[Elecraft] Elecraft K3 support

[John Gibson]

Dear Elecraft Friends,

Up through last weekend I had been operating my K3 #820 with MCU 4.31 and DSP 
2.72, firmware that dated from March 2011. I was content with my K3’s 
performance, and saw no reason to upgrade. 

But Reflector reports praising recent improvements in NR and NB operation 
finally persuaded me that I should update my K3. Accordingly, last Monday I 
downloaded the latest Mac K3 Utility and began the upgrade. All went well until 
the Utility tried to install the DSP files, at which point my K3 choked and 
everything stopped. I suddenly had a non-working radio and was at an impasse.

I contacted Elecraft support and soon heard from Gary Surrency. Gary, in turn, 
passed my message on to David Fleming, who has full responsibility for the Mac 
K3 Utility.

David was solicitous and extremely helpful. He pointed out that my ancient Mac 
Powerbook computer with OS 10.4.11 is too long in the tooth to run the current 
Mac K3 Utility, and he kindly sent me the latest version that my computer would 
tolerate. Following his very specific instructions, I used that older Utility 
to successfully install all of the new firmware files. My K3 now is back in 
operation with the latest firmware.

David went far beyond the call of duty to help me solve my problem. In fact, he 
sent his last e-mail message to me last evening at 10:40 p.m. (we both are on 
EDT). I consider his dedication typical of what we all have come to expect from 
Elecraft support.

Thank you David, and thank you Elecraft.

73,
John, no8v
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Re: [Elecraft] OT: WWV-driven station clock that displays zulu time

[John Gibson]

Hi Brian,

A Heathkit GC-1000 atomic clock (if you can find one) can be DC powered.

73,
John, no9v

-What I would love to see (I've searched and searched to no avail) is an
atomic clock with a nice LED display that is DC powered.

LED so it can been seen at night (or during a power outage), unlike most LCD
clocks which have a momentary backlight feature.

DC powered so it can run off of battery power or a shack DC power supply.

The closest I found was a called a Dakar Rally Clock which is a LED
DC-powered clock that mounts on the dash of offroad racing trucks.  No
atomic sync feature, though.

Perhaps a future Elecraft product?

73 N5BCN - Brian
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[Elecraft] OT: Quiet 12V-to-5V converter

[John Gibson]

Dear Elecraft list members,

The recent thread on noisy switching power supplies leads me to a related 
question. My son n8fyk, who teaches radio astronomy, has set up a project with 
his students. They are using a 15m direct-conversion Radio Jove receiver in the 
field to monitor radio emissions from Jupiter, the sun, and the galaxy. The 
receiver operates from 12V, which is readily supplied by a portable utility 12V 
battery pack. Their problem is powering their data recorder, which needs about 
5V at 0.7A.

The data recorder is designed to operate from three internal AA alkaline cells, 
but these give a limited run time. My son would like to be able to leave the 
receiver and recorder for unattended operation for several days at a time. 

One solution would be to use a 12V-to-5V power converter between the 12V 
battery and the data recorder. For long battery life, it would be nice to have 
the efficiency of a switching converter. Such a converter would have to be 
RF-quiet, so as not to interfere with their weak-signal reception. 

I will be interested to hear what list members recommend.

Thank you and 73,

John, no8v
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Re: [Elecraft] OT: Quiet 12V-to-5V converter

[John Gibson]

Thanks  to all who responded to my query. At this point I plan to follow Jack 
Smith's excellent recommendation to build a DC-to-DC converter based on the 
LM-2591 chip and do my best with appropriate filtering to keep RFI from getting 
out of the box.

I appreciate having the excellent resources of the Elecraft reflector to draw 
upon for solving this type of problem.

73,
John, no8v
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Re: [Elecraft] OT: Quiet 12V-to-5V converter

[John Gibson]

Thanks, Fred. The LMZ12001 does look attractive. The best solution may be for 
me to buy their LMZ12001EVAL/NOPB evaluation board.

See http://www.national.com/pf/LM/LMZ12001.html#Boards

I will, of course, add appropriate input and output filtering.

73,
John, no8v
- 
From: Fred Townsend ftowns...@sbcglobal.net
Subject: RE: [Elecraft] OT: Quiet 12V-to-5V converter

If you are going for the 2591 take a look at the LMZ12001. Fewer parts, lower 
RFI.
-
From: elecraft-boun...@mailman.qth.net
Subject: Re: [Elecraft] OT: Quiet 12V-to-5V converter

Thanks  to all who responded to my query. At this point I plan to follow Jack 
Smith's excellent recommendation to build a DC-to-DC converter based on
the LM-2591 chip and do my best with appropriate filtering to keep RFI from 
getting out of the box.

73,
John, no8v
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Re: [Elecraft] How good is the KX3 CW decode?

[John Gibson]

Hi Wayne,

Is this also true of a comparison between a K3 and CW Skimmer?

73,
John, no8v
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Re: [Elecraft] Elecraft CW Net Announcement

[John Gibson]

Hi Kevin,

Jean and I had been in Kalamazoo and returned to Alma too late for me to check 
in to ECN/20. I tried for ECN/40 and think I heard you announce the net, but 
you were so buried in QRN that I could judge it was you only by the rhythm of 
your sending. I tried to respond, but am not sure you could hear me.

The weather here has been mild, punctuated by occasional snow squalls. Jean and 
I ran into a blizzard and dangerously icy roads on our trip down to Kalamazoo, 
which was experiencing a lake-effect snow storm and had a couple of inches 
accumulation on the ground when we arrived

We plan to be in Kalamazoo though the Christmas holidays, but I hope to rejoin 
you on the Elecraft net early in the new year.

Merry Christmas.

73,
John, no8v

From: Elecraft  on behalf of kev...@coho.net 

Sent: Sunday, December 20, 2015 1:02 PM
To: elecraft@mailman.qth.net
Subject: [Elecraft] Elecraft CW Net Announcement

Good Morning,
 Please join us this afternoon and evening for the 'regular' CW Nets.

14050 kHz at 2300z Sunday (3 PM PST Sunday)
7045 kHz at 0200z Monday (6 PM PST Sunday)

73,
Kevin.  KD5ONS
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[Elecraft] Jade Products battery charger

[John Gibson]

I have a Jade Products battery charger, originally purchased as a kit and built 
about 1999. The design uses a UC3906 three-state charger IC, which was very 
much in vogue at the time. A label on the charger indicates that the company 
was located in E. Hamstead, NH. I believe the designer and company owner was a 
ham.

I have lost the owner’s manual and am looking for any literature I can find on 
the charger. I especially would like to have a circuit diagram.

If you can help me, please reply off list.

Thank you.

73,
John Gibson, no8v
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Re: [Elecraft] KX2 haiku (attempt 1)

[John Gibson]

I must hike today.

My KX2 goes with me.

My link to the world.

73,
John Gibson, no8v


From: Elecraft <elecraft-boun...@mailman.qth.net> on behalf of Wayne Burdick 
<n...@elecraft.com>
Sent: Tuesday, May 24, 2016 12:36:13 AM
To: kev...@coho.net
Cc: elecraft@mailman.qth.net
Subject: Re: [Elecraft] KX2 haiku (attempt 1)

:)


On May 23, 2016, at 9:23 PM, "kev...@coho.net" <kev...@coho.net> wrote:

> It is a small rig
>
> Full of well thought out features
>
> Many bands and modes
>
>
> Kevin.  KD5ONS
>
> __
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> Message delivered to n...@elecraft.com

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[Elecraft] KX2/KX3 built-in speakers

[John Gibson]

Dear KX2 or KX3 owners,

If you own a KX2 or KX3, do you find that the built-in speakers produce sound 
of sufficient loudness and good intelligibility?

I do not (yet) own one of these fine radios, so I must ask others for this 
information.

Thank you and 73,

John, no8v
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[Elecraft] N1BYT Single Loop Receiver query

[John Gibson]

Many years ago I bought an N1BYT Single Loop Receiver at the Dayton Hamvention. 
The radio has 3 controls and came with a small single-loop wire antenna that 
plugs into an NE602AN balanced mixer. Other ICs include an Analog Devices 
AMP04F instrumentation amplifier, an LM386 audio amplifier, and an LP2951 
voltage regulator.

Because of work and family obligations, I set the radio aside and did not use 
it. Just recently, I found the radio, powered it up, and it works, but I could 
not find the instruction sheet, and I have forgotten the control functions and 
basic operating procedure.

If you have instructions for the N1BYT Single Loop Receiver, would you be kind 
to share them with me? Please reply off list.

73,

John Gibson, no8v
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[Elecraft] Test 2018-05-20

[John Gibson]

This is a test message; please ignore.

no8v
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[Elecraft] Test 2018-05-21

[John Gibson]

This is 2nd test message. Please ignore.

73,

John, no8v

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Re: [Elecraft] Sub RX Deaf??

[John Gibson]

Correction: I should have said that when I installed my KRX3, it was deaf 
because I had overlooked the step about configuring the ROOFING filters.

73,
John, no8v


From: elecraft-boun...@mailman.qth.net  on 
behalf of ROCCON GRAZIANO GIULIANO 
Sent: Monday, February 12, 2018 5:20:50 AM
To: GWK; elecraft@mailman.qth.net
Subject: Re: [Elecraft] Sub RX Deaf??

Hello Chris,


i just installed the second RX me too.

Same impression during first but the solution was very easy for me, i
had the Config:spkr set to 2 instead of 1 and simply i had not audio
from the second rx.

Changing Config:spkr value from 2 to 1, make the second rx "screams"
correctly :-)

Ah, and look also in the menù config for KRX3 if is activated and you
choose ANT=ATU if you have not installed the dedicate BNC or ANT=BNC if
you have installed the dedicate BNC, remember to connect and antenna to
the BNC in this case.

73's de IW2NOY.



Il 12/02/2018 01:49, GWK ha scritto:
> Chris,
> When I built my K3 years ago, the Sub-Rx didn't work.  I found I had
> plugged the synthesizer module (KSYN3 at that time) into its socket
> just one pin off - very hard to see.  Corrected it and never looked
> back. Fortunately, no damage to the synthesizer in doing this.
> So maybe?
> George, W3HBM
>
> On 2/11/2018 3:43 PM, Chris Soames wrote:
>> Hi Just fitted SubRx into my K3 nothing heard only background noise,
>> no matter what ant configuration or other setting,
>> SubRx appears to be deaf?
>>
>> Oh dear where to next?
>>
>> Chris G0TZZ
>> __
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Re: [Elecraft] Sub RX Deaf??

[John Gibson]

When I installed my KRX3, it was deaf because I had overlooked the step about 
configuring the bandpass filters.

73,
John, no8v


From: elecraft-boun...@mailman.qth.net  on 
behalf of ROCCON GRAZIANO GIULIANO 
Sent: Monday, February 12, 2018 5:20:50 AM
To: GWK; elecraft@mailman.qth.net
Subject: Re: [Elecraft] Sub RX Deaf??

Hello Chris,


i just installed the second RX me too.

Same impression during first but the solution was very easy for me, i
had the Config:spkr set to 2 instead of 1 and simply i had not audio
from the second rx.

Changing Config:spkr value from 2 to 1, make the second rx "screams"
correctly :-)

Ah, and look also in the menù config for KRX3 if is activated and you
choose ANT=ATU if you have not installed the dedicate BNC or ANT=BNC if
you have installed the dedicate BNC, remember to connect and antenna to
the BNC in this case.

73's de IW2NOY.



Il 12/02/2018 01:49, GWK ha scritto:
> Chris,
> When I built my K3 years ago, the Sub-Rx didn't work.  I found I had
> plugged the synthesizer module (KSYN3 at that time) into its socket
> just one pin off - very hard to see.  Corrected it and never looked
> back. Fortunately, no damage to the synthesizer in doing this.
> So maybe?
> George, W3HBM
>
> On 2/11/2018 3:43 PM, Chris Soames wrote:
>> Hi Just fitted SubRx into my K3 nothing heard only background noise,
>> no matter what ant configuration or other setting,
>> SubRx appears to be deaf?
>>
>> Oh dear where to next?
>>
>> Chris G0TZZ
>> __
>> Elecraft mailing list
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>> This list hosted by: http://www.qsl.net
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>> Message delivered to gkid...@ilstu.edu
> __
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> Message delivered to grazi...@roccon.com
>

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[Elecraft] test message #2 2018-02-19

[John Gibson]

This is a 2nd test message from a different computer.

73,
John, no8v
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[Elecraft] test message 2018-02-19

[John Gibson]

This is a test message.

73,
John, no8v
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Re: [Elecraft] K3 KIO3 board needed

[John Gibson]

Bruce,

I have a KIO3 board that I bought new and never installed (my K3 has a KIO3B 
board installed).

73,

John, no8v


From: elecraft-boun...@mailman.qth.net  on 
behalf of Bruce Meier 
Sent: Sunday, September 2, 2018 10:39:37 AM
To: elecraft@mailman.qth.net
Subject: [Elecraft] K3 KIO3 board needed

Does anyone happen to have the K3 model KIO3 circuit card that is excess to
their needs?   If you have upgraded to the new K3S KIO3B you may have one.
It seems that the RS232 control on one of my K3 XCVRs has bit the dust.   I
checked with Elecraft and they no longer have any of the old style.  That
leaves me with a mandatory upgrade (expensive if I don't need it) or send
the K3 back to Elecraft for a repair.  It seems a bit excessive to send it
back for such a simple problem.



I am now off to the schematics to see what chip is probably blown - but I am
NOT a surface mount person so that may be just a fun exercise in schematic
reading.



Thanks for your help!!



73,

Bruce N1LN

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[Elecraft] KX2 with short whip antenna

[John Gibson]

Hi Wayne,

I enjoyed your 2018 Field Day report, especially the part about your solo trek 
with the KX2 and the prototype 2-band, 4’ antenna.

For the KX2 with the short whip, please tell us what bands you operated on and 
what you used for a counterpoise.

73.

John Gibson, no8v
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Re: [Elecraft] [KX3] New Product: SPX3 External Speaker

[John Gibson]

Hi Robert,

Your proposed speaker looks interesting. Thank you for offering it.

My need is a little different. I want to use a KX2 for portable emergency 
communication, powering it directly from a 12V lithium iron phosphate (LFP) 
battery. For this application I would like to power an external amplified 
speaker directly from the same 12V LFP battery. I would be rather not have to 
recharge an amplified speaker's internal battery.

73,
John, no8v


From: elecraft-boun...@mailman.qth.net  on 
behalf of Robert J. Morris 
Sent: Thursday, April 12, 2018 1:06:25 PM
To: elecraft@mailman.qth.net
Subject: [Elecraft] [KX3] New Product: SPX3 External Speaker

I've built a prototype powered external speaker for the KX3, and would
like some feedback on what folks would desire in terms of features, and
whether folks would want to own one.

The speaker currently is designed to match the overall look of the KX3
and PX3, and accept similar third-party panels and covers as for the KX
line. Presently, it uses the same legs and feet as the KX3 and PX3, and
is the same height and depth as those. There is one USB port for
charging the internal lithium battery, and input and output stereo
jacks. The speaker is mono. The output jack redirects the right channel
from the stereo input for a second speaker, just like with the Elecraft
SP3 and other similar external speakers. The speaker is amplified.

The SPX3 puts out a maximum of 3W, and is about as loud as any external
radio speaker gets. Volume is adjusted by the KX3. It plugs into the KX3
PHONES jack. There is a built-in low pass filter to reduce noise and
improve the listening experience.

The prototype, as you'll see in pictures in the links below, is slightly
narrower than the expected finished product. The speaker driver and
on/off switch are both waterproof, but - just like the KX3 and PX3 - the
case isn't. So, don't drop it in a lake. It will handle all conditions
appropriate for the KX3, and is meant for indoor and outdoor use. Having
matched the case design so closely to the KX3, it isn't as airtight as
I'd like it, so the next prototype will have the case halves join in a
more customary way, but remain the same dimensions and overall look.
This will also improve ingress protection.

You'll see the speaker is not a polished finished product yet, as it's a
rough first prototype made by hand. Your feedback will assure the final
product is what you want gracing your portable shack.

Please note, the KX3 in the photo is only to demonstrate the speaker.

All feedback is welcome. Please let me know which reasonable
enhancements or simplifications you'd like to see.
Examples:
* Would you want an output USB port to use the speaker to charge your
phone?
* Would you want to dispense with the built-in battery, and run it
entirely from external power?
* Would you want a second passive speaker driven by the first to save on
weight and cost? That is, a SPX3A (active, with battery, charger, and
amp) and SPX3P (passive, with only speaker driver)
* If you're a KX2 user, would you like me to produce the SPX2 (also in
development)?

Pictures:
SPX3 with KX3: http://www.iloc.com/ag6zz/SPX3/AG6ZZ_SPX3_KX3.JPG
SPX3 Left Oblique:
http://www.iloc.com/ag6zz/SPX3/AG6ZZ_SPX3_LeftOblique.JPG
SPX3 Right Oblique:
http://www.iloc.com/ag6zz/SPX3/AG6ZZ_SPX3_RightOblique.JPG

73,
Robert (AG6ZZ)

SPX2, SPX2A, SPX2P, SPX3, SPX3A, and SPX3P are Trademarks (TM) of Robert
J. Morris
SPX2, SPX2A, SPX2P, SPX3, SPX3A, and SPX3P are Copyright (C) 2018 by
Robert J. Morris
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[Elecraft] Elecraft newsletter

[John Gibson]

How do I sign up to receive the Elecraft newsletter? And where do I find back 
issues?

Thank you and 73,

John, no8v
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[Elecraft] Test message - 2020-07-02

[John Gibson]

Test.

73,

John, no8v
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Re: [Elecraft] K3 Audio Peaking Filter

[John Gibson]

Hi Bill,

Thank you for your query. My K3 has the 400 Hz CW roofing filter. Because of 
currently challenging conditions, I usually set my K3’s width control to 25 Hz. 
My preferred audio frequency is 600 Hz. 

Those were my K3’s settings when I tried to check into the Elecraft CW net last 
evening.

I engaged the APF after nothing else worked. Following N6KR’s recommendation, I 
used fine tuning (1-Hz steps). I tuned around slowly near the expected net 
frequency of 14.050 MHz and suddenly heard net control Kevin KD5ONS calling at 
14.05045 MHz. 

I recognized Kevin, as I often do, by the rhythm of his sending. He was loud! 
When I turned off the APF, he vanished.

I believe that tuning slowly in 1-Hz steps is the secret to making the APF 
work. 

I hope this helps.

73,

John, no8v



From: William Hammond 
Sent: Monday, June 22, 2020 12:55 PM
To: John Gibson
Subject: Re: [Elecraft] K3 Audio Peaking Filter


Hi John, that is fantastic!!  I have never experienced anything near what you 
describe with a K3s or my original updated K3 SN 00069.  I find that a very 
narrow 200 hz CW filter works best for me in those conditions you so apply 
described.  Tell me more, do you open up the filters to kHz?  Please describe 
how you set this please.  I have tried all prescriptions I have read on this 
reflector and had no joy with any of them..perhaps I need some schooling?

73, Bill-AK5X

> On Jun 22, 2020, at 11:27 AM, John Gibson  wrote:
>
> Each Sunday evening, I use my K3 #820 to try to check into Kevin’s 20m 
> Elecraft CW net. Kevin in Oregon is almost 1900 miles from me in Michigan, 
> and I succeed only because I have a modest tri-band beam antenna at 60 ft.
>
> Current propagation conditions make this especially challenging. Sometimes 
> Kevin is so buried in noise that I find him only because I can recognize the 
> rhythm of his sending.
>
> Last evening, conditions were poor. I tuned all around the net frequency and 
> could hear nothing of Kevin. Then I turned on my K3's Audio Peaking Filter 
> (APF), searched again, and found him, and he was loud! When I turned off the 
> APF, he vanished. I did check into the net.
>
> My K3's APF made all the difference between hearing Kevin and not finding 
> him. I am impressed that it worked so well. I thank Wayne N6KR for creating 
> this feature for the K3.
>
> 73,
>
> John, no8v
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[Elecraft] K3 Audio Peaking Filter

[John Gibson]

Each Sunday evening, I use my K3 #820 to try to check into Kevin’s 20m Elecraft 
CW net. Kevin in Oregon is almost 1900 miles from me in Michigan, and I succeed 
only because I have a modest tri-band beam antenna at 60 ft.

Current propagation conditions make this especially challenging. Sometimes 
Kevin is so buried in noise that I find him only because I can recognize the 
rhythm of his sending. 

Last evening, conditions were poor. I tuned all around the net frequency and 
could hear nothing of Kevin. Then I turned on my K3's Audio Peaking Filter 
(APF), searched again, and found him, and he was loud! When I turned off the 
APF, he vanished. I did check into the net.

My K3's APF made all the difference between hearing Kevin and not finding him. 
I am impressed that it worked so well. I thank Wayne N6KR for creating this 
feature for the K3.

73,

John, no8v
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[Elecraft] Arecibo radio telescope

[John Gibson]

For another perspective on the loss of the Arecibo radio telescope, see

https://tinyurl.com/y4u3dm88

73,

John Gibson, no8v
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[Elecraft] Another perspective on the Arecibo Telescope

[John Gibson]

To see another perspective on the Arecibo radio telescope, read

<https://thebulletin.org/2020/12/a-blow-to-our-pride-a-puerto-rican-scientists-lament-for-the-loss-of-a-legendary-telescope/>

73,

John Gibson, no8v
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[Elecraft] Test message.

[John Gibson]

Test message.

73,

John, no8v
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