Re: [Elecraft] K3 MCU LD

[Josep Torres via Elecraft]

Hi guys,

New to this list. Been suggested by a fellow ham.

I have a K3 that get stuck while trying a firmware/software update.
Problem is that seems to be no communication between the PC (WIN7) and the K3 
as I get a message of “K3 is not responding”.

I use a Serial to USB cable and have been told that not all cables work. This 
morning I will try to buy another one and try again. If this doesn’t recover’s 
the K3 from MCU stuck, I will have to sent it to Italy to Official Service to 
get recovered from them. Of course this is the most expensive solution, but the 
only way I see to get it back to life.
So, what do you recommend for such a cable so PC and K3 can communicate.?

Thanks,


73,

Josep
EA6BF
BUG #256  -  CWops #3072  -  FOC #2182 (ex 1724)




> On Apr 3, 2022, at 22:18, Dick Dievendorff  wrote:
> 
> There are step by step instructions in K3 Utility Help, Trouble Shooting. 
> 
> 73 de Dick, K6KR
> 
>> On Apr 3, 2022, at 13:25, Don Wilhelm  wrote:
>> 
>> Go to the manual and look up how to recover from that condition (Forcing a 
>> firmware download).
>> It on page 42 of my old manual under Firmware Updates, the page may have 
>> changed in newer manuals.
>> It is easy to do and does not have to  go to a repair facility.
>> 
>> 73,
>> Don W3FPR
>> 
 On 4/3/2022 1:37 PM, hp via Elecraft wrote:
>>> Here is one line from an EA6 message about a K3 he just purchased .
>>> 
>>> Elecraft K3 is stuck at MCU LD and need to be sent to Italy to Elecraft 
>>> Official Service to recover it.
>>> 
>>> Are there any tricks to recover without sending it to a service site ??
>>> 
>>> I have told him how to subscribe to the reflector and gave him a link to 
>>> the archives
>>> but maybe someone has a quick answer which I can forward to him .
>>> 
>>> Hank K7HP
>>> 
>>> 
>>> 
>>> __
>>> Elecraft mailing list
>>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
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>>> Message delivered to d...@w3fpr.com
>> 
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[Elecraft] Elecraft CW Net Report

[kevin]

Good Evening,

   Conditions were as I had expected.  Twenty meters had more noise 
with deeper QSB, but both bands worked to some extent.  It will be 
difficult to complete my antenna soon, snow is forecast until 
Wednesday.  Then more rain.



  On 14050.5 kHz at 2200z:

NO8V - John - MI

K4JPN - Steve - GA

K6XK - Roy - IA

W0CZ - Ken - ND

AC5P - Mike - OK

AB9V - Mike - IN


  On 7047.5 kHz at 2330z:

KG7V - Marv - WA

WM5F - Dwight - ID

K7TXA - Jim - ID

K0DTJ - Brian - CA

WB6PGJ - Dennis - CA


   Until next week 73,

  Kevin.  KD6ONS


-



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Re: [Elecraft] Boom mounted Mike for a KX3

[Jim Brown]

On 4/3/2022 6:58 PM, John Pierce via Elecraft wrote:

  am finding out that the KX3 does not handle a  dynamic
microphone well.


I disagree, and I'm an audio guy. All you need is a properly wired 
adapter. and adjustment of TXEQ to compensate for the fact that pro mics 
are usually flat. But nowadays, nearly all the boom mics small enough to 
use are electrets, including the CM500. And PRO electret mics won't work 
with ham gear -- the powering method is very different.


73, Jim K9YC
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Re: [Elecraft] Boom mounted Mike for a KX3

[Jim Brown]

On 4/3/2022 6:58 PM, John Pierce via Elecraft wrote:

Any solution would be a mike that will
mount on my boom mike arm.


Just about any headset with an electret or dynamic boom mic will work 
with a suitable cable adapter to split the TRRS in the KX3 into a TRS 
for the phones and a TRS for the mic. My favorite is a Yamaha CM500, but 
the phones may be much larger than you want to carry. I suggest that you 
study boom-mic headsets made for gamers, because selling to a very large 
market makes them cheaper. There are lots of smaller headsets, but it's 
mostly a matter of comfort. You may be able to look them over online, 
and/or in a music store.


In addition to Yamaha, some good brands are Shure, Audio-Technica, 
Sennheiser, and Beyer.


73, Jim K9YC


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[Elecraft] Boom mounted Mike for a KX3

[John Pierce via Elecraft]

I have a Kx3, because I can take it to the field.  But most of the time I
use it at the home shack.  I recently got an amp to use with the KX3, but I
am getting  tired of using the elecraft hand mike.  I have a boom mount for
a microphone, but am finding out that the KX3 does not handle a  dynamic
microphone well.  So my dilemma for a dynamic  mike seems to be:  1- adding
a mixing board that will boost the output of the dynamic mike to acceptable
levels for the KX3.   2 -  Getting an inline mike amp and a 48v power supply
to run the inline amp.   The mixing board solution would work, but I don't
have the desk space for it.   For a condenser microphone solution, it would
need to operate off the 3v bias voltage from the KX3.  Does anyone have
ideas of how to solve my dilemma?.   Any solution would be a mike that will
mount on my boom mike arm.

 

John, AD2F

 

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Re: [Elecraft] KWM-380 (was K4 and Delivery Delays)

[Ray]

I unfortunately worked for the DoD,
And we had Many of the KWM-380’s-- Many Problems !

Ray WA6VAB

From: Ed W0YK
Sent: Sunday, April 3, 2022 4:32 AM
To: Bill Tippett; Elecraft Reflector
Subject: Re: [Elecraft] KWM-380 (was K4 and Delivery Delays)

I'm not surprised.  The receiver is chock full of internally generated birdies. 
 On a dead band, a bandscope looks like a major contest!73,Ed W0YK
 Original message From: Bill Tippett  
Date: 4/3/22  03:12  (GMT-08:00) To: Elecraft Reflector 
 Cc: e...@w0yk.com Subject: KWM-380 (was [Elecraft] 
K4 and Delivery Delays) W0YK wrote:The KWM-380 may have been a "hot radio" in 
some people's minds, but I can personally attest to the opposite.  I have one, 
along with a number of KWM-2As and S-Lines.  The 380 is a horrible performer.  
The receiver is incredibly noisy, obstructing reception of all but the loudest 
signals.  The audio is distorted and filtering is poor.  Collins' last hurrah 
was a dud.Hi Ed, I don't recall ever telling you this but your 380 also had 
horrible TX phase noise.  In the early 80s, we were located within 5 miles of 
each other in CO, both running amps.  Whenever you transmitted on 80 or 160, 
the phase noise would cover the entire CW bands.  I don't recall what you 
replaced the 380 with but I was a very happy camper when you did!I take pride 
that my KSYN3A-updated K3 is still one of the cleanest CW signals on the 
bands.73,  Bill  W4ZV  (ex-W0ZV)
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Re: [Elecraft] K3 MCU download /

[Dick Dievendorff]

There are step by step instructions in K3 Utility Help, Trouble Shooting. 

73 de Dick, K6KR

> On Apr 3, 2022, at 13:25, Don Wilhelm  wrote:
> 
> Go to the manual and look up how to recover from that condition (Forcing a 
> firmware download).
> It on page 42 of my old manual under Firmware Updates, the page may have 
> changed in newer manuals.
> It is easy to do and does not have to  go to a repair facility.
> 
> 73,
> Don W3FPR
> 
>> On 4/3/2022 1:37 PM, hp via Elecraft wrote:
>> Here is one line from an EA6 message about a K3 he just purchased .
>> 
>> Elecraft K3 is stuck at MCU LD and need to be sent to Italy to Elecraft 
>> Official Service to recover it.
>> 
>> Are there any tricks to recover without sending it to a service site ??
>> 
>> I have told him how to subscribe to the reflector and gave him a link to the 
>> archives
>> but maybe someone has a quick answer which I can forward to him .
>> 
>> Hank K7HP
>> 
>> 
>> 
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Re: [Elecraft] K3 MCU download /

[Kyle Chavis]

Page 47 =
https://ftp.elecraft.com/K3S/Manuals%20Downloads/K3S%20Owner's%20man%20A1.pdf

K3S Firmware Self-Test
If the K3S detects an error in its firmware (an incorrect checksum), it
will flash the TX LED and show MCU LD on the LCD (with backlight off). If
this occurs, connect the K3S to your computer and reload firmware. While
firmware is loading, the Delta-F LED (∆f) will flash. When the download is
complete, the K3S should reset and run normally.

Forcing a Firmware Download
If you accidentally load an old or incompatible firmware version and find
the K3S unresponsive, do the following: (1) unplug the K3S from the power
supply and wait 5 seconds; (2) plug the power supply back in; (3) hold the
transceiver’s POWER switch in; after about 10 seconds, you’ll see the TX
LED flash (you’ll also see MCU LD on the LCD); (4) load the correct
firmware version.

Good Luck!!
Kyle, WA4PGM

On Sun, Apr 3, 2022 at 2:25 PM Don Wilhelm  wrote:

> Go to the manual and look up how to recover from that condition (Forcing
> a firmware download).
> It on page 42 of my old manual under Firmware Updates, the page may have
> changed in newer manuals.
> It is easy to do and does not have to  go to a repair facility.
>
> 73,
> Don W3FPR
>
> On 4/3/2022 1:37 PM, hp via Elecraft wrote:
> > Here is one line from an EA6 message about a K3 he just purchased .
> >
> > Elecraft K3 is stuck at MCU LD and need to be sent to Italy to Elecraft
> Official Service to recover it.
> >
> > Are there any tricks to recover without sending it to a service site ??
> >
> > I have told him how to subscribe to the reflector and gave him a link to
> the archives
> > but maybe someone has a quick answer which I can forward to him .
> >
> > Hank K7HP
> >
> >
> >
> > __
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> > Help: http://mailman.qth.net/mmfaq.htm
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> > Please help support this email list: http://www.qsl.net/donate.html
> > Message delivered to d...@w3fpr.com
>
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Re: [Elecraft] K4 Delivery delay

[Henk Remijn PA5KT via Elecraft]

You might checkout this group:

https://groups.io/g/CreativeK4ShippingStatus/topics

You dont need to subscribe, you can just read the messages.

They owner has created a pretty good forecast on delivery.

Henk


Op 3-4-2022 om 20:29 schreef Pete Smith N4ZR:
You could add on "what options did you order?", since it's not hard to 
envision an option being held up by a missing components, and X many 
complete radios delayed while awaiting that option.


73, Pete N4ZR
Check out the new Reverse Beacon Network
web server at .
For spots, please use your favorite
"retail" DX cluster.

On 4/3/2022 12:42 PM, Julia Tuttle wrote:

Technically you did not ask any questions.

If I were in your shoes, I too would like some more transparency into
things, but I'm not sure "how many people are ahead of me in the 
queue" is
the right question -- I'd guess they build in batches and many delays 
are
less "there are 42 radios ahead of you" and more "we're waiting on 
this one

part for this board before we can finish and ship this batch of 50” or
perhaps "we're finishing this batch of 50 and then we have two more 
batches

and then yours but also parts availability is a crapshoot".

In any case, I wish you a speedy delivery, and Elecraft safe and healthy
employees and plentiful parts inventory.

73,

Julie

On Sun, Apr 3, 2022, 12:34 Sam Sargent via Elecraft <
elecraft@mailman.qth.net> wrote:


I readthe Elecraft (EC) Digest regularly and find many articles
interesting, and someuseful.  The topic“K4 and Delivery Delays” has
appeared recently but I didn’t see anyone ask thequestions that are 
in my

mind.  I placedmy order for a K4D in December 2021 and paid the $1500
deposit.  I received an email acknowledgment from ECsaying that my 
order is
part of the group 3. The EC web site indicates that all orders for 
K4s in
group 1 and Group 2have been shipped, and that hams who are in Group 
3 have
received emails.  IMHO EC should provide more information tohams who 
have
ordered K4s, especially those of us who have invested theoptional 
$1500. I
believe that the ESD for the H4D that I ordered was lastprojected as 
June
or July 2022.  In thisday of digital communication, it does not seem 
like
too much to ask that ECprovide hams who have ponied up the $1500, 
receive
regular (monthly) updatesthat show how many orders are in the que 
ahead of

theirs, and an updatedEstimated Delivery date, and final cost.  I look
forward to a thoughtful answer to myquestions. N1OVA

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Re: [Elecraft] K4 Delivery delay

[Pete Smith N4ZR]

You could add on "what options did you order?", since it's not hard to 
envision an option being held up by a missing components, and X many 
complete radios delayed while awaiting that option.


73, Pete N4ZR
Check out the new Reverse Beacon Network
web server at .
For spots, please use your favorite
"retail" DX cluster.

On 4/3/2022 12:42 PM, Julia Tuttle wrote:

Technically you did not ask any questions.

If I were in your shoes, I too would like some more transparency into
things, but I'm not sure "how many people are ahead of me in the queue" is
the right question -- I'd guess they build in batches and many delays are
less "there are 42 radios ahead of you" and more "we're waiting on this one
part for this board before we can finish and ship this batch of 50” or
perhaps "we're finishing this batch of 50 and then we have two more batches
and then yours but also parts availability is a crapshoot".

In any case, I wish you a speedy delivery, and Elecraft safe and healthy
employees and plentiful parts inventory.

73,

Julie

On Sun, Apr 3, 2022, 12:34 Sam Sargent via Elecraft <
elecraft@mailman.qth.net> wrote:


I readthe Elecraft (EC) Digest regularly and find many articles
interesting, and someuseful.  The topic“K4 and Delivery Delays” has
appeared recently but I didn’t see anyone ask thequestions that are in my
mind.  I placedmy order for a K4D in December 2021 and paid the $1500
deposit.  I received an email acknowledgment from ECsaying that my order is
part of the group 3. The EC web site indicates that all orders for K4s in
group 1 and Group 2have been shipped, and that hams who are in Group 3 have
received emails.  IMHO EC should provide more information tohams who have
ordered K4s, especially those of us who have invested theoptional $1500. I
believe that the ESD for the H4D that I ordered was lastprojected as June
or July 2022.  In thisday of digital communication, it does not seem like
too much to ask that ECprovide hams who have ponied up the $1500, receive
regular (monthly) updatesthat show how many orders are in the que ahead of
theirs, and an updatedEstimated Delivery date, and final cost.  I look
forward to a thoughtful answer to myquestions. N1OVA

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Re: [Elecraft] K3 MCU download /

[Don Wilhelm]

Go to the manual and look up how to recover from that condition (Forcing 
a firmware download).
It on page 42 of my old manual under Firmware Updates, the page may have 
changed in newer manuals.

It is easy to do and does not have to  go to a repair facility.

73,
Don W3FPR

On 4/3/2022 1:37 PM, hp via Elecraft wrote:

Here is one line from an EA6 message about a K3 he just purchased .

Elecraft K3 is stuck at MCU LD and need to be sent to Italy to Elecraft 
Official Service to recover it.

Are there any tricks to recover without sending it to a service site ??

I have told him how to subscribe to the reflector and gave him a link to the 
archives
but maybe someone has a quick answer which I can forward to him .

Hank K7HP



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[Elecraft] K3 MCU download /

[hp via Elecraft]

Here is one line from an EA6 message about a K3 he just purchased . 

Elecraft K3 is stuck at MCU LD and need to be sent to Italy to Elecraft 
Official Service to recover it. 

Are there any tricks to recover without sending it to a service site ?? 

I have told him how to subscribe to the reflector and gave him a link to the 
archives 
but maybe someone has a quick answer which I can forward to him . 

Hank K7HP 



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Re: [Elecraft] K4 Delivery delay

[Julia Tuttle]

Technically you did not ask any questions.

If I were in your shoes, I too would like some more transparency into
things, but I'm not sure "how many people are ahead of me in the queue" is
the right question -- I'd guess they build in batches and many delays are
less "there are 42 radios ahead of you" and more "we're waiting on this one
part for this board before we can finish and ship this batch of 50” or
perhaps "we're finishing this batch of 50 and then we have two more batches
and then yours but also parts availability is a crapshoot".

In any case, I wish you a speedy delivery, and Elecraft safe and healthy
employees and plentiful parts inventory.

73,

Julie

On Sun, Apr 3, 2022, 12:34 Sam Sargent via Elecraft <
elecraft@mailman.qth.net> wrote:

>
> I readthe Elecraft (EC) Digest regularly and find many articles
> interesting, and someuseful.  The topic“K4 and Delivery Delays” has
> appeared recently but I didn’t see anyone ask thequestions that are in my
> mind.  I placedmy order for a K4D in December 2021 and paid the $1500
> deposit.  I received an email acknowledgment from ECsaying that my order is
> part of the group 3. The EC web site indicates that all orders for K4s in
> group 1 and Group 2have been shipped, and that hams who are in Group 3 have
> received emails.  IMHO EC should provide more information tohams who have
> ordered K4s, especially those of us who have invested theoptional $1500. I
> believe that the ESD for the H4D that I ordered was lastprojected as June
> or July 2022.  In thisday of digital communication, it does not seem like
> too much to ask that ECprovide hams who have ponied up the $1500, receive
> regular (monthly) updatesthat show how many orders are in the que ahead of
> theirs, and an updatedEstimated Delivery date, and final cost.  I look
> forward to a thoughtful answer to myquestions. N1OVA
>
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[Elecraft] K4 Delivery delay

[Sam Sargent via Elecraft]

I readthe Elecraft (EC) Digest regularly and find many articles interesting, 
and someuseful.  The topic“K4 and Delivery Delays” has appeared recently but I 
didn’t see anyone ask thequestions that are in my mind.  I placedmy order for a 
K4D in December 2021 and paid the $1500 deposit.  I received an email 
acknowledgment from ECsaying that my order is part of the group 3. The EC web 
site indicates that all orders for K4s in group 1 and Group 2have been shipped, 
and that hams who are in Group 3 have received emails.  IMHO EC should provide 
more information tohams who have ordered K4s, especially those of us who have 
invested theoptional $1500. I believe that the ESD for the H4D that I ordered 
was lastprojected as June or July 2022.  In thisday of digital communication, 
it does not seem like too much to ask that ECprovide hams who have ponied up 
the $1500, receive regular (monthly) updatesthat show how many orders are in 
the que ahead of theirs, and an updatedEstimated Delivery date, and final cost. 
 I look forward to a thoughtful answer to myquestions. N1OVA

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Re: [Elecraft] OT: KWM-380

[Ed W0YK]

Mine went back to the factory and was returned with no trouble found.73,Ed W0YK
 Original message From: "James F. Boehner, MD via Elecraft" 
 Date: 4/3/22  07:55  (GMT-08:00) To: 'Bill Tippett' 
, 'Elecraft Reflector'  
Subject: [Elecraft] OT:  KWM-380 I'm sorry you had so much trouble with your 
KWM-380.  My experience is quitethe opposite.  I did send mine to be completely 
refurbished and calibratedand it is easily the quality of my KWM-2A and more.  
Techs who work on theKWM-380 are listed on the Collins Collectors Association 
website.  I usedBob Struk KX6K.Sorry about the off-topic post.'73 de JIM 
N2ZZ-Original Message-From: elecraft-boun...@mailman.qth.net 
 OnBehalf Of Bill TippettSent: Sunday, April 
3, 2022 6:12 AMTo: Elecraft Reflector Subject: 
[Elecraft] KWM-380 (was K4 and Delivery Delays)W0YK wrote:The KWM-380 may have 
been a "hot radio" in some people's minds, but I canpersonally attest to the 
opposite.  I have one, along with a number ofKWM-2As and S-Lines.  The 380 is a 
horrible performer.  The receiver isincredibly noisy, obstructing reception of 
all but the loudest signals.The audio is distorted and filtering is poor.  
Collins' last hurrah was adud.Hi Ed,I don't recall ever telling you this but 
your 380 also had horrible TX phasenoise. In the early 80s, we were located 
within 5 miles of each other in CO,both running amps. Whenever you transmitted 
on 80 or 160, the phase noisewould cover the entire CW bands. I don't recall 
what you replaced the380 with but I was a very happy camper when you did!I take 
pride that my KSYN3A-updated K3 is still one of the cleanest CWsignals on the 
bands.73, Bill W4ZV 
(ex-W0ZV)__Elecraft 
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Re: [Elecraft] OT: KWM-380

[Frank Krozel]

Exline, Jim Warner also does perfect work on them.

He has the exact Collins tune-up fixtures!

(641) 856-7772‬

j...@exlinesignal.com



I have no financial ties to Exline.
-73-  FrankKG9H
kg9hfr...@gmail.com




> On Apr 3, 2022, at 9:53 AM, James F. Boehner, MD via Elecraft 
>  wrote:
> 
> I'm sorry you had so much trouble with your KWM-380.  My experience is quite
> the opposite.  I did send mine to be completely refurbished and calibrated
> and it is easily the quality of my KWM-2A and more.  Techs who work on the
> KWM-380 are listed on the Collins Collectors Association website.  I used
> Bob Struk KX6K.
> 
> Sorry about the off-topic post.
> 
> '73 de JIM N2ZZ
> 
> -Original Message-
> From: elecraft-boun...@mailman.qth.net  On
> Behalf Of Bill Tippett
> Sent: Sunday, April 3, 2022 6:12 AM
> To: Elecraft Reflector 
> Subject: [Elecraft] KWM-380 (was K4 and Delivery Delays)
> 
> W0YK wrote:
> The KWM-380 may have been a "hot radio" in some people's minds, but I can
> personally attest to the opposite.  I have one, along with a number of
> KWM-2As and S-Lines.  The 380 is a horrible performer.  The receiver is
> incredibly noisy, obstructing reception of all but the loudest signals.
> The audio is distorted and filtering is poor.  Collins' last hurrah was a
> dud.
> 
> Hi Ed,
> 
> I don't recall ever telling you this but your 380 also had horrible TX phase
> noise. In the early 80s, we were located within 5 miles of each other in CO,
> both running amps. Whenever you transmitted on 80 or 160, the phase noise
> would cover the entire CW bands. I don't recall what you replaced the
> 380 with but I was a very happy camper when you did!
> 
> I take pride that my KSYN3A-updated K3 is still one of the cleanest CW
> signals on the bands.
> 
> 73, Bill W4ZV (ex-W0ZV)
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> delivered to jboehne...@yahoo.com 
> 
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[Elecraft] OT: KWM-380

[James F. Boehner, MD via Elecraft]

I'm sorry you had so much trouble with your KWM-380.  My experience is quite
the opposite.  I did send mine to be completely refurbished and calibrated
and it is easily the quality of my KWM-2A and more.  Techs who work on the
KWM-380 are listed on the Collins Collectors Association website.  I used
Bob Struk KX6K.

Sorry about the off-topic post.

'73 de JIM N2ZZ

-Original Message-
From: elecraft-boun...@mailman.qth.net  On
Behalf Of Bill Tippett
Sent: Sunday, April 3, 2022 6:12 AM
To: Elecraft Reflector 
Subject: [Elecraft] KWM-380 (was K4 and Delivery Delays)

W0YK wrote:
The KWM-380 may have been a "hot radio" in some people's minds, but I can
personally attest to the opposite.  I have one, along with a number of
KWM-2As and S-Lines.  The 380 is a horrible performer.  The receiver is
incredibly noisy, obstructing reception of all but the loudest signals.
The audio is distorted and filtering is poor.  Collins' last hurrah was a
dud.

Hi Ed,

I don't recall ever telling you this but your 380 also had horrible TX phase
noise. In the early 80s, we were located within 5 miles of each other in CO,
both running amps. Whenever you transmitted on 80 or 160, the phase noise
would cover the entire CW bands. I don't recall what you replaced the
380 with but I was a very happy camper when you did!

I take pride that my KSYN3A-updated K3 is still one of the cleanest CW
signals on the bands.

73, Bill W4ZV (ex-W0ZV)
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delivered to jboehne...@yahoo.com 

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[Elecraft] K3, P3 and K.Pod for sale

[edauer]

The K3, P3, and K-Pod have been sold.  Thanks to all for your expressions of
interest.

 

 

Ted, KN1CBR

 

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[Elecraft] Field Use of the Elecraft KX2

[Michael Parsons]

Hi all,

Just recently subscribed to the mailing list and wanted to drop a quick note. I 
got my Elecraft KX2 off of a ham from the Washington state area last summer and 
it has been an excellent addition to my operations. 

I’ve done 12 Summits On The Air activations and over 65 Parks On The Air 
activations in 10 different states since getting the KX2. I’ve used the AX1 
antenna and the AXE 40m extension as well as a PackTenna Mini 9:1 EFRW for most 
of them. 

I just started doing some antenna reviews for MFJ as well and have had both 
issues and successes with them all. 

I will include a link to my Ham Radio YouTube channel where I post all of those 
videos.

Thanks and 73, 

Mike (K0FYR)
Ham-Solo
YouTube Channel: https://youtube.com/channel/UCbfKAB3z7-RjEcvvWusyq-g
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Re: [Elecraft] KWM-380 (was K4 and Delivery Delays)

[Ed W0YK]

I'm not surprised.  The receiver is chock full of internally generated birdies. 
 On a dead band, a bandscope looks like a major contest!73,Ed W0YK
 Original message From: Bill Tippett  
Date: 4/3/22  03:12  (GMT-08:00) To: Elecraft Reflector 
 Cc: e...@w0yk.com Subject: KWM-380 (was [Elecraft] 
K4 and Delivery Delays) W0YK wrote:The KWM-380 may have been a "hot radio" in 
some people's minds, but I can personally attest to the opposite.  I have one, 
along with a number of KWM-2As and S-Lines.  The 380 is a horrible performer.  
The receiver is incredibly noisy, obstructing reception of all but the loudest 
signals.  The audio is distorted and filtering is poor.  Collins' last hurrah 
was a dud.Hi Ed, I don't recall ever telling you this but your 380 also had 
horrible TX phase noise.  In the early 80s, we were located within 5 miles of 
each other in CO, both running amps.  Whenever you transmitted on 80 or 160, 
the phase noise would cover the entire CW bands.  I don't recall what you 
replaced the 380 with but I was a very happy camper when you did!I take pride 
that my KSYN3A-updated K3 is still one of the cleanest CW signals on the 
bands.73,  Bill  W4ZV  (ex-W0ZV)
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Re: [Elecraft] KPA500 Issue

[David Woolley]

Key clicks don't require non-linearity.  They are the result of 
modulating with a signal that has an infinite bandwidth, because of the 
sharp transitions at leading and trailing edges.  That results in 
infinite side bands.  (Actually any signal that communicates information 
in finite time will have infinite side bands, but by correct shaping you 
can make them very small.)


--
David Woolley
Owner K2 06123.


On 01/04/2022 23:06, Jim Brown wrote:

On 4/1/2022 2:35 PM, kevin wrote:

It is more accurately referenced as Discontinuous Wave.


Actually, it is 100% amplitude modulation of a carrier by a rectangular 
wave train. That modulation excites non-linearity in the transmitter 
signal chain and produce intermodulation distortion that is heard as 
clicks.



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[Elecraft] KWM-380 (was K4 and Delivery Delays)

[Bill Tippett]

W0YK wrote:
The KWM-380 may have been a "hot radio" in some people's minds, but I can
personally attest to the opposite.  I have one, along with a number of
KWM-2As and S-Lines.  The 380 is a horrible performer.  The receiver is
incredibly noisy, obstructing reception of all but the loudest signals.
The audio is distorted and filtering is poor.  Collins' last hurrah was a
dud.

Hi Ed,

I don't recall ever telling you this but your 380 also had horrible TX
phase noise. In the early 80s, we were located within 5 miles of each other
in CO, both running amps. Whenever you transmitted on 80 or 160, the phase
noise would cover the entire CW bands. I don't recall what you replaced the
380 with but I was a very happy camper when you did!

I take pride that my KSYN3A-updated K3 is still one of the cleanest CW
signals on the bands.

73, Bill W4ZV (ex-W0ZV)
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