Absolutely and I am very excited to see a top manufacturer giving what
looks like will be first class support for Linux. What I was most excited
to see though was that the radio looked like it might be running a
mainstream Linux distro. My personal opinion is that giving the consumer
the option to
I think it was Eric who said, in one of the recorded interviews,
that the pad controlling the K4 at "Dayton" was running Linux,
and that any device that could provide a virtual machine that
could run Linux could run the control software.
Also, Wayne posted that they would never run Windows in
Wow the radio looks much more impressive in high definition. One thing I
noticed is the screen they have hooked up to the K4 looks like it is
running ubuntu. I find that very interesting. Either it wasn't hooked up to
the radio and it was hooked up to a linux box or we may have access to a
linux
On 5/29/2019 22:12, Jim Brown wrote:
BEFORE the days of microprocessors, switch-mode power supplies, and
other power control systems that use square waves, nearly all man-made
noise was impulse noise. NOW, most of the noise that surrounds us is
from those microprocessors, switch-mode supplies,
On 5/29/2019 6:57 PM, Fred Jensen wrote:
Noise blankers were designed for repetitive impulse noise, the largest
former example of which was ignition noise from vehicles. They have
not ever been very effective against power line hash which tends to be
non-impulsive and highly random.
Huh?
On 5/29/2019 20:57, Fred Jensen wrote:
Noise blankers were designed for repetitive impulse noise, the largest
former example of which was ignition noise from vehicles. They have
not ever been very effective against power line hash which tends to be
non-impulsive and highly random.
That has
Tony,
I agree with Don. I have an early KX1 which is very used, probably thousands
of QSO’s. My VFO problem only
showed up after perhaps a decade of heavy use, so I doubt that any normal
person would ever need to
replace it more than once in a normal lifetime. However if they are still
Thanks for this explanation. Now I'm sure the K4HD will be at
least as good as the K3S and probably better.
Watching Elecraft is like watching a really good magician. With
both, you expect extraordinary things. However, with Elecraft, I
like to know how it is done. :-)
73 Bill AE6JV
On
> In your simulation, between the vertical polarization and the
horizontal polarization in their respective maximum directions, which
was stronger?
In the direction of the horizontal counterpoise, takeoff angle (max) is
60 degrees and vert polarization only, gain of -2,48 dBi.
At right angle
Noise blankers were designed for repetitive impulse noise, the largest
former example of which was ignition noise from vehicles. They have not
ever been very effective against power line hash which tends to be
non-impulsive and highly random. These days, repetitive ignition noise
is not a
I've never found the K3 noise blanker to be very effective on power line
noise, and I've tried all possible combinations of settings. If the K4
noise blanker were really effective on line noise, I might buy one.
73,
Scott K9MA
On 5/29/2019 20:39, Wayne Burdick wrote:
There are some
> Gary Smith wrote:
>
> At this time there are no nearby hams to
> disrupt my K3s. There are no local AM
> broadcasters that come in as overload. I
> do have issues with a few 2nd harmonic
> stations from the BC band, one for example
> from S. America on 1.8400. I won't likely
> be using
That is certainly true.
In your simulation, between the vertical polarization and the horizontal
polarization in their respective maximum directions, which was stronger?
73,
Dave AB7E
On 5/29/2019 6:06 PM, VE2PID wrote:
... Obtained by NEC simulation for the AX1 installed at 4 feet
Part of the charm of a short whip with a dragged counterpoise is that its
directivity from moment to moment is as mysterious as propagation itself. As
with good fiction, it's best to suspend disbelief. Just work 'em.
73,
Wayne
N6KR
> On May 29, 2019, at 6:06 PM, VE2PID wrote:
>
> ...
The K4 is always doing direct sampling for panadapter purposes.
If the HDR module is turned off or is not present, the K4 also does direct
sampling for demodulation.
If the HDR module is turned on, two additional ADCs are used, right at the
outputs of the crystal filters (oversimplifying a
... Obtained by NEC simulation for the AX1 installed at 4 feet above
average ground: If you place yourself in front of the antenna and in the
direction of the 13' horizontal counterpoise, the signal received will
only be vertically polarized for all takeoff angles.
But if you test it in a
David,
You're correct: with a high-Q loaded whip, especially on the low bands,
position of the counterpoise relative to ground, structures and vegetation has
a major impact. In some cases the counterpoise itself radiates more.
On top of that, the SWR can vary all over the map depending on
Hi Skip. Let me take a stab at some of these, and thanks to
Alan, Jeff, and W2XJ for furthering my technical education about ADCs.
(1) With direct sampling, if you are operating in a contest, you
can keep an eye on other bands, like 10M in the current
conditions, while operating on bands
Tony,
The play in the VFO shaft is an indicator that the KX1 you have has been
well used for some time.
The easiest solution is just to replace the encoder.
I have repaired many KX1s, but only a few well used ones have had
encoder problems, so I don't believe there is a "bad batch of
All:
Anyone have an idea for an adapter that would allow the use of the KX2
paddles on the KX1? I have the paddles that came with rig, but prefer
the adjustable KX2 design.
Searched the web for alternatives, but there doesn't seem to be any
retrofit paddles that will attach to the KX1. I
It's not the takeoff angle that makes the difference here. The takeoff
angle of a half wave vertical dipole over real ground is not much
different than the takeoff angle of a quarter wave (or shorter) vertical
fed against a ground plane or counterpoise.
I'm pretty sure that what's really
I never felt any AC in the Hara Arena. Maybe you felt a breeze through the
missing ceiling tiles and leaky roof. LOL
Rich
K3RWN
Typos sent by my iphone
> On May 29, 2019, at 13:02, Bert wrote:
>
> No thanks!
>
> Bert VE3NR
>
>
>> On 5/29/2019 10:26 AM, Edward stallman wrote:
>> I say
All:
I purchased a used KX1 and noticed that the rotary encoder behaves
erratically on occasion where it will momentarily fail to change
frequency when turning the knob.
There's some play in the VFO shaft which maybe the cause of the problem.
The serial number is 666 which seems like an
I'm sticking my neck out here but I think one driver is cost and that includes
assembly and tuning. The K3S for example has some hand soldered parts and if
mine is a representative sample, some selected-at-test parts, with attendant QC
issues.
Wes N7WS
On 5/29/2019 4:01 PM, Fred Jensen
I understand what direct sampling is and how it works. Why is it
preferable [or whatever other positive term you might want to use] to
the superhet design of the K3(s)? I'm curious what sampling the entire
spectrum from 0.1 MHz to 54 MHz buys me?
If I understand the "Superhet" option for
> Getting a 16 bit converter that fast, approaches the limit of available
> technology.
Right. At least at reasonable cost.
> These converters are pipeline architecture and have better than 90 db dynamic
> range.
Theoretically the dynamic range (ADC overload to noise floor) of an ADC
is a
Hi everyone, I was surprised to see that Elecraft included a link to the
YouTube video I posted of my quick Q with Eric WA6HHQ at Hamvention. If
I would have known Elecraft was going to share the link, I would have
waited to upload the 4K version of the K4. :) If you have 4K capabilities,
you
For Sale Elecraft K30 mini with RRK0CBL cable $550.
Howard Sherer
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Thanks for the reply,
As I require diversity , the K4D is
necessary, as I also require an autotuner,
I need that as well. The costs are adding
up.
I certainly don't want a new rig that has
in any way, less capability than the fully
loaded K3s I have now. If a K4HD with
autotuner is
I also anecdotally observed greater propagation with the counterpoise wire
hanging vertically this past weekend.
Intuitively, using a vertical counterpoise, as the "feedpoint" increases in
height away from the ground plane of the Earth, the takeoff angle should
decrease as the radiation pattern
Any of these things you mentioned might not bother you now BECAUSE you are
using a K3.
The K4D adds a second A/D chain with dedicated front end filters for whatever
band the second receiver is tuned to. Plus diversity reception.
I seem to recall some reference to a “wide-band” mode, which
Sorry for that...talking about my KPA1500.
Richard
*W7ZR* ex:5C5Z, CN2ZR, K2JSP, W6SBZ, W7KXR, K9ZIJ, W9KNF, W0KDF, W0MQU,
J68ZR, KC6ZR, PJ4/W7ZR, KH2,W7ZR, KH6/W7ZR, V31ZR, VK4AAZ, XE2DV
*Be joyful in hope, patient in affliction, faithful in prayer*
On Wed, May 29, 2019 at 12:38 PM Jack
At this time there are no nearby hams to
disrupt my K3s. There are no local AM
broadcasters that come in as overload. I
do have issues with a few 2nd harmonic
stations from the BC band, one for example
from S. America on 1.8400. I won't likely
be using my K4 at a contest site and I am
the
What device is involved? There are many with fans.
73,
Jack, W6FB
> On May 29, 2019, at 10:17 AM, Richard Zalewski wrote:
>
> Is fan speed band dependent as well as temp? My fan was 0 but when I
> switched to 6m it ramped up to 2 immediately. Usually anything under 45C
> no fan but on 6m the
Hi Tom,
Transmit monitoring is built in for K4 internal transmit as well as for K4 +
KPA1500.
General monitoring with an external coupler would require the design of a new
coupler that talks to the K4 over USB, etc.
Wayne
N6KR
elecraft.com
> On May 29, 2019, at 11:31 AM, Thomas
Third try with a different email address
> Begin forwarded message:
>
> From: Thomas Donohue
> Subject: Fwd: K4 Question
> Date: May 28, 2019 at 2:22:41 PM EDT
> To: elecraft@mailman.qth.net
>
> Second try
>
> Sent from my iPhone
>
> Begin forwarded message:
>
>> From: Thomas Donohue
>>
Is fan speed band dependent as well as temp? My fan was 0 but when I
switched to 6m it ramped up to 2 immediately. Usually anything under 45C
no fan but on 6m the fan stayed on until it got to 35C.
Richard
*W7ZR* ex:5C5Z, CN2ZR, K2JSP, W6SBZ, W7KXR, K9ZIJ, W9KNF, W0KDF, W0MQU,
J68ZR, KC6ZR,
No thanks!
Bert VE3NR
On 5/29/2019 10:26 AM, Edward stallman wrote:
I say move it to Vegas
Ed N5DG
On 5/29/2019 8:27 AM, Barry wrote:
Carl-N8VZ wrote
According to what I was told, the Greene County Fair Board has
agreed to
put in air conditioning in the three main buildings if the the
Mike,
I have a K3/KPA-500/KAT-500 and also have an amplifier following the
internal 2-meter transverter. Rather than a non-linear "brick," I have the
80/100 W linear amplifier described in the QST article by W6PQL (May 2013 -
Build a Linear 2 Meter 80 W All Mode Amplifier), but the issues are the
The K4 is a direct sampling radio. It has no IF. It samples directly to IQ
baseband and performs all filtering and processing in the digital domain. That
requires a very high speed ADC. In this case it is just above the Nyquist limit
for 6 meters. Getting a 16 bit converter that fast approaches
Hi Charlie,
This is described in the brochure and FAQ. Basically, there are limits to
achievable dynamic range with an A to D converter (direct sampling). The
superheat module improves dynamic range by protecting the demodulation channel
with narrow band crystal filters. In particular,
Yes.
Wayne
elecraft.com
> On May 29, 2019, at 9:20 AM, Jim Miller wrote:
>
> Are the K4HD filters the same ones currently used in the K3?
>
> 73
>
> Jim ab3cv
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Home:
Full Disclosure: I've put my money down on a K4, so I am now in the "cash
recovery" mode.
I have a pair of the Phonema speakers designed specially for the K3/K3S. As
you may know, the Phonemas were the first "aftermarket" speakers for the
K-Line. These Spanish-made speakers both look and
Are the K4HD filters the same ones currently used in the K3?
73
Jim ab3cv
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Wayne,
I live in AK which one of the most active regions for earthquakes ...
But there have not been 500 of them over the last 22-days. Our most
destructive earthquake since the 1964 "Big One" was last Nov. 30 at
7.1. We were about 85 miles south of the epicenter so suffered no loss.
At
Hi Wayne,
I think you answered someone else’s question!?
John
WA1EAZ
Sent from my iPhone
> On May 29, 2019, at 11:47 AM, Wayne Burdick wrote:
>
> Yes. Historically a significant percentage of our K2 and K3 buyers chose the
> QRP model. In some cases operators use the radio as an IF for
My K3 has been through a lot recently! However, something showed up I've
never seen before: FANDP on boot. I tried changing the fans speed to no
avail. Have any of you experienced this? I Googled the code, also to no
avail
73, Bill, K8TE
--
Sent from: http://elecraft.365791.n2.nabble.com/
Yes. Historically a significant percentage of our K2 and K3 buyers chose the
QRP model. In some cases operators use the radio as an IF for transverters, etc.
73,
Wayne
N6KR
> On May 29, 2019, at 4:15 AM, John Stengrevics
> wrote:
>
> Hi Wayne & Eric,
>
> I’ve asked this question twice
What exactly does the Superhet Module added to a K4D actually do?
It's obviously a desirable improvement add-on, but that's about all I know.
I must have missed the explanation if it was provided.
73, Charlie k3ICH
__
Elecraft
> On May 29, 2019, at 4:15 AM, John Stengrevics
> wrote:
>
> 1. Noise Blanking: On the website, under K4 FAQ - Performance Differences,
> it says "In a direct-sampling radio like the K4, the DSP can “see” a wider
> bandwidth in its signal chain, allowing it to provide higher-performance
>
Yes, I've always found hams to be "creative" in many ways. Thanks for
sharing your story.
73
Bob, K4TAX
On 5/29/2019 9:54 AM, Wayne Burdick wrote:
Bob McGraw (K4TAX) wrote:
Based on the Tour of Hara video I saw a few years back, the place is a fire
trap and was filled with junk,
> Dan Atchison via Elecraft wrote:
>
> Noting that the KHDR4 superhet option has crystal filters for SSB and CW (and
> I've seen a potential change of thought to provide a third XTAL filter)
There will be a third crystal filter slot for each receiver on the KHDR4 module.
> is a K4HD
In January, when I received my AX-1 I set it up on the deck (on a tripod and
with the one radial) and promptly worked LZ and YO on 20 M from New Hampshire.
I was using my KX3 at 15 watts. I’m looking forward to the 30/40 add-on.
Thaire. W2APF
> Bob McGraw (K4TAX) wrote:
>
> Based on the Tour of Hara video I saw a few years back, the place is a fire
> trap and was filled with junk, pollution, dangerous chemicals, and garbage
> just to name a few
Bob,
I have a Hara story.
Several years ago, while setting up to demonstrating
Chris,
I would believe that the RF Board components were packed before
mid-January and was not purged of the J310s prior to shipping.
Granted, that should have been purged, but for some reason (perhaps
human error), it apparently was not.
73,
Don W3FPR
On 5/29/2019 10:14 AM, Chris Smith
> wrote:
>
> Your photos all seem to show the KAT 4 installed with no disclaimer about
> any accessories being included in the image.
The KAT4 is an option, as is correctly stated throughout the K4 web page and
order forms. This was also made clear at Dayton for those placing an order. But
Mike,
The real answer to your question is - do you have a problem with the
KPA500 and your 2M brick amplifier being keyed at the same time?
There should be no RF input to the KPA500 when on 2M, and when on HF+6M
there should be no RF input to your 2M amplifier.
So, are you OK with keying
I say move it to Vegas
Ed N5DG
On 5/29/2019 8:27 AM, Barry wrote:
Carl-N8VZ wrote
According to what I was told, the Greene County Fair Board has agreed to
put in air conditioning in the three main buildings if the the Hamvention
folks will sign a long-term contract. I think they want
> Jim Miller (ab3cv) wrote:
>
> If/when implemented how would the REM ANT control communicate with the
> controlled device?
Hi Jim,
There are several possibilities: Ethernet, USB, RS232, or indirectly through an
attached computer.
73,
Wayne
N6KR
If/when implemented how would the REM ANT control communicate with the
controlled device?
73
Jim ab3cv
> On May 28, 2019, at 11:53 PM, Wayne Burdick wrote:
>
> n6wg wrote:
>
> There are 5 rx ant ports on the K4, 3 UHF and 2 BNC. I've seen no mention of
> how they are to be selected
Thanks for the detailed reply. That makes sense entirely.
To note this K2 shipped in early May so there may be problems still.
Best regards,
Chris M0XTE
On Wed, 29 May 2019, at 14:49, Don Wilhelm wrote:
> Chris and all,
>
> Let me try to add some clarity to this J310 situation:
>
> 1.
Based on the Tour of Hara video I saw a few years back, the place is a
fire trap and was filled with junk, pollution, dangerous chemicals, and
garbage just to name a few. Yes it should have been torn down years
ago. Maybe the tornado with move things in that direction and
something decent
Chris and all,
Let me try to add some clarity to this J310 situation:
1. Thru-hole J310s have been discontinued. Last August, Elecraft
ordered a new supply (from a new source) which proved to be inadequate
for the K2 PLL Reference Oscillator circuit. A source of New Old Stock
for J310s was
I don't have room to set it all up right now, but I have done that in the
past. Just left the KPA500 & KAT500 unpowered. Also with an external 430
transverter and amp.
Jim Rhodes
K0XU
On Wed, May 29, 2019, 08:10 Mike Sanders wrote:
> I have a K3 with built in 2M transverter. The K3 drives the
Carl-N8VZ wrote
> According to what I was told, the Greene County Fair Board has agreed to
> put in air conditioning in the three main buildings if the the Hamvention
> folks will sign a long-term contract. I think they want something like a
> ten-year deal. 73 de Carl N8VZ
They should also put
Good morning Wayne,
You mention, "(if a KAT4 is installed: ANT 1/2/3). So the KAT 4 is not
included in a K4?
On your K4 page, under "Specs", "Standard Features", you list "KAT4 ATU:
10:1+ range; 3 ant. Jacks".
Your photos all seem to show the KAT 4 installed with no disclaimer about
any
I have a K3 with built in 2M transverter. The K3 drives the KPA500 and
KAT500 with the KPAK3AUX. Everything works
fine. I do not have the key line interrupter installed. Reading notes 5
and 6 on the KPAK3AUX I am a bit confused.
I want to key a 2M brick amplifier with the key out line on the
Noting that the KHDR4 superhet option has crystal filters for SSB and CW
(and I've seen a potential change of thought to provide a third XTAL
filter), is a K4HD still capable of wide-band reception, i.e. FM or
other modes? IOW, can I assume WB reception can be done in a K4HD
without a
So far longest DX on AX-1 was AM70R with KX-2 CW on 20 meters from my back
porch (west of Toronto) last week.
73
Peter - VE3HG
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Hi Wayne & Eric,
I’ve asked this question twice already with no answer. Perhaps it’s the way I
phrased it. So, let me ask it a different way:
1. Noise Blanking: On the website, under K4 FAQ - Performance Differences, it
says "In a direct-sampling radio like the K4, the DSP can “see” a
Hi,
I have replaced the J310 and the oscillator now runs over the full voltage
range of the DAC. Many thanks. After this, the PLL calibration routine
completes successfully. The EEPROM appears to be ok here.
So at a high level the issue appears to be:
1. The J310 or circuit was at fault.
Comparing a 24 bit ADC at a 32 KHz sample rate to a 16 Bit ADC at 122 Msps
and saying it is less bits and therefore will have worse performance isn't
a great comparison. The high speed ADC would be highly oversampling the
signal at the second IF. This allows the ADC to use some neat tricks to
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