne Burdick]

Typo. Should have said 5.63, I believe.

Wayne
N6KR


> On Mar 26, 2021, at 6:01 PM, Tim Tucker  wrote:
> 
> I just received the K3 AUX cable for the KPA1500.  The manual makes
> references to needing K3 MCU 5.93 or later for some of the features.  But
> the latest MCU available on the Elecraft website is 5.67...I even checked
> the FTP for beta versions.  Does anyone have any insight on where to obtain
> this version of the K3 MCU?
> 
> Tim
> -- 
> Owner, worldwidedx.com
> AE6LX, Amateur Radio
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Re: [Elecraft] Diode 95SQ015 end-of-life (K2 D10)

[Wayne Burdick]

The difference in forward voltage drop between the 95SQ015 vs. the SR1503 under 
transmit load current is only about 0.15 V. Probably not worth the trouble to 
substitute the former. 

Wayne
N6KR


elecraft.com

> On Mar 20, 2021, at 6:14 PM, Harlan Sherriff via Elecraft 
>  wrote:
> 
> https://www.solidstateinc.com/product/95sq015/
> Has 133 in stock
> 
> Sent from my iPhone
> 
>> On Mar 20, 2021, at 7:54 PM, Bruce Forsberg  wrote:
>> 
>> Just completed building a K2 kit. They had an SR1503 diode for D10 on the
>> RF board.
>> 
>> Bruce, WB6IZG
>> 
 On Sat, Mar 20, 2021 at 4:43 PM Geert Jan de Groot  
 wrote:
>>> 
>>> The high-current low-drop diode 95SQ015, used in the K2 (it replaced
>>> D10, SB530, because of it's favorable voltage drop) seems to be out of
>>> production and out of stock in the likes of Mouser, Digikey and
>>> Farnell/Newark.
>>> 
>>> I hoped the component was just replaced by a SMD version but that
>>> doesn't seem to be the case. From what I can see, low-drop diodes exist
>>> but not with the current ratings that the 95SQ015 has.
>>> 
>>> Has anyone found a replacement?
>>> 
>>> Geert Jan
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[Elecraft] The Ham Expo: What it got right

[Wayne Burdick]

Clearly there were major technical glitches with the Expo. I won't rehash the 
well-earned gripes.

There's a mitigating fact many of you were probably unaware of: The two most 
critical technical contributors to the effort were laid low by Covid-19 over 
the week leading up to it. Despite this, most of the site's functionality was 
ultimately restored. Many presentations went on, and many received rave 
reviews. Of course I feel for those whose presentations were not accessible or 
were otherwise compromised.

Some of our material was deferred as well. Yet there was one very significant 
highlight: The Lounge.

For me, Elecraft's Airmeet lounge rooms really *did* recreate much of the 
ambiance of our booth/hangout space at Dayton. I had dozens of wide-ranging 
conversations with experienced operators, newbies, and friends. It felt like 
like a homecoming on the year after an apocalypse. 

So, while the Expo didn't go smoothly -- something the organizers have already 
fallen on their swords for, multiple times -- I believe it will also be 
remembered for introducing many of us to the benefits of the multiple 
small-video-group paradigm. No doubt this will become a fixture of virtual 
hamfests. And in physical hamfests to come, it can facilitate the active 
participation of those who have no choice but to remain virtually.

Merging the Airmeet platform with Vfairs was risky, but visionary. As we say 
around my house when things go sideways: points for style. 

I suggest we all take a deep breath and give QSO Today a chance to work out the 
kinks. I'm sure that next time, with lessons learned, the experience will be 
fully beta-tested.

73,
Wayne
N6KR

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[Elecraft] Elecraft expo lounge up and running, despite the time change

[Wayne Burdick]

Yes, despite the loss of an hour of sleep (oh, sure..."Spring ahead," someone 
said), the Elecraft expo team is ready for drop-ins.

Yesterday's small-group discussions were very enjoyable. It did in fact feel 
like being at Dayton or Pacificon (etc.) at times -- something we all missed 
last year. I'd like to thank Eric Guth and the QSO Today team for making this 
format available. 

Today I'll be pulling up the K4 and KX-line 3D models again to answer your 
questions about design and functionality. Or we could talk about sunspots. Or 
home-brew of any sort.

Wayne
N6KR



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Elecraft...Full-Contact Ham Radio
www.elecraft.com

QSO Today Ham Expo gold sponsor; March 13-14, 2021
www.qsotodayhamexpo.com



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[Elecraft] N6KR now in K4 Technical room at Expo

[Wayne Burdick]

Getting a bit of a late start today, but then again, it's Saturday :)

Hope to see some of you in the Elecraft lounge today.

73,
Wayne
N6KR


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QSO Today Ham Expo gold sponsor; March 13-14, 2021
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[Elecraft] Interesting QSO

[Wayne Burdick]

I just finished a QSO with a QRP station in Bend, Oregon on 40 m that was 
memorable for a couple of reasons: First, that we managed it all despite awful 
atmospheric noise and poor propagation, and second, that it highlighted many 
the K4's tools for digging out weak signals. 

By the end of the QSO I was configured like this:

- diversity mode (wire antenna on main RX, vertical on sub)
- 100 Hz primary RX filter bandwidth
- 50 Hz APF (audio peaking filter)
- NB & NR on
- CW center pitch dialed down to 400 Hz

That final setting may have been optimum for my hearing range (we all lose 
higher-pitched response as we get older), but it also seemed to keep the week 
signal highlighted during static crashes. I'll be experimenting with this on DX 
signals.

73,
Wayne
N6KR


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[Elecraft] This weekend's Ham Expo features small-group discussion rooms (audio/video)

[Wayne Burdick]

Hi all,

One great feature of this weekend's QSO Today ham expo is the "Lounge" area. In 
Elecraft's lounge, you'll be able to choose from among several demo/technical 
discussion rooms, each with a product theme. Each room will have a maximum of 
just eight participants, and will be hosted by a member of our team. Eric, 
myself, and other design and support engineers will be staffing these sessions 
throughout the weekend. 

We expect this new format to recreate some of the more social aspects of 
in-person trade shows. And you won't need to mask-up, no matter where you live 
:)

In addition there will be many new presentations and other materials available 
at our virtual booth.

For more information, please visit:

https://www.qsotodayhamexpo.com/

73,
Wayne
N6KR


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Elecraft...Full-Contact Ham Radio
www.elecraft.com

QSO Today Ham Expo gold sponsor; March 13-14, 2021
www.qsotodayhamexpo.com



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Re: [Elecraft] T1 cable for the IC-705

[Wayne Burdick]

In progress. 

Wayne


elecraft.com

> On Feb 27, 2021, at 1:57 PM, William Combs via Elecraft 
>  wrote:
> 
> Is there any update on the T1 control cable for the IC-705?
> 
> Bill
> W8BC
> 
> 
> 
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[Elecraft] This morning on 40 meters: some DX, and over-the-horizon radar

[Wayne Burdick]

Two things were booming in this morning on my K4D: very loud over 
over-the-horizon radar (Chinese? Russian?), and Thailand (E29TGW). I'm pleased 
to report that the new K4 noise blanking algorithm completely suppressed the 
former, and that I worked the latter. 

The radar signals presented as an undulating "dragon" on the panadapter, 
blanketing about the lower 20 kHz of 40 meters. The panadapter's own noise 
blanker slayed it, though, knocking it into the atmospheric noise.

Next time this pops up I'll do a video.

73,
Wayne
N6KR

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Re: [Elecraft] Elecraft Support?

[Wayne Burdick]

Rich,

This should be working and we should be responding. We’re looking into it. 

Meanwhile: what’s your question? I’m always available :)

73,
Wayne
N6KR


elecraft.com

> On Feb 26, 2021, at 1:04 PM, Rich  wrote:
> 
> I used the on-line support form and have not heard a thing for weeks.
> 
> I would think they would remove the on-line support if it is not longer 
> available.
> 
> Rich
> 
> K3RWN
> 
>> On 2/26/2021 15:51 PM, Joe Subich, W4TV wrote:
>> 
>> Try k3supp...@elecraft.com
>> 
>> 73,
>> 
>>... Joe, W4TV
>> 
>> 
>>> On 2021-02-26 3:35 PM, Jay Radcliffe wrote:
>>> I have a K3 that I am having some trouble with (Low power output and
>>> 2m module no output). I have been emailing supp...@elecraft.com for
>>> weeks now and have gotten no response.
>>> 
>>> 1. Is Elecraft Support still in business? Maybe I can get a better
>>> contact there?
>>> 2. Can someone recommend another repair center?
>>> 
>>> Jay n8os
>>> 
>>> 
>>> Jay Radcliffe
>>> Twitter: @jradcliffe02
>>> E-Mail: jay.radcli...@gmail.com
>>> LinkedIn + Resume: http://www.linkedin.com/in/jradcliffe02
>> 
>> 
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[Elecraft] Another note on the K4's noise blanker

[Wayne Burdick]

I should have mentioned that the K4 also has a panadapter noise blanker that's 
very effective. It removes pulse noise that would otherwise cause the 
panadapter noise floor to rise, where it might obscure weak signals.

The display NB can be turned on automatically at the same time that the 
receiver blanker is turned on (AUTO setting), or turned on/off manually. Either 
way, the level settings for the display and receiver blankers are independent 
and per-band.

While recording the noise sample I just provided, I had the display NB on as 
well. It knocked the noise level on the panadapter down by about 20 dB. Weak 
signals could be clearly seen.

73,
Wayne
N6KR

> 

> On Mon, Feb 22, 2021 at 2:15 PM Wayne Burdick  wrote:
> A brief K4 audio sample can be downloaded using the link at the end of this 
> email. 
> 
> This recording hows how the new K4 noise blanker algorithm can reveal a 
> signal buried under loud noise. It also highlights the effectiveness of the 
> audio-peaking filter (APF) when listening to a very weak CW signal. 
> 
> This was recorded on 17 meters, CW mode, in a 1 kHz bandwidth. Both receivers 
> are turned on, tuned to the same frequency, and the recording is stereo. 
> There's a slight delay between main and sub RX audio as the settings change; 
> this is due to tapping A>B to copy the main RX NB and APF settings to the sub 
> RX.
> 
> Things to listen for (T in seconds):
> 
> T0:S-9 noise masking very weak carrier
> 
> T7:Noise blanker turned on so that only atmospheric noise remains; 
> carrier now barely audible
> 
> T14:   APF turned on, 30 Hz BW; carrier clearly audible
> 
> T23:   Carrier disappears, leaving band noise only
> 
> http://ftp.elecraft.com/K4/K4_audio_samples/K4%20NB%20demo%201.mp3
> 
> 73,
> Wayne
> N6KR



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[Elecraft] Noise blanker and APF test recording

[Wayne Burdick]

A brief K4 audio sample can be downloaded using the link at the end of this 
email. 

This recording hows how the new K4 noise blanker algorithm can reveal a signal 
buried under loud noise. It also highlights the effectiveness of the 
audio-peaking filter (APF) when listening to a very weak CW signal. 

This was recorded on 17 meters, CW mode, in a 1 kHz bandwidth. Both receivers 
are turned on, tuned to the same frequency, and the recording is stereo. 
There's a slight delay between main and sub RX audio as the settings change; 
this is due to tapping A>B to copy the main RX NB and APF settings to the sub 
RX.

Things to listen for (T in seconds):

T0:S-9 noise masking very weak carrier

T7:Noise blanker turned on so that only atmospheric noise remains; carrier 
now barely audible

T14:   APF turned on, 30 Hz BW; carrier clearly audible

T23:   Carrier disappears, leaving band noise only

http://ftp.elecraft.com/K4/K4_audio_samples/K4%20NB%20demo%201.mp3

73,
Wayne
N6KR


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Re: [Elecraft] K4 10MHz Reference level??

[Wayne Burdick]

We’re going to characterize this and add it to the spec. 

Wayne
N6KR


elecraft.com

> On Feb 21, 2021, at 6:42 PM, Mark Musick  wrote:
> 
> I would suspect it is the same as the K3/K3S.
> 
> Mark, WB9CIF
> 
> -Original Message-
> From: elecraft-boun...@mailman.qth.net  On 
> Behalf Of w4sc
> Sent: Saturday, February 20, 2021 08:15
> To: elecraft@mailman.qth.net
> Subject: [Elecraft] K4 10MHz Reference level??
> 
> Hello Elecraft K4 design team.  Looking for spec defining  requirements 10MHz 
> Reference level for K4.  Not in documentation??  
> 
> Ben W4SC
> 
> Sent from Mail for Windows 10
> 
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[Elecraft] Reminder -- Winter Field Day today starting 1900 Z

[Wayne Burdick]

Please support the frozen, huddle masses in their Winter Field Day quest this 
weekend. For full details:

https://www.winterfieldday.com/

That's just 1.5 hours from the time of this posting. Sorry for the late notice.

I'll be operating from the Santa Cruz mountains using the KX2 and an 
experimental antenna. 

73,
Wayne
N6KR


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Re: [Elecraft] Signals wild...signals caged

[Wayne Burdick]

Great hearing all these stories about CW (and rare bird sightings). Thanks, 
all. 

Wayne



elecraft.com

> On Jan 29, 2021, at 8:54 AM, David Olean  wrote:
> 
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Re: [Elecraft] Signals wild...signals caged

[Wayne Burdick]

> On Jan 28, 2021, at 10:52 AM, Macy monkeys  wrote:
> 
> While we are all narrowly focused on the K4 ...

Yes. Though we all must invent ways to stay sane in this time of lock-down and 
lock-up. 

I try to kick a hornet's nest every other Thursday around noon.

Wayne
N6KR



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Re: [Elecraft] Signals wild...signals caged

[Wayne Burdick]

> On Jan 28, 2021, at 10:43 AM, w...@jetbroadband.com wrote:
> 
> Wayne,
> 
> Me thinks you studied the liberal arts at one time before you took
> electronics engineering seriously. 
> 
> You have skillfully jumped, but tied together all your paragraphs in your
> little story . Well Done!
> 
> I ask now; Is there a great American Novelist inside you yearning to be set
> free, but hinder by the knowledge of the fact that there is a K4 project
> that must be finished?

Short answer: I wish :)  Long answer requires libations, etc., and is best 
taken off-list.

Wayne
N6KR


> 
> With sincere best regards,
> 
> Jerry, W1IE
> 
> 
> 
> 
> -Original Message-----
> From: elecraft-boun...@mailman.qth.net  On
> Behalf Of Wayne Burdick
> Sent: Thursday, January 28, 2021 13:11 PM
> To: Elecraft Reflector 
> Subject: [Elecraft] Signals wild...signals caged
> 
> My son is an avid birdwatcher. As his understudy, I've learned the names of
> the birds that hang out in our yard and gather at local wetlands.
> 
> On a recent walk we saw one of our favorites, an American kestrel, a small
> raptor that terrorizes lizards and mice in the foothills on both sides of
> the San Francisco Bay. The bird's coloration is a surprising mix of blue,
> brown, orange, yellow, and white, adorned with an array of black dots.
> 
> Finding a kestrel in the wild is like stumbling upon a rare gem, lying on
> the ground.
> 
> The bird reminded me that when I was a kid, I often hunted for gems of a
> different sort: DX. I was a novice, and in the early 1970s, novices were
> limited to working DX Of The First Kind. CW. 
> 
> Like brightly colored birds, each CW signal arriving from a distant land was
> unique. 
> 
> Several factors were involved. In those days most ops used bugs or straight
> keys, so each operator had an identifiable fist. Rigs were not as stable as
> they are now, yielding timbres with a motley mix of buzz, drift, and chirp.
> Add fading and noise to the mix, and you had no shortage of audible
> intrigue. 
> 
> In fact -- trust me on this one -- RST reports haven't always ended with a
> dependable "9." I once gave out an RST of 332. I'll never forget that poor
> soul's chaotic whoop, best described as a singular blend of yodel and kazoo.
> 
> Over time I became something of a CW pathologist, keenly aware of each
> station's affliction, including my own. These variations were useful. You
> could tell who you'd already worked. If you were a regular on the novice
> bands, you'd even get to know fellow travelers by their frequencies, since
> many, like me, were "rock-bound" -- slaves to a handful of crystals. VFOs
> were starting to make an appearance in novice gear...but see "chirp," above.
> 
> Now, in 2021, the chirp is gone. 
> 
> CW signals still have many distinguishing traits, though. These include
> speed, keying weight, the operator's affectations and favored prosigns, and
> direction-specific propagation anomalies. 
> 
> Here's where we stretch the central metaphor to just about max. 
> 
> If randomly occurring CW signals on our bands are creatures of the wild,
> then...are FT8 stations the occupants of an urban zoo? Don't get me wrong:
> It's a pleasant place, with free tram rides, open 24 hours a day. The
> diversity of species is unprecedented.
> 
> But imagine, on a given day, that you've sampled the zoo's exotic offerings,
> memorized the brochure, bought the t-shirt, and partaken of the sumptuous
> snack bar. What next?
> 
> Take a walk on the wild side. 
> 
> Yank the cord and jump off the tram at an unmarked stop. Hop the fence. Work
> your way down the unpaved trail from the upper mesa to the open savannah,
> then sit on the ten-foot wall and dangle your feet over the edge. 
> 
> Welcome to the ecosystem of beings who are free to roam. They may be
> camouflaged, blending into the background. And if you listen carefully,
> you'll hear a hundred variations on their timeless song...CQ.
> 
> Wayne
> N6KR
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
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> 

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[Elecraft] Signals wild...signals caged

[Wayne Burdick]

My son is an avid birdwatcher. As his understudy, I've learned the names of the 
birds that hang out in our yard and gather at local wetlands.

On a recent walk we saw one of our favorites, an American kestrel, a small 
raptor that terrorizes lizards and mice in the foothills on both sides of the 
San Francisco Bay. The bird's coloration is a surprising mix of blue, brown, 
orange, yellow, and white, adorned with an array of black dots.

Finding a kestrel in the wild is like stumbling upon a rare gem, lying on the 
ground.

The bird reminded me that when I was a kid, I often hunted for gems of a 
different sort: DX. I was a novice, and in the early 1970s, novices were 
limited to working DX Of The First Kind. CW. 

Like brightly colored birds, each CW signal arriving from a distant land was 
unique. 

Several factors were involved. In those days most ops used bugs or straight 
keys, so each operator had an identifiable fist. Rigs were not as stable as 
they are now, yielding timbres with a motley mix of buzz, drift, and chirp. Add 
fading and noise to the mix, and you had no shortage of audible intrigue. 

In fact -- trust me on this one -- RST reports haven't always ended with a 
dependable "9." I once gave out an RST of 332. I'll never forget that poor 
soul's chaotic whoop, best described as a singular blend of yodel and kazoo.

Over time I became something of a CW pathologist, keenly aware of each 
station's affliction, including my own. These variations were useful. You could 
tell who you'd already worked. If you were a regular on the novice bands, you'd 
even get to know fellow travelers by their frequencies, since many, like me, 
were "rock-bound" -- slaves to a handful of crystals. VFOs were starting to 
make an appearance in novice gear...but see "chirp," above.

Now, in 2021, the chirp is gone. 

CW signals still have many distinguishing traits, though. These include speed, 
keying weight, the operator's affectations and favored prosigns, and 
direction-specific propagation anomalies. 

Here's where we stretch the central metaphor to just about max. 

If randomly occurring CW signals on our bands are creatures of the wild, 
then...are FT8 stations the occupants of an urban zoo? Don't get me wrong: It's 
a pleasant place, with free tram rides, open 24 hours a day. The diversity of 
species is unprecedented.

But imagine, on a given day, that you've sampled the zoo's exotic offerings, 
memorized the brochure, bought the t-shirt, and partaken of the sumptuous snack 
bar. What next?

Take a walk on the wild side. 

Yank the cord and jump off the tram at an unmarked stop. Hop the fence. Work 
your way down the unpaved trail from the upper mesa to the open savannah, then 
sit on the ten-foot wall and dangle your feet over the edge. 

Welcome to the ecosystem of beings who are free to roam. They may be 
camouflaged, blending into the background. And if you listen carefully, you'll 
hear a hundred variations on their timeless song...CQ.

Wayne
N6KR










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Re: [Elecraft] Another Elecraft K4 question

[Wayne Burdick]

After a brief warmup, the K4's short-term reference lock deviation is 
approximately +/- 0.1 to 0.2 Hz at an operating frequency of 14 MHz. It scales 
linearly with frequency. This is roughly 5x tighter than the equivalent spec 
for the K3, so I'm guessing you wouldn't see it in a dopplergram. That said, we 
haven't tested it that way yet.

73,
Wayne
N6KR



> On Jan 27, 2021, at 12:16 PM, Dave Cole  wrote:
> 
> Does the K4 do temp compensation like the K3 does, in very small steps? If 
> so, is the step size the same as the K3?
> 
> I used to do dopplergrams using my old 756 PRO III, but with the K3 the 
> frequency corrections are in steps and mess up the dopplergrams...
> 
> 73, and thanks,
> Dave (NK7Z)
> https://www.nk7z.net
> ARRL Volunteer Examiner
> ARRL Technical Specialist, RFI
> ARRL Asst. Director, NW Division, Technical Resources
> 
> On 1/27/21 10:54 AM, Wayne Burdick wrote:
>>> On Jan 27, 2021, at 10:04 AM, Wayne Suite  wrote:
>>> 
>>> Does the K4 cover the 2200m and 630m ham bands, like the flex radios do?
>> The K4 receives on these bands. Transmit output can be taken from the XVTR 
>> OUT jack, and is about +10 dBm.
>> 73,
>> Wayne
>> N6KR
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Re: [Elecraft] Elecraft K4 question

[Wayne Burdick]

> On Jan 27, 2021, at 10:04 AM, Wayne Suite  wrote:
> 
> Does the K4 cover the 2200m and 630m ham bands, like the flex radios do?

The K4 receives on these bands. Transmit output can be taken from the XVTR OUT 
jack, and is about +10 dBm.

73,
Wayne
N6KR


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Re: [Elecraft] VK4

[Wayne Burdick]

Hi David,

The road from Windows to Mac OS is bumpy but there's a good map :)  iOS, on the 
other hand, will take longer, requiring design changes to conform to ergonomic 
and style guidelines, etc.

We'll be seeking development partners who were already considering taking this 
on.

73,
Wayne
N6KR


> On Jan 26, 2021, at 7:34 PM, David F. Reed  wrote:
> 
> Just read about the VK4; as a MAC user, any chance of a MAC OS and /or iOS 
> version coming out?
> 
> Here’s hoping!
> 
> 73 de W5SV - David F. Reed
> 
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Re: [Elecraft] [KX3] Why more power-efficient at or below 3 W?

[Wayne Burdick]

There are two windings on the PA output transformer: 1:1 and 1:4. We select one 
of these based on power level, battery voltage, and in some cases, operating 
mode.

In the 1:1 setting, the PA drain impedance is 50 ohms, making it more efficient 
for at power levels, reducing current drain.

In the 1:4 setting, the PA drain impedance is 12.5 ohms; the transformer steps 
it back up to 50 ohms for the low-pass filters. In this case it's more 
efficient at higher power levels, at the expense of higher current drain.

Wayne
N6KR



> On Jan 26, 2021, at 11:07 AM, Julia Tuttle  wrote:
> 
> The manual states in a couple spots that the KX3 can transmit more
> power-efficiently when output power is at or below 3 Watts.
> 
> Why is this? Is there an (additional?) amplifier stage that is bypassed at
> these lower power levels?
> 
> Thanks,
> 
> Julie
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Re: [Elecraft] Elecraft T1 and ICOM IC-705

[Wayne Burdick]

No changes needed to the T1. 

Wayne


elecraft.com

> On Jan 26, 2021, at 7:45 AM, David Patino  wrote:
> 
> Will there be in changes needed to the T1 itself? I have one on back order.
> If it'll need any changes I'd rather wait for it to be updated before I get
> it.
> 
> Also, any update on their status? Website still says ESD 1/25.
> 
> 73 - Dave - N9PBJ
> 
>> On Tue, Jan 26, 2021 at 9:28 AM Wayne Burdick  wrote:
>> 
>> Hi Björn,
>> 
>> The T1 ATU is ideal for use with low-power transceivers. While it can be
>> used manually in all cases, we offer an adapter for the FT-817 that tracks
>> that rig’s band changes, and we‘re testing a version for the IC-705. This
>> is the result of a collaboration, details of which will be provided in the
>> product announcement.
>> 
>> Our adapter is housed in a custom enclosure that measures only 2.5 x 1.2 x
>> 0.4”.
>> 
>> 73,
>> Wayne
>> N6KR
>> 
>> 
>> elecraft.com
>> 
>>>> On Jan 26, 2021, at 12:48 AM, Björn Ekelund  wrote:
>>> 
>>> Thinking entirely egoistic, I think Elecraft should manufacture this
>> great
>>> design as an option to the equally great T1.
>>> Elecraft T1 controller (T1con) with extremely low energy consumption!:
>>> アマチュア無銭家のブログ (cocolog-nifty.com)
>>> <https://amateur-radio.cocolog-nifty.com/blog/2021/01/post-7d1c42.html>
>>> 
>>> Björn SM7IUN
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Re: [Elecraft] Elecraft T1 and ICOM IC-705

[Wayne Burdick]

Hi Björn,

The T1 ATU is ideal for use with low-power transceivers. While it can be used 
manually in all cases, we offer an adapter for the FT-817 that tracks that 
rig’s band changes, and we‘re testing a version for the IC-705. This is the 
result of a collaboration, details of which will be provided in the product 
announcement. 

Our adapter is housed in a custom enclosure that measures only 2.5 x 1.2 x 
0.4”. 

73,
Wayne
N6KR


elecraft.com

> On Jan 26, 2021, at 12:48 AM, Björn Ekelund  wrote:
> 
> Thinking entirely egoistic, I think Elecraft should manufacture this great
> design as an option to the equally great T1.
> Elecraft T1 controller (T1con) with extremely low energy consumption!:
> アマチュア無銭家のブログ (cocolog-nifty.com)
> 
> 
> Björn SM7IUN
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Re: [Elecraft] K4 QSO With Wayne

[Wayne Burdick]

This is also how we generate our bug lists for the week :)

Wayne



elecraft.com

> On Jan 25, 2021, at 8:40 PM, Paul Van Dyke  wrote:
> 
>  Personally find it amusing that many people forget that they are both
> amateur radio operators 1st, besides the leaders of Elecraft. When they
> have free time (what is that) they enjoy getting on the air. And that
> alsobgoes for the other members of the staff
> 
> Paul KB9AVO
> 
>> On Mon, Jan 25, 2021, 11:26 PM Michael Walker  wrote:
>> 
>> Nice
>> 
>> I was just trading a few emails with him.
>> 
>> Mike va3mw
>> 
>> 
>>> On Mon, Jan 25, 2021 at 11:22 PM Tony <73gu...@gmail.com> wrote:
>>> 
>>> All:
>>> 
>>> Just had a CW QSO with Wayne N6KR on 40M with his K4. The rig sounds
>>> great on the air.
>>> 
>>> I didn't realize I was talking to the man who designed my FB K3S :  )
>>> 
>>> Thanks Wayne.
>>> 
>>> Tony -K2MO
>>> 
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Re: [Elecraft] Replacement Manuals

[Wayne Burdick]

Eventually they will. Thanks for reminding us.

Wayne
N6KR

> On Jan 25, 2021, at 9:34 AM, Louandzip via Elecraft 
>  wrote:
> 
> Minor nit, but the Elecraft PDFs don't have PDF outlines and linked page 
> numbers and references.  I find these very useful in the manuals for my other 
> rigs (and especially for my car with 900 pages between 3 manuals!).  A 
> section I'm reading might reference another page or section, clicking on it 
> takes me there, and ALT "back arrow" takes me back.  Very handy. 

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Re: [Elecraft] Different focus

[Wayne Burdick]

> On Jan 25, 2021, at 8:25 AM, Bill Frantz  wrote:
> 
> IEEE Binary Floating Point assumes (except in case of a very small, 
> de-normalized number), that the high order bit of the mantissa is a one. With 
> this assumption, it doesn't need to actually represent the one in memory. So, 
> it has 8 bits of exponent, 1 bit of sign, and 24 bits of mantissa crammed 
> into 32 bits. It should be able to handle the full precision of a 24 bit AtoD 
> converter.

If only we had 24 bits at RF. "Reasonable cost" for an ADC that can sample at 
120+ MHz gets you 16 bits at present.

Wayne
N6KR


> 
> 73 Bill AE6JV
> 
> On 1/25/21 at 8:15 AM, aa...@arrl.net (Bill Coleman) wrote:
> 
>> 
>>> On Jan 24, 2021, at 1:33 PM, Wayne Burdick  wrote:
>>> 
>>>> (Or did we have some other definition of “higher-performance”?)
>>> 
>>> Yes: More bits than 16, more monotonicity in the LSBs, general improvement 
>>> in SFDR, or lower
>> internal noise.
>>> 
>>> Adding more ADC bits does not require more DSP horsepower. The DSP is 32 
>>> bit floating point.
>> 
>> Well, that works up to 23-bits! (FP numbers have a 23-bit mantissa)
> 
> ---
> Bill Frantz| There's nothing so clear| Periwinkle
> (408)348-7900  | as a design you haven't | 150 Rivermead Rd #235
> www.pwpconsult.com | written down. - Dean Tribble| Peterborough, NH 03458
> 
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Re: [Elecraft] Different focus

[Wayne Burdick]

Yes. Plenty of margin for the foreseeable future :)

Wayne


> On Jan 25, 2021, at 5:15 AM, Bill Coleman  wrote:
> 
> 
> 
>> On Jan 24, 2021, at 1:33 PM, Wayne Burdick  wrote:
>> 
>>> (Or did we have some other definition of “higher-performance”?)
>> 
>> Yes: More bits than 16, more monotonicity in the LSBs, general improvement 
>> in SFDR, or lower internal noise.
>> 
>> Adding more ADC bits does not require more DSP horsepower. The DSP is 32 bit 
>> floating point.
> 
> Well, that works up to 23-bits! (FP numbers have a 23-bit mantissa)
> 
> Bill Coleman, AA4LR, PP-ASELMail: aa...@arrl.net
> Web: http://boringhamradiopart.blogspot.com
> Quote: "Not within a thousand years will man ever fly!"
>-- Wilbur Wright, 1901
> 

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Re: [Elecraft] Different focus

[Wayne Burdick]

Yes, this is in the works.

73,
Wayne
N6KR


> On Jan 24, 2021, at 5:32 PM, Bill Steffey NY9H  wrote:
> 
> I listened to Eric & Wayne proclamations , and did not hear either say that  
> the "subtractive " algorithms were going into the k4.  sooner or later.
> 
> I believe that that is what BHI uses 



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Re: [Elecraft] Virtual K4 application -- sneak preview

[Wayne Burdick]

> Tom  wrote:
> 
> Way cool screen saver Wayne !  Thank you!

My pleasure. Perhaps it would work as a stained-glass window, too :)

Wayne
N6KR


>> https://ftp.elecraft.com/K4/virtual_K4_app.jpg  
>> 


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[Elecraft] Virtual K4 application -- sneak preview

[Wayne Burdick]

Those of you who saw Eric's Friday presentation got a brief look at one part of 
our K4 remote control effort -- a 100% emulation of the K4 front panel called 
Virtual K4, or "VK4" for short. (Yes, it would even work on Fitzroy Island if 
you had an internet connection.) This is in addition to direct K4-to-K4 control.

Th VK4 application will eventually run on multiple platforms, including pads 
and laptops. It will support direct touch as well as mouse control, including 
the very useful mouse wheel for adjusting simulated rotary controls. We're 
fleshing out the various data streams including audio, panadapter, and CW 
keying. Of course third-party developers are free to create their own 
interfaces using the K4's extensive remote-control command set.

If you missed it, here's a directly link to the Virtual K4 concept drawing. You 
can also get to it on our K4 page, in the "K4 Updates" section.

https://ftp.elecraft.com/K4/virtual_K4_app.jpg

(The sharp-eyed will notice a few features in the app that don't appear on the 
K4 front panel itself.)

If you have comments or suggestions, feel free to send them to me directly or 
discuss on your favorite list. 

Note: In general we post everything of interest to the primary Elecraft 
reflector (this list). Postings to other lists may be more sporadic, so be sure 
to check here as well.

73,
Wayne
N6KR

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Re: [Elecraft] Different focus

[Wayne Burdick]

> On Jan 24, 2021, at 9:59 AM, Bill Coleman  wrote:
> 
> But wouldn’t a higher performance A/D converter also mean you’d have to bring 
> forth more DSP computing power? 
> 
> Is there that much spare DSP computing power in the K4? Could you double the 
> sample rate and still handle all the bits?
> 
> (Or did we have some other definition of “higher-performance”?)

Yes: More bits than 16, more monotonicity in the LSBs, general improvement in 
SFDR, or lower internal noise.

Adding more ADC bits does not require more DSP horsepower. The DSP is 32 bit 
floating point.

Wayne
N6KR



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Re: [Elecraft] Different focus

[Wayne Burdick]

The short answer is "yes." 

In the K4 it takes the form of distributed processing, including multiple 
high-speed FPGAs in the demodulation path, a new DSP that's twice as fast any 
we've used before, and virtually unlimited resources in our main processor. 

It's also a very modular radio. For example, if a higher-performance A-to-D 
converter becomes available in the future, we'll be able to offer an upgraded 
digital downconversion module.

73,
Wayne
N6KR


> On Jan 24, 2021, at 8:35 AM,   wrote:
> 
> For many years dynamic range and other receiver performance figures (see 
> Sherwood) and digital “features” like NB, NR, APF, Notch etc got a lot of 
> attention (which was good).
> 
> The transition from hardware to software opened a new world of possibilities.
> 
> But ….
> 
> Today, most of us are battling near-field man made noise instead of receiver 
> overload.
> 
> Reality tells us that this noise is not going to reduce the next decade or so.
> 
> Receivers will outperform competitors if they enable noise reduction and 
> improve S/N ratio.
> 
> This will be a combi of hardware (antenna’s and receivers) and smart software 
> solutions (algorithms etc.)
> 
> 
> 
> Just wondering if during the K4 design this “chance” was considered and if 
> so, how this was implemented ?
> 
> 
> 
> 73, Evert PA2KW
> 
> 
> 
> (waiting for the K4 kit)
> 
> 
> 
> 
> 
> 
> 
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Re: [Elecraft] REMOTE OPERATION

[Wayne Burdick]

We will be testing various mechanisms for attaching a keyer paddle to a remote 
client. Stay tuned

73,
Wayne
N6KR


> On Jan 23, 2021, at 9:17 AM, K5WA  wrote:
> 
> Paul,
> 
> 
> 
> I attended the "Demo" meeting last night and was told that Elecraft will
> release remoting software so you don't have to have a K4/0, HOWEVER, the
> further nuance to your question is probably "Can I use a paddle to send CW?"
> That was not directly discussed but I'll bet the answer is no.  I'm sure you
> could use a keyboard to send CW but I'm not sure that capability will be
> built into Elecraft's remoting software.  For my own interim remote setup
> (I'm waiting on the K4/0), I found a client server application (df3cb.com)
> that uses a WinKeyer to give you paddle CW.  It requires a WinKeyer on BOTH
> ends of your remote.  The idea is that you are paddling your local WinKeyer
> and it is talking to the remote WinKeyer which is connected to your remote
> rig.  That same remote capability is built into a WinKeyer
> (https://www.hamcrafters2.com/files/WKremote.pdf) and called WKremote by
> K1EL.  I didn't use that because I have a YCCC SO2R Box (which emulates a
> WinKeyer V1, I think) at my station so since I didn't have two WinKeyers, I
> tried the DF3CB idea and it worked!   You need to turn off the sidetone
> monitor on your rig and use the sidetone of your local WinKeyer but it works
> fine when you want to use a paddle for remote CW.
> 
> 
> 
> GL,
> 
> Bob K5WA


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Re: [Elecraft] REMOTE OPERATION

[Wayne Burdick]

Hi Paul,

You'll definitely be able to use the K4D on CW remotely. We're still working on 
some aspects of full remote control, and will post about our progress to the 
list periodically.

73,
Wayne
N6KR


> On Jan 21, 2021, at 7:24 PM, Paul Kobetz  wrote:
> 
> Hello Elecraft folks or anyone who is knowledgeable..
> I hv a K4D on order since 10/19 .my hope was assured by Elecraft at the
> Pacificon show when they demo'd the K4 with no other units involved for
> remote operation. I am disabled and vy old and was hoping to be able to
> operate my new K4D on CW remotely. If it is to be unlike that and require a
> K4/0 unit pse pse let me know asap!! If I need to order one then let me
> know that too.. The uncertainty for over a year really troubles me. My 1500
> and KX3 await their new brother..
> TU Sirs
> vy 73
> de K2HZO Paulk
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Re: [Elecraft] Absurd remarks about FCC and ARRL notices.

[Wayne Burdick]

My overworked business partner (WA6HHQ) is rightly trying to shut down this 
thread. We certainly don't want red and blue Elecraft forums. 

Before he does, I'd like to slip in a final comment.

The intent of my posting (yes, I started this) was to call attention to a 
highly unusual FCC announcement that was assumed to be of general interest. 
Similar postings were made to many other ham forums in the same time frame.

It's clear that the message has been received loud and clear. Interpretations 
are hereby officially left to the reader as a [private] exercise. 

Thanks,

Wayne
N6KR

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[Elecraft] Explained: K4/K4D receive performance vs. K3S

[Wayne Burdick]

> BRUCE WW8II  wrote:
> 
> The question is will the K4 or K4D be as good or better on receive than my 
> K3s with the
> 2.1kHz and the 200Hz filters.
> 
> Bruce WW8II


Bruce,

First, a bit of background would help since they're two different 
architectures. 

The K4/K4D are "pure" SDRs, meaning they're more agile in frequency, operating 
modes, modulation and demodulation, features in general, and extensibility. A 
lot of the flexibility of the design is in service of the built-in and external 
displays as well as remote control. The K4/K4D also have a lot more digital and 
RF I/O, satisfying the demand for a modern, integrated station. For example you 
can directly attach a keyboard, mouse, HDMI monitor, and flash storage drives 
or other USB devices.

By contrast, the K3S is a superhet, with emphasis primarily on receive close-in 
dynamic range performance rather than integration, agility, extensibility. The 
use of crystal filters is an advantage in raw performance, at the expense of 
passband flatness, available bandwidths, and group delay.

The K4HD will be a hybrid of the two: When the extra dynamic range is needed, 
you can turn on the HDR module, which is essentially two superhet 
downconverters, one for the main receiver and the other for the sub. But the 
HDR module is, in practice, rarely needed unless you have high-power 
transmitters in close proximity. Examples of this situation include 
multi-transmitter contest or DXpedition stations, those living in the shadow of 
a broadcast station, and those with very nearby ham neighbors.

With this context we can now talk about receiver performance.

- The K4/K4D are very similar to competing pure SDRs using 16 bit, wide-band 
A-to-D converters: signal handling is excellent by any measure, and there's 
plenty of headroom in all but the most heavily impacted RF environments.

- Compared to *any* pure SDR, the K3S (and a few other superhets) will have a 
few dB higher third-order intercept point. (Note that Sherwood's chart still 
shows the Flex 6700, a pure SDR, at 108 dB. He corrected this later to a much 
lower number -- see the '6700 footnotes in the far right column.)

- The K4HD will be in the same ballpark as the K3S, though we're still refining 
the design and our goal is for it to be higher. (The limitation with any 
superhet is the crystal filters, and we carefully control the quality of our 
suppliers.) 

73,
Wayne
N6KR



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Re: [Elecraft] Efficiency of MFJ remotely-tuned loop antennas

[Wayne Burdick]

Hi Alan,

72% sounds a bit high. Is this number based on loop size alone ("in theory")? 
Or are they taking conductor geometry and other losses into account?

Wayne
N6KR


> On Jan 18, 2021, at 2:05 PM, Alan Bloom  wrote:
> 
> MFJ makes a pair of small, remotely-tuned loop antennas, the MFJ-1786 that 
> covers 10-30 MHz and the MFJ-1788 that covers 7 to 21+ MHz.  As far as I can 
> tell, the two antennas are identical except for the size of the tuning 
> capacitor.  Each consists of a 3 foot (91 cm) diameter loop made of aluminum 
> tubing and a plastic housing that contains the tuning capacitor, motor, and 
> coupling loop.  No control cable is required since the control voltage is 
> sent from the control box in the shack to the motor in the antenna via the 
> coaxial cable.
> 
> Before I purchase one of these I wanted to get an idea of the efficiency of 
> such a small loop.  MFJ is silent on the subject so I did my own 
> calculations.  The calculations and results are on a 1-page document that I 
> uploaded to Dropbox and can be downloaded here:
> 
> https://www.dropbox.com/s/l8mv67cjrck2ssn/MFJ-1786-1788.pdf?dl=0
> 
> My calculations are based on the assumption that the efficiency of the MFJ 
> antennas is similar to the (no longer manufactured) AEA Isoloop (my reasoning 
> for that is in the document) and that AEA's specification of 72% efficiency 
> at 14 MHz is correct.  From that number I can calculate the efficiency and 
> gain on all the other bands.
> 
> If you don't want to download the document, here is a summary of the results:
> 
> Freq  Eff Gain with respect to a half-wave dipole
> MHz   dB  dBd
> 7.0   -7.3-7.7
> 10.1  -3.5-3.9
> 14.0  -1.4-1.8
> 18.068-0.6-1.0
> 21.0  -0.4-0.8
> 24.89 -0.2-0.6
> 28.0  -0.15   -0.5
> 
> I'd be interested in any comments people may have on the accuracy of
> my assumptions and calculations in the document.
> 
> Alan N1AL
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[Elecraft] K4 Built-In Operating Manual updated (rev. B6)

[Wayne Burdick]

As most of you know, the K4 has a built-in operating manual. You can browse by 
subject, search for text, or tap the "LAST CTRL" button to get information on 
the last knob, switch, or menu function used.

This manual is also available for review on-line. Here's the updated link:


https://ftp.elecraft.com/K4/Manuals%20Downloads/K4%20Built-In%20Operating%20Manual,%20rev%20B6/K4BuiltInOperatingManualrevB6.html

73,
Wayne
N6KR




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Re: [Elecraft] Waaay OT: A new kind of QRM to be aware of ... warning issued by FCC today

[Wayne Burdick]

Sure. Here's the link:

   https://mailchi.mp/elecraft/dec-2020-newsletter

Wayne
N6KR


> On Jan 18, 2021, at 9:13 AM, Ken B  wrote:
> 
> Wayne can you please reshare the news letter.  My old eyes appear to have 
> missed it 
> 
> Thanks Ken
> 
> Sent from Yahoo Mail on Android
> 
> On Mon, Jan 18, 2021 at 11:58 AM, Wayne Burdick
>  wrote:
> Either I post here or start a blog :)
> 
> (Seriously, as fun distractions go, I vote for our newsletter article about 
> using the K4 pedestrian mobile.)
> 
> Wayne
> N6KR
> 
> 
> > On Jan 18, 2021, at 8:47 AM, John Harper  wrote:
> > 
> > The conversation has now been shifted from "When will my K4 be shipped?"
> > Well played, Wayne ;-)
> > 
> > John AE5X
> > https://ae5x.blogspot.com



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Re: [Elecraft] Waaay OT: A new kind of QRM to be aware of ... warning issued by FCC today

[Wayne Burdick]

Either I post here or start a blog :)

(Seriously, as fun distractions go, I vote for our newsletter article about 
using the K4 pedestrian mobile.)

Wayne
N6KR


> On Jan 18, 2021, at 8:47 AM, John Harper  wrote:
> 
> The conversation has now been shifted from "When will my K4 be shipped?"
> Well played, Wayne ;-)
> 
> John AE5X
> https://ae5x.blogspot.com



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[Elecraft] K4 introduction manual link updated

[Wayne Burdick]

Our "Introduction to the Elecraft K4" manual link has been updated to revision 
B4. This rev includes preliminary specifications (page 40). Additional specs 
will be added in a subsequent edition.

Here's the direct link:


https://ftp.elecraft.com/K4/Manuals%20Downloads/Intro%20to%20the%20Elecraft%20K4,%20rev%20B4.pdf

This manual is landscape format, 8.5"H x 17"W, to allow for K4-sized drawings. 
It includes approximately 35 full-color illustrations of the front and rear 
panels. (A printed copy will be supplied with the radio.)

Comments and suggestions welcome.

73,
Wayne
N6KR



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Re: [Elecraft] K4 specs

[Wayne Burdick]

Hi Bruce,

The latest edition of the "Introduction to the Elecraft K4" manual includes 
preliminary specifications. Unfortunately the version that's at the manual link 
right now is an older one. That will be corrected by tomorrow, and you can 
download it.

I could send you the document directly, if you'd like. It's too big to post to 
a list. 

Check out page 40. Some specs are different from the K3; the radios have two 
entirely different architectures. 

The K4 adds a large color screen/panadapter, external monitor/keyboard/mouse 
support, ethernet connectivity, more digital I/O, more receive antenna 
selections, dual receive standard, and virtually unlimited future expansion 
capability.

73,
Wayne
N6KR


> On Jan 17, 2021, at 6:18 PM, BRUCE WW8II  wrote:
> 
> When is Elecraft going to publish some preliminary specs like sensitivity,
> and noise floor?? I really want a new radio (K4D) but I will not lay my
> cash out blindly. I love my fully loaded with every option,  K3s and I love
> my back-up K3 and my P3/VGA  and my KPA500 & KAT500 and my KPA1500. But I
> need real info.. I do not want to be like my good friends that recently
> bought from other radio companies that came out with a product that had all
> kinds of great reviews, then one of them brought his new radio over to my
> QTH so we could  compare to my K3s,  and then he went home a very unhappy
> camper.. I do not want to be unhappy when compared to my present set-up.
> At least tell me am I going to see an improvement over my present set-up??
> Things like sensitivity, noise floor,  noise blanker and noise reduction
> are biggies for me.  I am not a contester,  I am into weak signals in the
> daylight hours,  on 160 and 80 meters.
> OK  Just saying I want a new and better radio if there is one.. and maybe
> this subject has already been covered and I missed it.
> Yes I understand this virus thing has all of us a bit in the ANXIOUS mode.
> 
> I still like knobs on my radio!!
> 
> Stay safe
> Bruce
> WW8II
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Re: [Elecraft] Waaay OT: A new kind of QRM to be aware of ... warning issued by FCC today

[Wayne Burdick]

In case I’m misinterpreted, here: I’m just the messenger. This is a highly 
unusual FCC action that I figured would be of general interest. 

Someone pointed out privately that it could be construed as political — that 
was definitely not my intent. Misuse of the airwaves affects us all. 

Apologies to anyone who feels otherwise. 

73,
Wayne
N6KR


elecraft.com

> On Jan 17, 2021, at 1:07 PM, Wayne Burdick  wrote:
> 
> The FCC just posted this:
> 
>
> https://www.fcc.gov/document/amateur-personal-radio-users-reminded-not-use-radios-crimes



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[Elecraft] Waaay OT: A new kind of QRM to be aware of ... warning issued by FCC today

[Wayne Burdick]

The FCC just posted this:


https://www.fcc.gov/document/amateur-personal-radio-users-reminded-not-use-radios-crimes

I guess this isn't surprising, considering current events. But in case their 
motivation wasn't clear, see this interpretation:


https://www.cnn.com/2021/01/17/tech/fcc-radio-extremist-social-media-attack/index.html

Chances are VHF+ bands are the more likely vehicle for this form of 
self-expression. It might get lost in the already "interesting" QRM on 75 
meters.

73,
Wayne
N6KR

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Re: [Elecraft] tip of 3.5 mm plug remains in key jack

[Wayne Burdick]

If you break a plug tip off inside a connector on one of our radios, and can't 
get it out, send it in and we'll replace the connector. No charge for anything 
but shipping.

73,
Wayne
N6KR


> On Jan 17, 2021, at 11:51 AM, Josh Fiden  wrote:
> 
> 1/8” doesn’t exist. They’re all 3.5mm. 
> 
> Biggest problem I’ve seen in cheap import connectors is poor quality plating. 
> Both material & surface finish. 
> 
> 73
> Josh W6XU
> 
> Sent from my iPad
> 
>> On Jan 17, 2021, at 6:29 AM, David Ferrington, M0XDF  
>> wrote:
>> 
>> No one seams to have mentioned that there is a small difference in diameter 
>> between a 3.5mm plug and a 1/8” plug (which is 3.175mm).
>> However, I believe the socket on the K3 is a 3.5mm one, so that should not 
>> have caused this.
>> I’m sure someone like Don can confirm this.
>> 
>> 

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Re: [Elecraft] Firmware numbers

[Wayne Burdick]

Hi Jim,

There are no semantics in our firmware revisions. For example, 3.00 would just 
be an incremental improvement over 2.99.

73,
Wayne
N6KR


> On Jan 17, 2021, at 10:41 AM, Jim H via Elecraft  
> wrote:
> 
>  Hi,Several years ago Elecraft  explained the firmware numbers. Lets use 
> 2.86. The 2 is a major upgrade from 1. The point 86 is a minor or a bug fix. 
> If the point 86 jumps to point 89 it means multiple improvements/bug fixes. 
> Reading the latest fwnotes for an Elecraft product might explain the changes. 
> Hope this helps/explains firmware numbers. 73Jim HK7SSS 
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[Elecraft] K4 software note: Now full QSK at 50+ WPM

[Wayne Burdick]

We just completed a planned update to the T/R sequencing that resulted in a 
major speed-up of QSK. You can how hear between CW elements at over 50 WPM. 

All you need to do is turn on QSK mode (a dedicated switch function). When QSK 
is off, the CW delay knob setting applies.

73,
Wayne
N6KR

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Re: [Elecraft] K4 Roadtrip. Winter field day

[Wayne Burdick]

Yes. Not sure how challenging the weather will be (it’s 72 F today), but I’ll 
be taking the K4 to the nearest high-altitude picnic table. 

Wayne
N6KR


elecraft.com

> On Jan 16, 2021, at 12:17 PM, JP Douglas  wrote:
> 
> Hi Greg,
> 
> We were talking about doing the same, three of us activated Fort Edgecomb 
> here in ME last Sunday w/good success and are talking about POTA FD combo 
> using our club call K1LX.
> 73 de Jose Douglas KB1TCD Bristol, ME.
> 
>> On Jan 16, 2021, at 2:47 PM, Greg Herman  wrote:
>> 
>> Winter field day is just around the corner and just curious if anyone is
>> going to deploy a K4 on field day.
>> 
>> Unless we have a lot of major snow I am hoping to talk the wife into going
>> camping that weekend and set up field day in our little Aliner camper.
>> KX3-PX3-KXPA100, 50 AH Battleborn battery
>> 
>> I am planning on something slightly different
>> “CQ FIELD DAY- Parks on the Air” “CQ FIELD DAY- Parks on the Air”
>> This is KC9NRO standing by
>> 
>> I know the good folks at  Elecraft have been working hard, especially
>> dealing with the lockdown mania, might be a good excuse for a road trip to
>> a neighboring state with a K4
>> 
>> Or perhaps hide somewhere in 29 Palms LOL
>> 
>> 73 my friends
>> Greg- KC9NRO
>> 
>> 29 Palms- The worlds largest ashtray and my butt was stuck there!!!
>> 
>> 
>> -- 
>> Have a Great day!
>> Greg
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Re: [Elecraft] How to download firmware into K4

[Wayne Burdick]

elecraft.com

> On Jan 12, 2021, at 2:18 PM, Joseph Trombino, Jr  wrote:
> 
> Howdy Gang.
> 
> Just went through a preliminary introduction to the K4 doc and didn’t see 
> anything abut how to load new firmware into the K4.
> 
> Is this where the Ethernet port comes into play?

Yes. Updates are initiated easily from the K4 front panel. 

63,
Wayne
N6JR


> 
> Any info appreciated.
> 
> Take care, stay healthy and enjoy.
> 
>73, Joe W2KJ
>I QRP, therefore I am
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Re: [Elecraft] Testing

[Wayne Burdick]

Hi David,

Works fine here. 

I've been working the NA CW contest. 40 m in particular is hopping. Gave me a 
chance to test a lot of K4 software refinements we've been working on.

73,
Wayne
N6KR


> On Jan 9, 2021, at 4:27 PM, David Herring  wrote:
> 
> Just testing...I seem to have not received anything from this list since 
> yesterday morning.  Sorry for any inconvenience.
> 
> 73,
> David - N5DCH


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Re: [Elecraft] APF on CW

[Wayne Burdick]

> The APF function on my KX3 makes the signal jump out of the noise
> 
> Hope the feature remains in the K4 line

It does. There are now two bandwidth settings, too. 

Wayne

> 
> Regards, Jan K1ND  ~ stay-safe ~
> 
> 
> -- 
> This email has been checked for viruses by AVG.
> https://www.avg.com
> 
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Re: [Elecraft] K4 Kit and CE

[Wayne Burdick]

Hi Bill,

The K4 and K4D both provide up to 5 receive antenna sources. The difference is 
that the K4D has an additional ADC so the sub receiver can be on a different 
antenna from the main receiver.

73,
Wayne
N6KR



> On Jan 5, 2021, at 2:12 PM, Nr4c  wrote:
> 
> The superhet is the K4HD, not the K4D.  “D” only adds a second AtoD and an 
> antenna port. It will be available when radios ship. 
> 
> Sent from my iPhone
> ...nr4c. bill
> 
> 
>> On Jan 5, 2021, at 2:43 PM, Doug Turnbull  wrote:
>> 
>> Dear OMs and YLs,
>> 
>> Someone on this forum stated that if sold in kit form that the K4 did
>> not need CE approval for sale in the EU. I am not sure this is true but
>> hope so and of course then hope that the kit is coming out sooner rather
>> than later. I have a deposit down for the second group of shipments and
>> this would mean that I might actually see the K4 sooner.
>> 
>> 
>> 
>> Once the K4D with superhet frontend is available, the new front end
>> will be ordered plus a second K4D.I already have homes for my two K3
>> radios.Probably will also want another KPA 1500.
>> 
>> 
>> 
>>  So any word on CE approval process, whether it is required for kits
>> sold into the EU and the availability of the kit version of the K4 is
>> anxiously awaited.
>> 
>> 
>> 
>> As and aside it would be nice if the next version of the KPA 1500
>> could be run efficiently at 400W.Contest power is generally 1500 Watts
>> in EI but normal output power is limited to 400W. An Acom 2000A also in
>> the shack may be the amp to use when operating under normal conditions.
>> Having said this, the KPA is a beautiful amp and it is for that reason a
>> second one is considered.
>> 
>> 
>> 
>>Yes perhaps this is greed but at 76 there are not that many more
>> sunspot cycles in store for me. I started like most of you with a
>> surplus RGB II (forerunner of the HQ120) bought from summer job and baby
>> siting.The first rig was an old borrowed TCS surplus radio before
>> building a two 6146 rig from a QST article.What a great hobby radio is.
>> 
>> 
>> 
>>  73 Doug EI2CN
>> 
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Re: [Elecraft] [Elecraft-K4] Delivery of the K4

[Wayne Burdick]

No kidding. Two of our most senior consulting engineers are recovering 
(fortunately) from Covid. (And as for living hell, the fires destroyed the 
homes of two other Elecraft engineers. They're both hoping to rebuild, though 
it's an arduous process.)

Wayne
"stayin' alive"...
N6KR


> On Jan 5, 2021, at 3:52 PM, Paul Van Dyke  wrote:
> 
> Considering that California is now the most infectious state in the United 
> States for Covid-19, I suspect the Eric and Wayne have their hands full just 
> being alive, and making sure their, friends, family, employees are staying 
> alive  they have been through going through living h*** for over a year.. 
> 
> Paul - KB9AVO 
> _._,_._,_
> Groups.io Links:
> You receive all messages sent to this group.
> 
> View/Reply Online (#1122) | Reply To Group | Reply To Sender | Mute This 
> Topic | New Topic
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Re: [Elecraft] K4 Question

[Wayne Burdick]

I meant to say that 4K is the maximum resolution supported. Standard lower 
resolutions are also supported. 

Wayne
N6KR


elecraft.com

> On Jan 4, 2021, at 7:12 PM, Wayne Burdick  wrote:
> 
> On Jan 4, 2021, at 6:41 PM, Ken via Elecraft  
> wrote:
>> Will the K4 Band Scope support line only (eg. no fill) wave forms, like the 
>> P3 ?
> 
> Yes. There are multiple selections for spectrum fill including OFF. 
> 
> 
>> What external monitor resolutions are supported by the K4 ?
> 
> 4K (3840 x 2160)
> 
> 
>> 
>> W8KEN - Ken
>> 
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Re: [Elecraft] K4 Question

[Wayne Burdick]

On Jan 4, 2021, at 6:41 PM, Ken via Elecraft  wrote:
> Will the K4 Band Scope support line only (eg. no fill) wave forms, like the 
> P3 ?

Yes. There are multiple selections for spectrum fill including OFF. 


> What external monitor resolutions are supported by the K4 ?

4K (3840 x 2160)


> 
> W8KEN - Ken
> 
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Re: [Elecraft] Does a K4 need an external sound card for FT8?

[Wayne Burdick]

Hi Dennis,

The sound card is built into the K4 (stereo line out for RX, line in for TX). 
Adjustment is simple. There is no advantage whatsoever to using an external 
sound card.

The K4 also has analog line in/out for backwards compatibility, and supports 
digital audio streaming over Ethernet as well.

73,
Wayne
N6KR


> On Jan 4, 2021, at 5:11 PM, Dennis Dinga  wrote:
> 
> This question keeps coming up but, but the answers are either incomplete or 
> confusing.  Courtney KD6X asked it again on Jan 3 and has not received an 
> answer.
> 
> Here's the way I'd like to ask it:  I use a West Mountain RIGblaster 
> advantage instead of the sound card in my computer.  Why?  So that I have the 
> convenience of adjusting TX and RX levels with physical knobs instead of 
> using sliders on a monitor.  So how do you set levels with the K4?  Does it 
> require fiddling with menus and going through several steps?  And like 
> Courtney asked, is there anything else to gained by using an external 24 bit 
> card?
> 
> -Dennis N6DD
> 
> ++
> 
> Here is the way that Courtney KD6X put it:
> 
> "Any value in using a Microkeyer III with a K3S or K4D?
> 
> I have a K3... the best radio I've ever owed in my 50+ year ham life.  I'm 
> currently using a US Interface Navigator with it for digital modes.  This is 
> now sold as the Time Wave Navigator and has worked really well for me for 
> many years.
> 
> My understanding is that the K3S and now the incoming K4's have sound cards 
> built-in via the USB port.  So perhaps I won't need the Navigator anymore 
> when my K4 eventually arrives.  But my question is whether there is still 
> something to be gained using a newer transceiver interface with the K3S or 
> K4?  I've been looking at the Microkeyer III with its 24 bit audio 
> processing.  Does anyone have any hands-on experience with the Microkeyer III 
> with Elecraft radios?  I'm particularly interested if it has a lower noise 
> floor or other features that might not be found in the stock K3S or K4.
> 
> Thanks for any input or feedback!
> 
>  -- Courtney  KD6X"
> 
> 
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[Elecraft] Firmware rev. 2.95 available for KX3; supports device for audio SWR reporting

[Wayne Burdick]

KX3 version 2.95 firmware is now available. It supports the "SW;" remote 
control command (read SWR value during transmit).

One reason we added support for this command is that Joe, VE3VXO, has built a 
hardware module that polls the rig (using the SW; command) and outputs a 
"recognizable audio pattern proportional to the current VSWR." Feel free to 
contact Joe if you have questions about this. At least one blind KX3 operator 
is already using one.

73,
Wayne
N6KR



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Re: [Elecraft] K4 Status Update

[Wayne Burdick]

No. Gatesgarth is a 6-month release, while Dunfell has Long Term Support.

Wayne
N6KR


> On Dec 25, 2020, at 6:11 PM, VE3GNO Daniel  wrote:
> 
> Hi Wayne
> 
> Any plans to upgrade to Gatesgarth? 
> 
> 73 de ve3gno Daniel
> 
> Sent from Yahoo Mail on Android
> 
> On Tue, Dec 22, 2020 at 14:40, Wayne Burdick
>  wrote:
> Dunfell.
> 
> Wayne
> N6KR
> 
> 
> > On Dec 22, 2020, at 1:14 AM, Charlie Delta via Elecraft 
> >  wrote:
> > 
> > Hi Eric
> > What distribution of embedded Linux is used in the K4, I am curious?
> > 73CraigVK3OD
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Re: [Elecraft] K3S Birdy on 28MHz

[Wayne Burdick]

Hi Conrad,

"SIG RMV" is a function we created that shifts both the BFO and VFO by the same 
small amount in order to shift a spur out of the passband. 

The reason this is effective for many spurs is because they're the product of 
harmonics of the signal sources, not the fundamentals. For example, you may 
hear a spur that results from mixing of the 3rd harmonic of the VFO beating 
against the 9th harmonic of the BFO (any combination is possible). That's the 
nature of high-level mixers in superhet transceivers. 

SIG RMV shifts the VFO and BFO by the same amount *at their fundamentals*, but 
the spurs end up shifted by a multiple of this amount. Using the previous 
example, a 100 Hz shift at the fundamental might shift the VFO 300 Hz and the 
BFO 900 Hz. (Often the multiples are much higher -- I've seen them up to 21.) 
Doing this often moves the spur out of the passband, while having an 
insignificant effect on the filter center frequency (these are fixed because of 
the crystal filters).

You can create SIG RMV entries separately for both the main and sub receivers 
on the K3/K3S.

73,
Wayne
N6KR



> On Dec 26, 2020, at 3:44 AM, Conrad PA5Y  wrote:
> 
> Thanks to G4ZTR I found "SIG RMV" in the Config Menu. It worked a treat. What 
> exactly does this do. I noticed that the passband changed but I was able to 
> restore it by changing the centre frequency. It worked great!
> 
> 
> 
> Many thanks John.
> 
> 
> 
> 73
> 
> 
> 
> Conrad PA5Y
> 
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Re: [Elecraft] K4: how does the Power Out adjustment + tracking function?

[Wayne Burdick]

The K4 works the same way. 

73,
Wayne
N6KR


elecraft.com

> On Dec 23, 2020, at 3:58 AM, Douglas Zwiebel  wrote:
> 
> Is it like the K3 where you can adjust it in 1 watt steps down to (say) 10
> watts and then it adjusts in 0.1 watt steps?
> 
> de Doug KR2Q
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Re: [Elecraft] K4 Status Update

[Wayne Burdick]

Dunfell.

Wayne
N6KR


> On Dec 22, 2020, at 1:14 AM, Charlie Delta via Elecraft 
>  wrote:
> 
> Hi Eric
> What distribution of embedded Linux is used in the K4, I am curious?
> 73CraigVK3OD
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Re: [Elecraft] K4 CAT and audio over ethernet.

[Wayne Burdick]

> On Dec 21, 2020, at 1:06 PM,  
>  wrote:
> 
> Will the K4 CAT interface be available over ethernet. If so, will the K4 act 
> as a TCP server?

Yes.


> Will TX and RX audio be available over ethernet?

Yes.

73,
Wayne
N6KR


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Re: [Elecraft] K4 / External Transverters

[Wayne Burdick]

> On Dec 19, 2020, at 12:23 PM, w2bvh  wrote:
> 
> How many external transverter setups does the K4 accommodate?

12.


> Are there hardware band (or band segment) decodes available for them?

Yes, via the BAND0..BAND3 outputs of the ACC jack.

73,
Wayne
N6KR


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Re: [Elecraft] K4 Panadapter Notch Display

[Wayne Burdick]

Certainly a good idea, added to the list for consideration.

Thanks,
Wayne


> On Dec 15, 2020, at 10:31 AM, AL7CR  wrote:
> 
> Will the K4 panadapter be able to show the position of the manual notch?  It 
> could be displayed as a different color background similar to how the receive 
> filter is shown on the P3.  It would be a very useful feature.
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Re: [Elecraft] K4 Radio Update

[Wayne Burdick]

This is not correct.

For technical reasons, we've been using a somewhat outdated Kernel during the 
past year's development. (This simplified some logistics for the team, while 
having virtually no impact on K4 users.) All current users are getting updated 
along with our development team, and it was completely painless. It'll all be 
history by the end of next week. A one-time reckoning.

Now that we've gotten this task out of the way, all future upgrades should go 
very smoothly. In the vast majority of cases only the application code will be 
updated.

And don't worry: as a user of the K4, you won't have to even think about linux 
OS issues, linux commands, and other arch-nerdly stuff. Updates are essentially 
one-click (maybe two). 

It's a radio, not a computer

73,
Wayne
N6KR



> On Dec 6, 2020, at 3:51 PM, Dave Cole  wrote:
> 
> Hi Paul,
> 
> I want to check my understanding of what you just said:
> 
> For whatever reason, a kernel update not triggered by Elecraft, triggered a 
> shipment stoppage of the K4s?  Is that correct?
> 
> 73, and thanks,
> Dave (NK7Z)
> https://www.nk7z.net
> ARRL Volunteer Examiner
> ARRL Technical Specialist, RFI
> ARRL Asst. Director, NW Division, Technical Resources
> 
> On 12/6/20 3:23 PM, Paul Van Dyke wrote:
>> Greetings...
>> This to answer more than a few emails I have gotten.
>> I just got off the phone with Eric WA6HHQ, and he explained that they made
>> a few tweeks in some of the features that are in K4. They DID NOT do a
>> major rewrite... But at the same time, there was an upgrade in the Linux
>> operating system, and Eric, Wayne, and many engineers, field testers are
>> beating up the code to make sure the improvements do not have adverse
>> affects or hidden flaws before they resume shipping. I believe there will
>> be a note, to all, in a week or so, giving a more detailed explanation.
>> Keep Well
>> Paul Van Dyke - KB9AVO
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Re: [Elecraft] K4D questions - diversity, HDMI, Ref In

[Wayne Burdick]

> On Dec 2, 2020, at 9:23 AM, William Hein  wrote:
> 
> Back to the phase locked receivers in the K4D. Does the K4HD retain this 
> feature? I am wondering if the Superhet circuitry would mess up the phase 
> coherence?


The HDR (superhet) module is phase-locked at the IF. At the LO injection it's 
frequency-locked to a small fraction of a Hz. This results in very slow 
(mutliple-second) phase precessing when using diversity mode, which in our 
experience has no impact, given that atmospheric phase changes occur much more 
rapidly.


> ...is there a way to bypass the K4HD Superhet circuits when not (for example) 
> operating in a HF contest M2 or MM?

Yes. There will be a top-level control for this purpose.

73,
Wayne
N6KR


> 
> 73
> Bill AA7xT
> 
> 
> Bill Hein
> Sound Business Strategies, LLC
> m 970-628-5120
> b...@soundbusiness.us
> 
> 
> 
> The information contained in this transmission may contain privileged and 
> confidential information, including patient information protected by federal 
> and state privacy laws. It is intended only for the use of the person(s) 
> named above. If you are not the intended recipient, you are hereby notified 
> that any review, dissemination, distribution, or duplication of this 
> communication is strictly prohibited. If you are not the intended recipient, 
> please contact the sender by reply email and destroy all copies of the 
> original message.
> 
> Please help reduce paper and ink usage. Print only if necessary.
> 
> 
> On Sat, Nov 21, 2020 at 5:53 PM Wayne Burdick  wrote:
> Then yes, this should work. I had assumed it was producing a 1-Hz square 
> wave. 
> 
> Wayne
> 
> 
> elecraft.com
> 
>> On Nov 21, 2020, at 3:20 PM, William Hein  wrote:
>> 
>> 
>> Hi, Wayne!
>> 
>> I'm very happy about the phase sync between the two rxs, that will be a lot 
>> of fun!
>> 
>> FYI - The Bodnar GPS unit outputs a programmable output including 10 MHz at 
>> various levels:
>> 
>> Low-jitter GPS-locked precision frequency reference
>> 450 Hz to 800 MHz output
>> This device outputs two synchronised low-jitter reference clocks locked to 
>> GPS signal.
>> Long term stability of output signal is defined by high accuracy of GPS 
>> Caesium references and theoretically approaches 1x10-12.
>> Short term signal quality is defined by internal TCXO clock source providing 
>> high-quality, low phase noise clock signal with sub-picosecond RMS jitter.
>> Digital PLL allows main output reference frequency to have almost any value 
>> between 450Hz and 800MHz.
>> The second output frequency depends on the first output due to a common 
>> internal clock, if you need individual flexibility, multiple mini GPS units 
>> may be a better choice. If both outputs have the same frequency their 
>> relative phase shift can be adjusted. This can be used, for example, to 
>> generate two signals with 90° phase shift for use in I/Q mixer.
>> Both output signals square wave at 3.3V CMOS levels with 50 Ohms 
>> characteristic impedance. Their output drive levels can be adjusted and 
>> outputs can be enabled and disabled independently.
>> Output power level (measured at 10MHz, fundamental power channel):
>> +13.3dBm, drive setting 32mA
>> +12.7dBm, drive setting 24mA
>> +11.4dBm, drive setting 16mA
>> 
>> Bill Hein
>> Sound Business Strategies, LLC
>> m 970-628-5120
>> b...@soundbusiness.us
>> 
>> 
>> 
>> The information contained in this transmission may contain privileged and 
>> confidential information, including patient information protected by federal 
>> and state privacy laws. It is intended only for the use of the person(s) 
>> named above. If you are not the intended recipient, you are hereby notified 
>> that any review, dissemination, distribution, or duplication of this 
>> communication is strictly prohibited. If you are not the intended recipient, 
>> please contact the sender by reply email and destroy all copies of the 
>> original message.
>> 
>> Please help reduce paper and ink usage. Print only if necessary.
>> 
>> 
>> On Sat, Nov 21, 2020 at 2:46 PM Wayne Burdick  wrote:
>> 
>> > On Nov 21, 2020, at 1:38 PM, William Hein  wrote:
>> > 
>> > The K4D looks like an amazing radio! I am interested in diversity rx,
>> > primarily on 50 MHz. A few questions:
>> > 
>> > (1) Are the two K4D receivers phase coherent (in sync)?
>> 
>> Yes.
>> 
>> 
>> > 
>> > (2) What is the resolution of the HDMI video output?
>> 
>> Up to 4K.
>> 
>> 
>> > 
>> > (3) Will the Ref In work with something like the Bodnar GPS reference 
>> > clock?
>> 
>> REF IN requires a 10 MHz signal, not a GPS pulse.
>> 
>> 
>> 73,
>> Wayne
>> N6KR
>> 

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Re: [Elecraft] [K3] Elecraft Support?

[Wayne Burdick]

John,

We're supporting the K3 100%, as always. Apologies for the delay, which appears 
to have been caused by Thanksgiving.

I'm sure someone will be getting back to you soon.

73,
Wayne
N6KR


> On Dec 1, 2020, at 10:53 AM, John Reilly  wrote:
> 
> I have a problem with my K3s 100w PA: No power above 12w, and receive signals 
> are down 20 dB. I sent an email to "K3support" a week ago and haven't 
> received a reply. Is that email address still valid? So, I resent the email 
> to "support" yesterday -- no response. Has Elecraft stopped supporting the K3?
> 
> To make matters worst, I downloaded the K3s Schematics, and the KPA3A 
> schematics (Rev C4?) do not match my Rev E PCB. This sure make 
> troubleshooting a challenge.
> 
> I have a fairly large investment in Elecraft equipment, in large part due to 
> their past excellent support. Do I need to rethink this?
>   - John, N0TA
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[Elecraft] CW bands hopping up through 10 m...

[Wayne Burdick]

...due to both CQ WW and sunspots. Hearing lots of DX as well as stateside SOTA 
operators at the same time on 10 m. 20 and 15 m are blazing.

Enjoy!

Wayne
N6KR

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Re: [Elecraft] MARS Mod be available for K4?

[Wayne Burdick]

Yes. 

Wayne
N6KR


elecraft.com

> On Nov 27, 2020, at 8:43 AM, Bill Carter via Elecraft 
>  wrote:
> 
> I would like to use it for SHARES.
> 
> Bill, W7WEC
> 
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Re: [Elecraft] Sunspots!?!?

[Wayne Burdick]

> Douglas Hagerman wrote:
> 
> If, by some miracle, the sunspot count were to eventually jump up to a really 
> high level, as was the case in around 2002, or even better in 1959, how would 
> the various Elecraft receivers work? I’m specifically interested in the K1 
> and K2, but in general, is there a realistic problem with overloading of the 
> front end?

No.

> Or, assuming that you can hear signals from all over, will the selectivity, 
> etc., be sufficient?

Yes.

Our radios were all designed with that magic moment in mind :)

73,
Wayne
N6KR



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Re: [Elecraft] Firmware development

[Wayne Burdick]

Hi Tim,

Like any product development company, we have to strike a balance between 
creating new products and enhancing old ones. That said, we've provided 
literally hundreds of new K3/K3S/P3/KX2/KX3/PX3/KPA500/KPA1500 firmware 
revisions over the past 10 years, for both MCU and DSP code. Many of those 
releases stemmed directly from customer input. 

The K4 is a different beast entirely. It has essentially unlimited code space, 
and a high degree of modularity to facilitate future hardware. 

The team is still small, but we now have a much bigger playground :)

73,
Wayne
N6KR


> Hello, all,
> 
> I'm a brand new and generally satisfied Elecraft KX2 user.
> 
> I'm just wondering what sorts of features are in the oven for future
> versions of firmware. 


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Re: [Elecraft] K4D questions - diversity, HDMI, Ref In

[Wayne Burdick]

Then yes, this should work. I had assumed it was producing a 1-Hz square wave. 

Wayne


elecraft.com

> On Nov 21, 2020, at 3:20 PM, William Hein  wrote:
> 
> 
> Hi, Wayne!
> 
> I'm very happy about the phase sync between the two rxs, that will be a lot 
> of fun!
> 
> FYI - The Bodnar GPS unit outputs a programmable output including 10 MHz at 
> various levels:
> 
> Low-jitter GPS-locked precision frequency reference
> 450 Hz to 800 MHz output
> This device outputs two synchronised low-jitter reference clocks locked to 
> GPS signal.
> Long term stability of output signal is defined by high accuracy of GPS 
> Caesium references and theoretically approaches 1x10-12.
> Short term signal quality is defined by internal TCXO clock source providing 
> high-quality, low phase noise clock signal with sub-picosecond RMS jitter.
> Digital PLL allows main output reference frequency to have almost any value 
> between 450Hz and 800MHz.
> The second output frequency depends on the first output due to a common 
> internal clock, if you need individual flexibility, multiple mini GPS units 
> may be a better choice. If both outputs have the same frequency their 
> relative phase shift can be adjusted. This can be used, for example, to 
> generate two signals with 90° phase shift for use in I/Q mixer.
> Both output signals square wave at 3.3V CMOS levels with 50 Ohms 
> characteristic impedance. Their output drive levels can be adjusted and 
> outputs can be enabled and disabled independently.
> Output power level (measured at 10MHz, fundamental power channel):
> +13.3dBm, drive setting 32mA
> +12.7dBm, drive setting 24mA
> +11.4dBm, drive setting 16mA
> 
> Bill Hein
> Sound Business Strategies, LLC
> m 970-628-5120
> b...@soundbusiness.us
> 
> 
> 
> The information contained in this transmission may contain privileged and 
> confidential information, including patient information protected by federal 
> and state privacy laws. It is intended only for the use of the person(s) 
> named above. If you are not the intended recipient, you are hereby notified 
> that any review, dissemination, distribution, or duplication of this 
> communication is strictly prohibited. If you are not the intended recipient, 
> please contact the sender by reply email and destroy all copies of the 
> original message.
> 
> Please help reduce paper and ink usage. Print only if necessary.
> 
> 
>> On Sat, Nov 21, 2020 at 2:46 PM Wayne Burdick  wrote:
>> 
>> > On Nov 21, 2020, at 1:38 PM, William Hein  wrote:
>> > 
>> > The K4D looks like an amazing radio! I am interested in diversity rx,
>> > primarily on 50 MHz. A few questions:
>> > 
>> > (1) Are the two K4D receivers phase coherent (in sync)?
>> 
>> Yes.
>> 
>> 
>> > 
>> > (2) What is the resolution of the HDMI video output?
>> 
>> Up to 4K.
>> 
>> 
>> > 
>> > (3) Will the Ref In work with something like the Bodnar GPS reference 
>> > clock?
>> 
>> REF IN requires a 10 MHz signal, not a GPS pulse.
>> 
>> 
>> 73,
>> Wayne
>> N6KR
>> 
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Re: [Elecraft] K4D questions - diversity, HDMI, Ref In

[Wayne Burdick]

> On Nov 21, 2020, at 1:38 PM, William Hein  wrote:
> 
> The K4D looks like an amazing radio! I am interested in diversity rx,
> primarily on 50 MHz. A few questions:
> 
> (1) Are the two K4D receivers phase coherent (in sync)?

Yes.


> 
> (2) What is the resolution of the HDMI video output?

Up to 4K.


> 
> (3) Will the Ref In work with something like the Bodnar GPS reference clock?

REF IN requires a 10 MHz signal, not a GPS pulse.


73,
Wayne
N6KR

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Re: [Elecraft] KX3 keyline questions

[Wayne Burdick]

Steve,

Are you sure you're looking at the ACC2 ring contact? Ring is KEY OUT; tip is 
GPIO, a logic signal configurable in the ACC2 IO Menu entry.

Wayne
N6KR


> On Nov 21, 2020, at 1:12 PM, Steve Zabarnick  wrote:
> 
> I'm exploring using my KX3 with the QRP-Labs 50W Amplifier. In measuring
> the keyline output, I get zero volts to ground when in receive and about
> 0.5 volts in transmit. When measuring resistance across the keyline I get
> about 70 ohms in receive and 5K ohms in transmit.
> 
> Isn't the keyline supposed to be open in receive and grounded in transmit?
> 
> Steve N9SZ


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Re: [Elecraft] K4/K4D Audio Codec question...

[Wayne Burdick]

Tom  wrote:

> Does the K4, especially the K4D, have two audio codecs, one for each 
> receiver, available via the USB connector?
> 
> This would be highly desirable with the digital mode, being able to monitor 
> the MSK 144 and FT8 frequencies on 6 at the same time.


Yes. This can be done even with a basic K4, since it has independent left and 
right receive channels pertaining to VFO A (main) and B (sub). 

A K4D would give you the ability to use different antennas for the two 
receivers. It also optimizes performance when the two receivers are on 
different bands since it includes a second set of band-pass filters, preamps, 
and attenuators. 

Wayne
N6KR



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[Elecraft] Seeking reviewers for the updated K4 Programmer's Reference

[Wayne Burdick]

The K4 Programmer's Reference is now at a point where we'd like to get 
additional input. This document is intended for application developers, as well 
as for K4 users who wish to create their own macros (strings of commands) for 
assignment to switches on the radio itself or on a K-Pod.

We'll be sending a link to the programmer's reference to our developer's list 
later today. But we'd like to open up this round of review to others who are 
likely users of K4 remote control commands.

The K4 executes a large superset of the commands supported by the K3 and P3. 
The current implementation has already been tested with many popular software 
applications. Thanks to the K4's internal computing horsepower, multiple 
clients can control a single K4 simultaneously, each running different apps.

73,
Wayne
N6KR

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Re: [Elecraft] KX2 External battery question

[Wayne Burdick]

I would definitely *not* use the KXBC2 charger with anything but a KXBT2, or an 
exact equivalent pack, for safety reasons. The voltages and currents are 
targeted specifically at 3 Li-Ion cells (11 V).

Just to give you another [probably biased, beware] opinion on the KXBT2, 
though: The internal battery isn't just about powering the radio, it's about 
mobility. It facilitates the kind of adventurous, ad-hoc, pedestrian mobile 
operation that many KX2 users engage in. (Speaking strictly for me :)

As a battery, the KXBC2 has proven safe and reliable by thousands of users. 
It's about 2.5 AH at 11 V, considerably higher in energy density than the 
battery packs in its closest competitors. I typically get 2 or 3 hours of hunt 
'n' pounce operation at 10 watts. Eventually the radio will drop power to 5 W 
and carry on for another 2 to 3 hours.

73,
Wayne
N6KR




> On Nov 6, 2020, at 4:26 PM, Rich NE1EE <73.de.ne...@gmail.com> wrote:
> 
> Hi Bob,
> Well, to get the ball rolling, I'd say no to the KXBC2. I use several 
> different sizes of the Bioenno LiFe batteries (see earlier threads this 
> summer for a detailed discussion), and I vote to use the proper charger. It's 
> only a few bucks more...on the road, I use an inexpensive converter to power 
> the charger for the LiFe batteries.
> 
> And I recall being surprised by someone writing about a specific Li-ion 
> battery that they got good service from. I don't usually vote for that 
> technology, but the OP had good luck with it. My opinion, tech-based, but 
> still my interpretation of the data, is that Li batteries are generally 
> over-charged, leading to hazard conditions, especially for lower quality 
> batteries, and much shorter battery life.
> 
> Please look for the thread, because there was a lot of good discussion there.
> 
> On 2020-11-06 23:06:+, Bob Conder via Elecraft wrote:
>> KX2 External battery question:
>> 1) Will the KXBC2 charger work with a Bioenno BLF-1203W LiFePO4 battery?or� 
>> 2) What are very lightweight external batteries that will work with KX2, and 
>> not add significantweight while hiking or backpacking and doing SOTA?Tnx in 
>> advance,Bob K4RLC


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Re: [Elecraft] K4 Remote Antenna button

[Wayne Burdick]

> On Nov 2, 2020, at 7:51 AM, Jim Miller  wrote:
> 
> This is mentioned in the online manual. However there's no suggestion as to
> how it would interact with an external device. Obviously some code inside
> the K4 would need to do some signalling, perhaps written by an approved ISV.
> 
> How would it physically transmit commands? USB, Ethernet?


USB, Ethernet, or RS232. There's no limit on how this could be done, but it 
hasn't been added yet. Do you have a particular antenna switch or other device 
in mind? It could also be a rotator, etc.

73,
Wayne
N6KR


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Re: [Elecraft] K4 RX overload protection

[Wayne Burdick]

Hi Ed,

Each of the K4's receivers has a fast-acting Carrier Operated Relay (COR) that 
activates between +20 and +25 dBm. When the COR triggers, it disconnects all 
active circuitry of the associated receiver from the antenna. COR hold time is 
programmable.

For signals that are below COR level but still extremely strong, the K4 can 
automatically (at the user's option) adjust receiver front-end gain to optimize 
dynamic range.

73,
Wayne
N6KR


> On Oct 22, 2020, at 4:51 AM, E.H. Russell  wrote:
> 
> Does the K4 have internal RX overload protection. If not, what RF level can
> it tolerate?
> 
> TKS,
> 73 ED W2RF
> 
> 
> 
> 
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[Elecraft] Fwd: Sunspots sunspots sunspots

[Wayne Burdick]

Bonnie, KQ6XA, posted an encouraging update on sunspots to the HF Pack list.

I can't attach an image to this, but you can click on the provided URL which 
shows activity for yesterday.

73,
Wayne
N6KR



> [hfpack] Sunspots sunspots sunspots
> 
> For those who haven't been tuning in to HF for a while, propagation is 
> improving!
> All the bands are hopping with signals today.
> Sunspots have been up at about 12 to 20 for about the past 11 days. 
> The solar flux is about 74, which is pretty good, compared to the past 3 
> years.
> The A index is currently at 4 (excellent). 
> The K index is currently at 1 (good).
> See sunspot graph attached. 
> -Bonnie KQ6XA
> 
> http://www.sidc.be/silso/DATA/EISN/EISNcurrent.png 
> 



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Re: [Elecraft] sensitvity k4

[Wayne Burdick]

Wrong list, just maybe?


> On Oct 13, 2020, at 5:20 PM, K9FD  wrote:
> 
> Boy it fits the person asking the question.
> There are reams of files and court filings against Hir-onono for harassment
> when she ran or owned a company out here many moons back,  she a dike
> as all the complaints were women.   Of course everything was hidden and
> charges dropped a she was the Dems toy and upcoming politician.
> Probably knew Obozo well when he was here with the commie party.
> I think if you looked in her purse you would find her commie card.
> 
> She is just the mouth of the party,  they know shes to dumb for anything
> else,  and just feed her the papers and what to say on demand.
> 
> 
>> Remember the noise/gain equation and how what determines sensitivity is
>> ultimately a systems noise figure.  ... when used with a transverter or an
>> EME preamp the  noise figure of the system will essentially be set by the
>> noise figure of the first stage.  Subsequent stages have much less effect
>> on the noise figure, as the noise contribution is divided by the gain of
>> the preceding stage.
>> 
>> On Tue, 13 Oct 2020 at 21:47, Richard Donner  wrote:


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Re: [Elecraft] sensitvity k4

[Wayne Burdick]

Hi Richard,

All K4 models utilize the same front-end circuitry (preamps, filters, etc.), so 
all will have virtually identical sensitivity for a given gain setting. These 
in turn will be similar to the K3/K3S.

73,
Wayne
N6KR

> On Oct 12, 2020, at 4:52 PM, Richard Donner  wrote:
> 
> Anyone have an idea which version of the k4 would have the most sensitivity
> for weak signals?
> Thanks  Richard


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