Re: [Elecraft] Sub Receiver Questions

[Bob Wilson, N6TV]

On Mar 27, 2017 7:22 PM, "wa9fvp"  wrote:

While receiving on 20 meters, for example, on the main Receiver, can I
receive another band using the Sub-Receiver connected to the Receiver In
port?


If CONFIG:VFO IND is set to YES, use the AUX port for the SubRx antenna
instead of RX ANT IN.  The SUB can listen to MAIN's antenna (Transmit Ant
or RX Ant) or to AUX.

From the K3 Owner's Manual:

"Sub Receiver Band Independence

"If CONFIG:VFO IND is set to YES, you can set
the sub receiver to a different band from main.
Hold BSET, then tap BAND up/down to select the
sub receiver’s band. If you only use band-
independence for the sub occasionally, you may
want to assign VFO IND to a programmable
function switch (pg. 21).

"If the two receivers are sharing the main
antenna path, putting the sub receiver on a
higher-frequency band than main may result in
signal loss in the sub. This is due to sharing of the
main receiver’s low-pass filters. If you select an
incompatible band combination, the K3 briefly
displays USE AUX as a warning. To avoid sub
receiver signal loss, use the sub’s AUX input."

With SUB active, hold down RX ANT to toggle the Sub RX antenna between MAIN
and AUX.

I understand that the Sub receiver's audio is fed to the other stereo
channel but is that true for the Line Out port?  Can the Sub-Receiver feed
audio via the USB CODAC?


Yes.  When SUB is enabled, SUB audio should be fed to the Right audio
channel of both LINE OUT and the USB Audio CODEC.

73,
Bob, N6TV
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Re: [Elecraft] K3/K3s; Digital modes, specifically DV

[Matthew Cook]

I'd wait until David VK5DGR gets the FreeDV bit rate lower which will
improve the Eb/n0 requirements and bring the performance closer to that of
SSB.  If you're not already following along on David's blog it's worth a
read (http://www.rowetel.com/) his writing style is easy going and he
explains things well.

His current work on Codec2 700C surpassing MELP 600 in performance along
with some new modem ideas will push the limits of what's possible with
Digital voice on HF.  It will not be long and the performance of FreeDV
will be equal too if not surpass SSB on a standard HF channel.  Yes this
can be done already, however you do end up sounding like donald duck and a
bit robotic for my liking on current technology.  The work on Codec2 will
change this.

While the FreeDV code base (Modem + Codec2) is open source the integration
work is not insignificant.  The current FreeDV codebase in the SM1000 runs
on a STM32V405xxx 32-bit ARM core clocked at 168MHz with a real FPU and no
RTOS it runs bare metal.  That is some serious beans in terms of DSP
processing !!!  The effort involved in bringing this into any product
should not be underestimated, there is still some very serious work to do
which results in $$$ spent.

While FreeDV is under active development interfacing a linux based laptop
to the K3 and using this to keep up with the Jones's is perhaps the best
course of action.  Those with the K3s are already ahead of those with a
stock K3 since they already have the internal USB sound card.  However
making cables for laptops and PTT cct's isn't hard either.

Once the performance of FreeDV surpasses that of standard SSB then would it
be time for internal integration work to begin.  I'm fingers crossed that
the processors and DSP in the next iteration of the K-line will have enough
processing beans to "answer the meaning of life the universe and
everything" in real time.  As David tells me on the local repeater most
mornings "MIPS are cheap".  That is about the time frame I'd expect both of
these technologies to collide.

YMMV.

73

Matthew
VK5ZM

On 28 March 2017 at 04:40, Richard Fjeld  wrote:

> Greetings to all,
>
> The K3/K3s is an excellent radio for digital modes due to the ease of
> interfacing with a computer if desired.  A computer is not even needed
> for some digital modes, and I have tried that successfully.
>
> I have mentioned in the past that I had tried the free software for
> digital voice on HF called 'FreeDV'.  I had worked a Canadian ham a few
> times using it and he has been keeping in contact with me via email
> encouraging me to get back into it.  I am starting to get up to date
> again, and I found accurate reviews of it on
> http://www.eham.net/reviews/detail/11016   by K2RWF and WA0TPN.  I think
> you will find the reviews interesting and informative.
>
> Notice that the reviews seem to be either at, or near, 5/5 or 0/5. I
> think both of the reviews I mentioned answer why that is.  I will keep
> my experience mute and let you glean aye/nay from the reviews. Whether
> you approve of digital voice or not, the K3/K3s is a natural for using
> it, and it's fun.  (As always with digital modes, be kind to your finals.)
>
> FYI,
> Dick, n0ce
>
>
> --
>
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Re: [Elecraft] For Sale: Elecraft K2

[Harry Yingst via Elecraft]

It's a very nice radio and I've enjoyed building it.
I built and sold my last one years ago, so I  wanted another.
I would like to see Elecraft make some more full kit radios.




 Original message 
From: Robert G Strickland  
Date: 2017-03-27  11:16 PM  (GMT-05:00) 
To: elecraft@mailman.qth.net 
Subject: Re: [Elecraft] For Sale: Elecraft K2 

Money well spent, imho.

...robert

On 03/28/2017 03:02, Harry Yingst via Elecraft wrote:
> I should have said a great deal. I just spent about 1600 on my k2.
> I didn't go with the amp but added the tuner, battery, ssb, af filter, noise 
> blanker, etc.
>
>
>
>  Original message 
> From: Jim Allen 
> Date: 2017-03-27  9:57 PM  (GMT-05:00)
> To: elecraft@mailman.qth.net
> Subject: Re: [Elecraft] For Sale: Elecraft K2
>

-- 
Robert G Strickland, PhD ABPH - KE2WY
rc...@verizon.net.usa
Syracuse, New York, USA
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Re: [Elecraft] For Sale: Elecraft K2

[Harry Yingst via Elecraft]

What I run into is I enjoy building more than operating. So once I build them 
they tend to not get used much. 
My KX3 sat covered for nearly a year before I sent it to my son (permanent 
loan).
I built the K2 becuse I wanted a rig I could tinker and mod and enjoy longer.

 Original message 
From: Matthew Cook  
Date: 2017-03-27  11:07 PM  (GMT-05:00) 
To: Jim Allen  
Cc: Elecraft Reflector  
Subject: Re: [Elecraft] For Sale: Elecraft K2 

Yes and we'd also buy them too if we could find people willing to send them
to VK !

Sigh.

73

Matthew
VK5ZM

On 28 March 2017 at 12:27, Jim Allen  wrote:

> Pretty good deal?  The new stuff would cost you $1660, and you still have
> to build it!
>
> If I didn't already have two, I'd be all over it.  I wish he would ask
> more, but it's his to do with as he likes.
>
> 73 Jim Allen W6OGC
>
>
> > That's actually a pretty good deal. I've just built a K2 and the base
> radio alone cost more than what you are selling yours for
> >
> Sent from my iPad
> __
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Re: [Elecraft] For Sale: Elecraft K2

[Robert G Strickland]

Money well spent, imho.

...robert

On 03/28/2017 03:02, Harry Yingst via Elecraft wrote:

I should have said a great deal. I just spent about 1600 on my k2.
I didn't go with the amp but added the tuner, battery, ssb, af filter, noise 
blanker, etc.



 Original message 
From: Jim Allen 
Date: 2017-03-27  9:57 PM  (GMT-05:00)
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] For Sale: Elecraft K2



--
Robert G Strickland, PhD ABPH - KE2WY
rc...@verizon.net.usa
Syracuse, New York, USA
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Re: [Elecraft] For Sale: Elecraft K2

[Matthew Cook]

Yes and we'd also buy them too if we could find people willing to send them
to VK !

Sigh.

73

Matthew
VK5ZM

On 28 March 2017 at 12:27, Jim Allen  wrote:

> Pretty good deal?  The new stuff would cost you $1660, and you still have
> to build it!
>
> If I didn't already have two, I'd be all over it.  I wish he would ask
> more, but it's his to do with as he likes.
>
> 73 Jim Allen W6OGC
>
>
> > That's actually a pretty good deal. I've just built a K2 and the base
> radio alone cost more than what you are selling yours for
> >
> Sent from my iPad
> __
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Re: [Elecraft] KX2 ATU question

[Harry Yingst via Elecraft]

I have the T1 and the KAT2 fot the K2  the KAT2 seems to also be a better tuner.
But the T1 is still a good tuner.



 Original message 
From: Mike Morrow  
Date: 2017-03-27  9:53 PM  (GMT-05:00) 
To: Elecraft Reflector  
Subject: Re: [Elecraft] KX2 ATU question 

A tabular summary of the various Elecraft ATU characteristics was made by me 
here on 24 May 2016.  Next is the posting with the tabulation, attached below a 
response from Wayne with important KXAT2 design remarks, compared to the T1:
 
  http://mailman.qth.net/pipermail/elecraft/2016-May/232436.html

In summary, both the KXAT2 and the T1 ATUs use 7 inductors and 7 capacitors in 
an L-network low-pass filter, where the capacitor array may be switched to 
either side of the inductor array.  That gives 32764 unique configurations for 
both ATUs.  However, the T1 must use those 32764 between 160m and 6m, while the 
KXAT2 uses its 32764 between 80m and 10m only.  Thus, within the KXAT2's 
reduced frequency range, it performs more precisely to generate a match, 
compared to the T1 between 80m and 10m.

Bottom line:  The KXAT2 is superior to the T1 over the KX2's operating 
frequency range.

Mike / KK5F

-Original Message-
>From: w7aqk 
>
>A while back, some enterprising person had posted a rather nice summary of 
>all the Elecraft ATU's showing numbers of tuning combinations, etc.  I can't 
>find it now, but maybe someone can post it again.  It may have been here on 
>this reflector, or otherwise, on the KX3 reflector.
>
>As I recall, the KX2 ATU had slightly fewer combinations, but only because 
>160 and 6 meters were not included on the rig.  Thus it was deemed to 
>perform nearly identically to the K3 and KX3 ATU's, and seems to do that 
>based on my usage.
>
>The T1 also had fewer combinations than the K3, but I think shows very 
>similar to the KX2.  My guess is that you would find the KX2 ATU to do a 
>competent job in comparison to the T1.  It is a very worthy addition to the 
>rig.
>
>Dave W7AQK
>
>From: Dave Fugleberg 
>
>How does the optional internal ATU for the KX2 compare to the Elecraft T1
>ATU in terms of tuning range? In other words, if a given length of wire
>works well with the T1, can one expect it to work with the KX2 internal
>tuner?
>
>I have a T1, but not a KX2 (at least not yet).
>Is  it  a similar design?
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Re: [Elecraft] For Sale: Elecraft K2

[Harry Yingst via Elecraft]

I should have said a great deal. I just spent about 1600 on my k2.
I didn't go with the amp but added the tuner, battery, ssb, af filter, noise 
blanker, etc.



 Original message 
From: Jim Allen  
Date: 2017-03-27  9:57 PM  (GMT-05:00) 
To: elecraft@mailman.qth.net 
Subject: Re: [Elecraft] For Sale: Elecraft K2 

Pretty good deal?  The new stuff would cost you $1660, and you still have to 
build it!

If I didn't already have two, I'd be all over it.  I wish he would ask more, 
but it's his to do with as he likes.

73 Jim Allen W6OGC 


> That's actually a pretty good deal. I've just built a K2 and the base radio 
> alone cost more than what you are selling yours for
> 
Sent from my iPad
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Re: [Elecraft] K3/K3s; Digital modes, specifically DV

[Harry Yingst via Elecraft]

The mcHF is nice but it is still a work in progress.
But it does show what can be done.



 Original message 
From: Bob Nielsen  
Date: 2017-03-27  10:46 PM  (GMT-05:00) 
To: Harry Yingst , Elecraft Reflector 
 
Subject: Re: [Elecraft] K3/K3s; Digital modes, specifically DV 


The more I look at the mcHF, the more impressed I become.  Once I
  get caught up with my current projects I'll seriously consider
  getting one.  


The FreeDV code and more importantly Codec2 are indeed open
  source.  I don't know how much room there is in the K3/KX3/KX2
  firmware to add something like this but if possible, it would be
  quite useful in getting more FreeDV activity going.  in the
  meantime, I'll make up some cables to connect my KX2 to my SM1000
  and give it a try.
Bob, N7XY




On 3/27/17 6:54 PM, Harry Yingst wrote:



  

There is a different
group working on the firmware now  
http://df8oe.github.io/mchf-github/ 


  



As I understand it the
  FreeDV code is open source so Elecraft would not need to
  reinvent the wheel.








  



  

   
   From:
  Bob Nielsen 

  To:
  Harry Yingst  

  Sent:
  Monday, March 27, 2017 9:49 PM

  Subject:
  Re: [Elecraft] K3/K3s; Digital modes, specifically DV

 
  


  
Strangely
  the mcHF website doesn't seem to mention it but
  that's great.  





  On 3/27/17
6:15 PM, Harry Yingst wrote:

  
  

  The
mcHF does indeed have FreeDV built in RX and
TX (I'm looking right at it)

  
  

  
  I'm
running ver 1.5.7 of the firmware (Ia little
old as I have not updated it recently)
  

  
  

  
  



  
  

  

   
   From:
  Bob Nielsen 

  To:
  elecraft@mailman.qth.net
  

  Sent:
  Monday, March 27, 2017 7:13 PM

  Subject:
  Re: [Elecraft] K3/K3s; Digital modes,
  specifically DV




  While
the mcHF has some digital audio
circuitry, I don't believe it 

provides a digital voice mode.



FreeDV is a very narrow-band (1.1
kHz) digital voice mode using the 

open-source Codec2, developed by
VK5DGR.  One can run FreeDV without
a 

computer using the Rowetel SM1000
adapter 


(https://www.tindie.com/products/edwin/sm1000-freedv-adpapter/).
This 

should work nicely with a KX2 or KX3
for portable FreeDV operation.  I 

haven't tried doing that but it
looks fairly straightforward.



Bob, N7XY





  On 3/27/17 2:28 PM, Harry Yingst
  via Elecraft wrote:

  >  I would like to see Elecraft
  

Re: [Elecraft] K3/K3s; Digital modes, specifically DV

[Bob Nielsen]

The more I look at the mcHF, the more impressed I become.  Once I get 
caught up with my current projects I'll seriously consider getting one.


The FreeDV code and more importantly Codec2 are indeed open source.  I 
don't know how much room there is in the K3/KX3/KX2 firmware to add 
something like this but if possible, it would be quite useful in getting 
more FreeDV activity going.  in the meantime, I'll make up some cables 
to connect my KX2 to my SM1000 and give it a try.


Bob, N7XY


On 3/27/17 6:54 PM, Harry Yingst wrote:
There is a different group working on the firmware now 
http://df8oe.github.io/mchf-github/



As I understand it the FreeDV code is open source so Elecraft would 
not need to reinvent the wheel.






*From:* Bob Nielsen 
*To:* Harry Yingst 
*Sent:* Monday, March 27, 2017 9:49 PM
*Subject:* Re: [Elecraft] K3/K3s; Digital modes, specifically DV

Strangely the mcHF website doesn't seem to mention it but that's great.

On 3/27/17 6:15 PM, Harry Yingst wrote:
The mcHF does indeed have FreeDV built in RX and TX (I'm looking 
right at it)


I'm running ver 1.5.7 of the firmware (Ia little old as I have not 
updated it recently)






*From:* Bob Nielsen  
*To:* elecraft@mailman.qth.net 
*Sent:* Monday, March 27, 2017 7:13 PM
*Subject:* Re: [Elecraft] K3/K3s; Digital modes, specifically DV

While the mcHF has some digital audio circuitry, I don't believe it
provides a digital voice mode.

FreeDV is a very narrow-band (1.1 kHz) digital voice mode using the
open-source Codec2, developed by VK5DGR.  One can run FreeDV without a
computer using the Rowetel SM1000 adapter
(https://www.tindie.com/products/edwin/sm1000-freedv-adpapter/). This
should work nicely with a KX2 or KX3 for portable FreeDV operation.  I
haven't tried doing that but it looks fairly straightforward.

Bob, N7XY


On 3/27/17 2:28 PM, Harry Yingst via Elecraft wrote:
>  I would like to see Elecraft built it into their firmware.
> I have a mcHF QRP radio that has Digital Voice in it
>
>From: Richard Fjeld >
>  To: Elecraft Reflector >

>  Sent: Monday, March 27, 2017 2:13 PM
>  Subject: [Elecraft] K3/K3s; Digital modes, specifically DV
>
> Greetings to all,
>
> The K3/K3s is an excellent radio for digital modes due to the ease of
> interfacing with a computer if desired.  A computer is not even needed
> for some digital modes, and I have tried that successfully.
>
> I have mentioned in the past that I had tried the free software for
> digital voice on HF called 'FreeDV'.  I had worked a Canadian ham a few
> times using it and he has been keeping in contact with me via email
> encouraging me to get back into it.  I am starting to get up to date
> again, and I found accurate reviews of it on
> http://www.eham.net/reviews/detail/11016   by K2RWF and WA0TPN.  I 
think

> you will find the reviews interesting and informative.
>
> Notice that the reviews seem to be either at, or near, 5/5 or 0/5. I
> think both of the reviews I mentioned answer why that is.  I will keep
> my experience mute and let you glean aye/nay from the reviews. Whether
> you approve of digital voice or not, the K3/K3s is a natural for using
> it, and it's fun.  (As always with digital modes, be kind to your 
finals.)

>
> FYI,
> Dick, n0ce
>
>

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Re: [Elecraft] For Sale: Elecraft K2

[David Inger]

K2 has been SOLD.  Thanks to all those who were interested.
 
73 de K6SBA

  _  

From: David Inger [mailto:ingerassocia...@cox.net] 
Sent: Monday, March 27, 2017 7:57 AM
To: 'Elecraft@mailman.qth.net'
Subject: RE: For Sale: Elecraft K2

 
After much hand-wringing, I've decided to sell my 100-W K2.  The radio is in
excellent condition, both operationally and cosmetically.  I sent it back to
Don Wilhelm last summer for a "tune-up" and alignment.  Don's report stated
that the radio met or exceeded factory specs (documentation provided to new
owner).
 
The serial number is 31XX, so it is a Rev "B" version which meets current
production.  I am the second owner and I installed most options, including
the 100-watt module.  The radio includes:
KNB2 - Noise Blanker board
KSB2 - SSB board
KIOS2 - Serial Interface (with radio-to-computer cable)
KAF2 - Audio Filter and Realtime Clock
Kenwood MC-43S hand mic
All construction and operators manuals.
 
I love this radio, but I have to let go of some things.  After all these
years, the performance of the K2 is still top shelf; if I can hear it / work
it on my K3, I can do it on my K2.
 
My firm price for the all of the above is $650 including Priority Mail
shipping to any US ZIP code.  If you are anywhere near Santa Barbara, CA, I
would be happy to demo the radio.
 
I do have pictures and, yes, I take PayPal.
 
73 de K6SBA
David Inger
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[Elecraft] Sub Receiver Questions

[wa9fvp]

While receiving on 20 meters, for example, on the main Receiver, can I
receive another band using the Sub-Receiver connected to the Receiver In
port?  I understand that the Sub receiver's audio is fed to the other stereo
channel but is that true for the Line Out port?  Can the Sub-Receiver feed
audio via the USB CODAC? 



-
Jack WA9FVP

Sent from my home-brew I5 Core PC
--
View this message in context: 
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Re: [Elecraft] K3/K3s; Digital modes, specifically DV

[Harry Yingst via Elecraft]

There is a different group working on the firmware now  
http://df8oe.github.io/mchf-github/ 

As I understand it the FreeDV code is open source so Elecraft would not need to 
reinvent the wheel.



  From: Bob Nielsen 
 To: Harry Yingst  
 Sent: Monday, March 27, 2017 9:49 PM
 Subject: Re: [Elecraft] K3/K3s; Digital modes, specifically DV
   
 Strangely the mcHF website doesn't seem to mention it but that's great.  
  
 On 3/27/17 6:15 PM, Harry Yingst wrote:
  
  The mcHF does indeed have FreeDV built in RX and TX (I'm looking right at it)
  
  I'm running ver 1.5.7 of the firmware (Ia little old as I have not updated it 
recently) 
  
  
 
From: Bob Nielsen 
 To: elecraft@mailman.qth.net 
 Sent: Monday, March 27, 2017 7:13 PM
 Subject: Re: [Elecraft] K3/K3s; Digital modes, specifically DV
  
 While the mcHF has some digital audio circuitry, I don't believe it 
 provides a digital voice mode.
 
 FreeDV is a very narrow-band (1.1 kHz) digital voice mode using the 
 open-source Codec2, developed by VK5DGR.  One can run FreeDV without a 
 computer using the Rowetel SM1000 adapter 
 (https://www.tindie.com/products/edwin/sm1000-freedv-adpapter/). This 
 should work nicely with a KX2 or KX3 for portable FreeDV operation.  I 
 haven't tried doing that but it looks fairly straightforward.
 
 Bob, N7XY
 
 
 On 3/27/17 2:28 PM, Harry Yingst via Elecraft wrote:
 >  I would like to see Elecraft built it into their firmware.
 > I have a mcHF QRP radio that has Digital Voice in it
 >
 >        From: Richard Fjeld 
 >  To: Elecraft Reflector 
 >  Sent: Monday, March 27, 2017 2:13 PM
 >  Subject: [Elecraft] K3/K3s; Digital modes, specifically DV
 >    
 > Greetings to all,
 >
 > The K3/K3s is an excellent radio for digital modes due to the ease of
 > interfacing with a computer if desired.  A computer is not even needed
 > for some digital modes, and I have tried that successfully.
 >
 > I have mentioned in the past that I had tried the free software for
 > digital voice on HF called 'FreeDV'.  I had worked a Canadian ham a few
 > times using it and he has been keeping in contact with me via email
 > encouraging me to get back into it.  I am starting to get up to date
 > again, and I found accurate reviews of it on
 > http://www.eham.net/reviews/detail/11016   by K2RWF and WA0TPN.  I think
 > you will find the reviews interesting and informative.
 >
 > Notice that the reviews seem to be either at, or near, 5/5 or 0/5. I
 > think both of the reviews I mentioned answer why that is.  I will keep
 > my experience mute and let you glean aye/nay from the reviews. Whether
 > you approve of digital voice or not, the K3/K3s is a natural for using
 > it, and it's fun.  (As always with digital modes, be kind to your finals.)
 >
 > FYI,
 > Dick, n0ce
 >
 >
 
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Re: [Elecraft] For Sale: Elecraft K2

[Jim Allen]

Pretty good deal?  The new stuff would cost you $1660, and you still have to 
build it!

If I didn't already have two, I'd be all over it.  I wish he would ask more, 
but it's his to do with as he likes.

73 Jim Allen W6OGC 


> That's actually a pretty good deal. I've just built a K2 and the base radio 
> alone cost more than what you are selling yours for
> 
Sent from my iPad
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Re: [Elecraft] KX2 ATU question

[Mike Morrow]

A tabular summary of the various Elecraft ATU characteristics was made by me 
here on 24 May 2016.  Next is the posting with the tabulation, attached below a 
response from Wayne with important KXAT2 design remarks, compared to the T1:
 
  http://mailman.qth.net/pipermail/elecraft/2016-May/232436.html

In summary, both the KXAT2 and the T1 ATUs use 7 inductors and 7 capacitors in 
an L-network low-pass filter, where the capacitor array may be switched to 
either side of the inductor array.  That gives 32764 unique configurations for 
both ATUs.  However, the T1 must use those 32764 between 160m and 6m, while the 
KXAT2 uses its 32764 between 80m and 10m only.  Thus, within the KXAT2's 
reduced frequency range, it performs more precisely to generate a match, 
compared to the T1 between 80m and 10m.

Bottom line:  The KXAT2 is superior to the T1 over the KX2's operating 
frequency range.

Mike / KK5F

-Original Message-
>From: w7aqk 
>
>A while back, some enterprising person had posted a rather nice summary of 
>all the Elecraft ATU's showing numbers of tuning combinations, etc.  I can't 
>find it now, but maybe someone can post it again.  It may have been here on 
>this reflector, or otherwise, on the KX3 reflector.
>
>As I recall, the KX2 ATU had slightly fewer combinations, but only because 
>160 and 6 meters were not included on the rig.  Thus it was deemed to 
>perform nearly identically to the K3 and KX3 ATU's, and seems to do that 
>based on my usage.
>
>The T1 also had fewer combinations than the K3, but I think shows very 
>similar to the KX2.  My guess is that you would find the KX2 ATU to do a 
>competent job in comparison to the T1.  It is a very worthy addition to the 
>rig.
>
>Dave W7AQK
>
>From: Dave Fugleberg 
>
>How does the optional internal ATU for the KX2 compare to the Elecraft T1
>ATU in terms of tuning range? In other words, if a given length of wire
>works well with the T1, can one expect it to work with the KX2 internal
>tuner?
>
>I have a T1, but not a KX2 (at least not yet).
>Is  it  a similar design?
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Re: [Elecraft] K3S Power Issue

[Harry Yingst via Elecraft]

I second that recommendation, It's a nice dummy load.




  From: Walter Underwood 
 To: Elecraft Reflector  
 Sent: Monday, March 27, 2017 9:40 PM
 Subject: Re: [Elecraft] K3S Power Issue
   
If you don’t have a 100 W dummy load, I recommend this one. For $40 and an hour 
or so of soldering, you’ll have one. I built this just before assembling my 
KXPA100.

http://www.ohr.com/rfl100.htm 

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

> On Mar 27, 2017, at 5:39 PM, Edward R Cole  wrote:
> 
> Normally, I do not respond to most of these issues; Don is an expert and 
> gives great advice.
> 
> What you last wrote shows that you NEED to do a TX Gain Calibration.  Your 
> external power meter shows full output, so the K3s meter ckts need to be 
> re-calibrated to agree with the ext. meter reading (assuming you trust the 
> external meter).
> 
> Be sure that you use a 50-ohm non-reactive load (translation: a good dummy 
> load).  If you measure into an antenna with any SWR > 1.05 the output power 
> will not read accurately.  Power meters (SWR meters) are actually RF 
> voltmeters and require a "perfect" 50-ohms to read correctly.
> 
> GL sounds like you are close to "fixing" your issues.
> 
> 73, Ed - KL7UW
> 
> Date: Mon, 27 Mar 2017 14:17:24 -0700 (MST)
> From: Serge_VA3SB 
> To: elecraft@mailman.qth.net
> Subject: Re: [Elecraft] K3S Power Issue
> 
>  Thank you very much for your prompt response Don. 
>  I have conducted a couple of additional tests and with an external power 
>meter, even though the K3S indicates a power output of 75-80W, my external 
>meter shows a power output of 100W. 
>  I will tighten all of the connections and my try some other cables as I only 
>have the equipment connected on my desktop in the interim. 
>  Thanks again for your assistance.
>  73
>  Serge
>  VA3SB
> 
> 
> 73, Ed - KL7UW
>  http://www.kl7uw.com
> Dubus-NA Business mail:
>  dubus...@gmail.com 
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Re: [Elecraft] K3/K3s; Digital modes, specifically DV

[Harry Yingst via Elecraft]

The mcHF does indeed have FreeDV built in RX and TX (I'm looking right at it)

I'm running ver 1.5.7 of the firmware (Ia little old as I have not updated it 
recently)



  From: Bob Nielsen 
 To: elecraft@mailman.qth.net 
 Sent: Monday, March 27, 2017 7:13 PM
 Subject: Re: [Elecraft] K3/K3s; Digital modes, specifically DV
   
While the mcHF has some digital audio circuitry, I don't believe it 
provides a digital voice mode.

FreeDV is a very narrow-band (1.1 kHz) digital voice mode using the 
open-source Codec2, developed by VK5DGR.  One can run FreeDV without a 
computer using the Rowetel SM1000 adapter 
(https://www.tindie.com/products/edwin/sm1000-freedv-adpapter/). This 
should work nicely with a KX2 or KX3 for portable FreeDV operation.  I 
haven't tried doing that but it looks fairly straightforward.

Bob, N7XY


On 3/27/17 2:28 PM, Harry Yingst via Elecraft wrote:
>  I would like to see Elecraft built it into their firmware.
> I have a mcHF QRP radio that has Digital Voice in it
>
>        From: Richard Fjeld 
>  To: Elecraft Reflector 
>  Sent: Monday, March 27, 2017 2:13 PM
>  Subject: [Elecraft] K3/K3s; Digital modes, specifically DV
>    
> Greetings to all,
>
> The K3/K3s is an excellent radio for digital modes due to the ease of
> interfacing with a computer if desired.  A computer is not even needed
> for some digital modes, and I have tried that successfully.
>
> I have mentioned in the past that I had tried the free software for
> digital voice on HF called 'FreeDV'.  I had worked a Canadian ham a few
> times using it and he has been keeping in contact with me via email
> encouraging me to get back into it.  I am starting to get up to date
> again, and I found accurate reviews of it on
> http://www.eham.net/reviews/detail/11016   by K2RWF and WA0TPN.  I think
> you will find the reviews interesting and informative.
>
> Notice that the reviews seem to be either at, or near, 5/5 or 0/5. I
> think both of the reviews I mentioned answer why that is.  I will keep
> my experience mute and let you glean aye/nay from the reviews. Whether
> you approve of digital voice or not, the K3/K3s is a natural for using
> it, and it's fun.  (As always with digital modes, be kind to your finals.)
>
> FYI,
> Dick, n0ce
>
>

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Re: [Elecraft] K3S Power Issue

[Walter Underwood]

If you don’t have a 100 W dummy load, I recommend this one. For $40 and an hour 
or so of soldering, you’ll have one. I built this just before assembling my 
KXPA100.

http://www.ohr.com/rfl100.htm 

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

> On Mar 27, 2017, at 5:39 PM, Edward R Cole  wrote:
> 
> Normally, I do not respond to most of these issues; Don is an expert and 
> gives great advice.
> 
> What you last wrote shows that you NEED to do a TX Gain Calibration.  Your 
> external power meter shows full output, so the K3s meter ckts need to be 
> re-calibrated to agree with the ext. meter reading (assuming you trust the 
> external meter).
> 
> Be sure that you use a 50-ohm non-reactive load (translation: a good dummy 
> load).  If you measure into an antenna with any SWR > 1.05 the output power 
> will not read accurately.  Power meters (SWR meters) are actually RF 
> voltmeters and require a "perfect" 50-ohms to read correctly.
> 
> GL sounds like you are close to "fixing" your issues.
> 
> 73, Ed - KL7UW
> 
> Date: Mon, 27 Mar 2017 14:17:24 -0700 (MST)
> From: Serge_VA3SB 
> To: elecraft@mailman.qth.net
> Subject: Re: [Elecraft] K3S Power Issue
> 
>  Thank you very much for your prompt response Don.
>  I have conducted a couple of additional tests and with an external power 
> meter, even though the K3S indicates a power output of 75-80W, my external 
> meter shows a power output of 100W.
>  I will tighten all of the connections and my try some other cables as I only 
> have the equipment connected on my desktop in the interim.
>  Thanks again for your assistance.
>  73
>  Serge
>  VA3SB
> 
> 
> 73, Ed - KL7UW
>  http://www.kl7uw.com
> Dubus-NA Business mail:
>  dubus...@gmail.com 
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Re: [Elecraft] K3S Power Issue

[Edward R Cole]

Normally, I do not respond to most of these issues; Don is an expert 
and gives great advice.


What you last wrote shows that you NEED to do a TX Gain 
Calibration.  Your external power meter shows full output, so the K3s 
meter ckts need to be re-calibrated to agree with the ext. meter 
reading (assuming you trust the external meter).


Be sure that you use a 50-ohm non-reactive load (translation: a good 
dummy load).  If you measure into an antenna with any SWR > 1.05 the 
output power will not read accurately.  Power meters (SWR meters) are 
actually RF voltmeters and require a "perfect" 50-ohms to read correctly.


GL sounds like you are close to "fixing" your issues.

73, Ed - KL7UW

Date: Mon, 27 Mar 2017 14:17:24 -0700 (MST)
From: Serge_VA3SB 
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3S Power Issue

  Thank you very much for your prompt response Don.
  I have conducted a couple of additional tests and with an external 
power meter, even though the K3S indicates a power output of 75-80W, 
my external meter shows a power output of 100W.
  I will tighten all of the connections and my try some other cables 
as I only have the equipment connected on my desktop in the interim.

  Thanks again for your assistance.
  73
  Serge
  VA3SB


73, Ed - KL7UW
  http://www.kl7uw.com
Dubus-NA Business mail:
  dubus...@gmail.com 


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Re: [Elecraft] K3/K3s; Digital modes, specifically DV

[Bob Nielsen]

While the mcHF has some digital audio circuitry, I don't believe it 
provides a digital voice mode.


FreeDV is a very narrow-band (1.1 kHz) digital voice mode using the 
open-source Codec2, developed by VK5DGR.  One can run FreeDV without a 
computer using the Rowetel SM1000 adapter 
(https://www.tindie.com/products/edwin/sm1000-freedv-adpapter/). This 
should work nicely with a KX2 or KX3 for portable FreeDV operation.  I 
haven't tried doing that but it looks fairly straightforward.


Bob, N7XY


On 3/27/17 2:28 PM, Harry Yingst via Elecraft wrote:

  I would like to see Elecraft built it into their firmware.
I have a mcHF QRP radio that has Digital Voice in it

   From: Richard Fjeld 
  To: Elecraft Reflector 
  Sent: Monday, March 27, 2017 2:13 PM
  Subject: [Elecraft] K3/K3s; Digital modes, specifically DV

Greetings to all,


The K3/K3s is an excellent radio for digital modes due to the ease of
interfacing with a computer if desired.  A computer is not even needed
for some digital modes, and I have tried that successfully.

I have mentioned in the past that I had tried the free software for
digital voice on HF called 'FreeDV'.  I had worked a Canadian ham a few
times using it and he has been keeping in contact with me via email
encouraging me to get back into it.  I am starting to get up to date
again, and I found accurate reviews of it on
http://www.eham.net/reviews/detail/11016   by K2RWF and WA0TPN.  I think
you will find the reviews interesting and informative.

Notice that the reviews seem to be either at, or near, 5/5 or 0/5. I
think both of the reviews I mentioned answer why that is.  I will keep
my experience mute and let you glean aye/nay from the reviews. Whether
you approve of digital voice or not, the K3/K3s is a natural for using
it, and it's fun.  (As always with digital modes, be kind to your finals.)

FYI,
Dick, n0ce




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Re: [Elecraft] KX2 ATU question

[w7aqk]

Dave and All,

A while back, some enterprising person had posted a rather nice summary of 
all the Elecraft ATU's showing numbers of tuning combinations, etc.  I can't 
find it now, but maybe someone can post it again.  It may have been here on 
this reflector, or otherwise, on the KX3 reflector.


As I recall, the KX2 ATU had slightly fewer combinations, but only because 
160 and 6 meters were not included on the rig.  Thus it was deemed to 
perform nearly identically to the K3 and KX3 ATU's, and seems to do that 
based on my usage.


The T1 also had fewer combinations than the K3, but I think shows very 
similar to the KX2.  My guess is that you would find the KX2 ATU to do a 
competent job in comparison to the T1.  It is a very worthy addition to the 
rig.


Dave W7AQK




From: Dave Fugleberg 

How does the optional internal ATU for the KX2 compare to the Elecraft T1
ATU in terms of tuning range? In other words, if a given length of wire
works well with the T1, can one expect it to work with the KX2 internal
tuner?

I have a T1, but not a KX2 (at least not yet).
Is  it  a similar design?

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Re: [Elecraft] Key Line protection for MFJ-1026 Noise Cancelling Unit

[Don Wilhelm]

Peder,

That output is KEYLINE OUT and can be used for *any* device - amplifiers 
are most common.
If you have more than 2 devices connected to that KEYLINE output, there 
may be a voltage conflict between your external devices - the open 
circuit voltages for the different devices may be different and cause 
current to flow from one device to another.
Note that this is not a KX3 problem, it is a problem between the 
multiple devices external to the KX3.


Nothing should change in the KX3 functionality due to the KEYLINE OUT.

73,
Don W3FPR

On 3/27/2017 5:50 PM, pentrose wrote:

OK!  Super.  I will proceed on that.

Thanks for your patience.  I know that language must be exact in this world.
Yet, I don't want to put you into needless work.

Final Question: Is there any downside for me to use the E980232 adapter in
my situation?  It looks to me like the ACC2 port is mainly used for Linear
Amplifiers and other things like it in signaling.  And I like the KXPA 100
amplifier as it is already running.  I love that it automatice turns on with
the KX3 and makes other adjustments as well.  The KX3 is working great.


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Re: [Elecraft] KX2 ATU question

[Bill Johnson]

Linas, great review and answer.  I also owned both.  I found the T-1 to be 
fine; but for portable, just one more piece of equipment and more wires.  I 
have the KX2 and have used in the station so far and its tuner is super for the 
station needs.  Once it warms up will hit the trails.  The T-1 is excellent, 
better than the competition in my experience.  The K3 tuner has larger 
components and thus will tune much more logically.  Enjoy the Kx2 when you get 
it.  It is super.  I can grab and antenna, plug in the dragging counterpoise, 
and go walking with nothing else... you really cannot beat that with a stick!!!

73,
Bill
K9YEQ

-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Irma & 
Linas(LY2H)
Sent: Monday, March 27, 2017 5:00 PM
To: Dave Fugleberg ; Elecraft List 

Subject: Re: [Elecraft] KX2 ATU question

Dave,
Pretty much the same  to my experience. I have the T-1 for some 10 years and 
the KX-2 with the ATU installed for some 1 month, :). May be too early to make 
judgements but both tuners were  equally good in tuning the random wire of some 
9 m, also a 12m length vertical dipole fed by the 400 ohm open air line through 
the current balun. Both managed to tune it from 40 to 10 meters except of 80. 
The tuner of my K3 made it also into 80m ( almost no practical use but still 
the K3 tuner proved to be very capable, :). Except the extreme situations like 
this or the 1/2 wavelenght antennas the both small tuners doing extremely well. 
I would higly recommend the ATU option for the Kx2 since  this is a very 
protable rig and the ATU is a must in situations like hotel rooms etc. At the 
moment I am using it every day with greate success in my mobile setup tuning 
the base-load mobile whip ( 1.25 m
lenght) made of a junk-box loading coil and the whip stolen from the VHF
5/8 antenna. During  every 20min trip to work and back I make 1-3 QSO's incl 
even some stns from USA, Canada, Asian Russia and EU islands like Crete. I am 
very much content with this in-built tuner!

73! Linas LY2H

On 2017 kov. 27, pr at 22:06 Dave Fugleberg  wrote:

> How does the optional internal ATU for the KX2 compare to the Elecraft 
> T1 ATU in terms of tuning range? In other words, if a given length of 
> wire works well with the T1, can one expect it to work with the KX2 
> internal tuner?
>
>  I have a T1, but not a KX2 (at least not yet).
> Is  it  a similar design?
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Re: [Elecraft] KX2 ATU question

[Irma & Linas(LY2H)]

Dave,
Pretty much the same  to my experience. I have the T-1 for some 10 years
and the KX-2 with the ATU installed for some 1 month, :). May be too early
to make judgements but both tuners were  equally good in tuning the random
wire of some 9 m, also a 12m length vertical dipole fed by the 400 ohm open
air line through the current balun. Both managed to tune it from 40 to 10
meters except of 80. The tuner of my K3 made it also into 80m ( almost no
practical use but still the K3 tuner proved to be very capable, :). Except
the extreme situations like this or the 1/2 wavelenght antennas the both
small tuners doing extremely well. I would higly recommend the ATU option
for the Kx2 since  this is a very protable rig and the ATU is a must in
situations like hotel rooms etc. At the moment I am using it every day with
greate success in my mobile setup tuning the base-load mobile whip ( 1.25 m
lenght) made of a junk-box loading coil and the whip stolen from the VHF
5/8 antenna. During  every 20min trip to work and back I make 1-3 QSO's
incl even some stns from USA, Canada, Asian Russia and EU islands like
Crete. I am very much content with this in-built tuner!

73! Linas LY2H

On 2017 kov. 27, pr at 22:06 Dave Fugleberg  wrote:

> How does the optional internal ATU for the KX2 compare to the Elecraft T1
> ATU in terms of tuning range? In other words, if a given length of wire
> works well with the T1, can one expect it to work with the KX2 internal
> tuner?
>
>  I have a T1, but not a KX2 (at least not yet).
> Is  it  a similar design?
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Re: [Elecraft] Key Line protection for MFJ-1026 Noise Cancelling Unit

[pentrose]

OK!  Super.  I will proceed on that.

Thanks for your patience.  I know that language must be exact in this world. 
Yet, I don't want to put you into needless work.

Final Question: Is there any downside for me to use the E980232 adapter in
my situation?  It looks to me like the ACC2 port is mainly used for Linear
Amplifiers and other things like it in signaling.  And I like the KXPA 100
amplifier as it is already running.  I love that it automatice turns on with
the KX3 and makes other adjustments as well.  The KX3 is working great. 

Am I right that for me, nothing is changed in functionality?


Peder W7RPK





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Re: [Elecraft] Key Line protection for MFJ-1026 Noise Cancelling Unit

[Don Wilhelm]

I guess I should have said something more like "that is the maximum 
permissible voltage that can be safely applied from an external device".

It is the recommended operating voltage for the driving FET in the KX3.

73,
Don W3FPR

On 3/27/2017 5:26 PM, pentrose wrote:

Don, that would be such great news.
I am re-reading the chart on page 150 and it does not use the word Tolerate.

Peder W7RPK

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Re: [Elecraft] K3/K3s; Digital modes, specifically DV

[Harry Yingst via Elecraft]

 I would like to see Elecraft built it into their firmware.
I have a mcHF QRP radio that has Digital Voice in it

  From: Richard Fjeld 
 To: Elecraft Reflector  
 Sent: Monday, March 27, 2017 2:13 PM
 Subject: [Elecraft] K3/K3s; Digital modes, specifically DV
   
Greetings to all,

The K3/K3s is an excellent radio for digital modes due to the ease of 
interfacing with a computer if desired.  A computer is not even needed 
for some digital modes, and I have tried that successfully.

I have mentioned in the past that I had tried the free software for 
digital voice on HF called 'FreeDV'.  I had worked a Canadian ham a few 
times using it and he has been keeping in contact with me via email 
encouraging me to get back into it.  I am starting to get up to date 
again, and I found accurate reviews of it on 
http://www.eham.net/reviews/detail/11016   by K2RWF and WA0TPN.  I think 
you will find the reviews interesting and informative.

Notice that the reviews seem to be either at, or near, 5/5 or 0/5. I 
think both of the reviews I mentioned answer why that is.  I will keep 
my experience mute and let you glean aye/nay from the reviews. Whether 
you approve of digital voice or not, the K3/K3s is a natural for using 
it, and it's fun.  (As always with digital modes, be kind to your finals.)

FYI,
Dick, n0ce


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Re: [Elecraft] For Sale: Elecraft K2

[Harry Yingst via Elecraft]

That's actually a pretty good deal.
I've just built a K2 and the base radio alone cost more than what you are 
selling yours for

  From: David Inger 
 To: Elecraft@mailman.qth.net 
 Sent: Monday, March 27, 2017 11:06 AM
 Subject: Re: [Elecraft] For Sale: Elecraft K2
   
The individual who want to purchase the radio had overnight buyer's remorse"
and backed.  So here  we go again:
 
After much hand-wringing, I've decided to sell my 100-W K2.  The radio is in
excellent condition, both operationally and cosmetically.  I sent it back to
Don Wilhelm last summer for a "tune-up" and alignment.  Don's report stated
that the radio met or exceeded factory specs (documentation provided to new
owner).
 
The serial number is 31XX, so it is a Rev "B" version which meets current
production.  I am the second owner and I installed most options, including
the 100-watt module.  The radio includes:
KNB2 - Noise Blanker board
KSB2 - SSB board
KIOS2 - Serial Interface (with radio-to-computer cable)
KAF2 - Audio Filter and Realtime Clock
Kenwood MC-43S hand mic
All construction and operators manuals.
 
I love this radio, but I have to let go of some things.  After all these
years, the performance of the K2 is still top shelf; if I can hear it / work
it on my K3, I can do it on my K2.
 
My firm price for the all of the above is $650 including Priority Mail
shipping to any US ZIP code.  If you are anywhere near Santa Barbara, CA, I
would be happy to demo the radio.
 
I do have pictures and, yes, I take PayPal.
 
73 de K6SBA
David Inger
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Re: [Elecraft] Key Line protection for MFJ-1026 Noise Cancelling Unit

[pentrose]

Don, that would be such great news.  
I am re-reading the chart on page 150 and it does not use the word Tolerate.

Peder W7RPK



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Re: [Elecraft] K3S Power Issue

[Serge_VA3SB]

!DOCTYPE html PUBLIC -//W3C//DTD XHTML 1.0 Strict//EN 
http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd;

 
 
 
  Thank you very much for your prompt response Don. 
  I have conducted a couple of additional tests and with an external power 
meter, even though the K3S indicates a power output of 75-80W, my external 
meter shows a power output of 100W. 
  I will tighten all of the connections and my try some other cables as I only 
have the equipment connected on my desktop in the interim. 
  Thanks again for your assistance. 
  73 
  Serge 
  VA3SB 
  
   -- Original Message --
   From: Don Wilhelm [via Elecraft] 
ml-node+s365791n7628553...@n2.nabble.com
   Date: March 27, 2017 at 4:57 PM
   
Serge, 
   
   The first thing to do with a power output anomaly is to connect a dummy 
   load good for at least 100 watts and 50 ohms non-reactive to the K3 and 
   run the TX Gain Calibration from K3 Utility. 
   
   The next thing to do is to check all connectors to make sure they are 
   tight. With PL-259s, finger-tight may not be tight enough to 
insure 
   good contact for the shield connection - use pliers and give them that 
   LITTLE bit of extra tightness - dont overdo it. 
   
   I certainly cannot guess at what might have changed, but TX Gain 
   Calibration is a good place to start. 
   
   After that, since your antennas have a low SWR, you might try it with 
   the KAT500 in bypass. 
   
   On 3/27/2017 4:27 PM, Serge_VA3SB wrote:
   
 Hello to the group. I am a new user of the K3S/KAT500 combo. 
 Had fun using the rig during the contest over the weekend. I had it 
set for 
 100 watts and it worked very well. 
 However, today I thought that i would place the KAT500 underneath the 
K3S. 
 So after moving the KAT under the K3S I reconnected the cables and 
power to 
 both units. 
 
 No changes were made to any of the antennas and my swr on all 
antennas 
 80-10M is approx 1.1/1.2 - 1. 
 I cannot seem to be able to get the output power to 100 W.
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To unsubscribe from K3S Power Issue, 
click here .
 
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Re: [Elecraft] Key Line protection for MFJ-1026 Noise Cancelling Unit

[Don Wilhelm]

Peder,

Please re-read that part in the Cady manual again.
What it *should* say is that the KX3 Keyline output will *tolerate* up 
to +30 volts open circuit.
To convince yourself if necessary,  connect nothing to the KEYLINE 
output jack except your DMM.  It should read zero voltage.  Then set the 
DMM to read resistance - the resistance should be high, even infinite. 
When the KX3 goes into transmit, the resistance should be quite low, 
even zero.


The Keyline output is an open drain FET and produces no voltage by 
itself - the voltage is produced by the device connected to it.


Measure the open circuit voltage of the KEYLINE *input* on the MFJ unit. 
 In other words, do not connect anything to the T/R phone jack and 
measure the voltage with your DMM.  If it is less than 30 volts, it can 
be used with the KX3.


73,
Don W3FPR

On 3/27/2017 4:52 PM, pentrose wrote:

I am trying to use an MFJ-1026 "Noise Canceling Signal Enhancer" with my KX3
serial #08668.
The MFJ unit has a T/R phone jack for protecting its circuits from RF
currents when transmitting.

Q: The voltage seems to be too high according to the Cady book.  I need to
use the Key Line to signal the MFJ unit to bypass sensitive circuits during
transmission.

Pg 150 of the Elecraft KX-Line Fred Cady book says the ring has +30 volts on
the circuit when open.  The MFJ-1026 Manual says to never put over 15v
positive to the T/R phone jack?

From the MFJ-1026 Manual
“T/R Control: We Strongly recommend using this phono connector to switch the
MFJ-1026 to the transmit (or bypass) mode.  The MFJ-1026 switches
out-of-circuit whenever this line is pulled low (below one volt).
Never apply negative voltages, or over 15 volts positive, to this jack.”

I have the E980232 Cable adaptor with Key Line information on the Ring.  I
think I could use the phone jack to send the low signal through the Ring.
But when it opens up the voltage is too high?


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Re: [Elecraft] K3 error message

[Tom]

Hi,

WSJT-X does a few things wrong when it comes to dealing with CAT 
communications.  I pointed it out to them but it seems they are not 
interested in fixing the issues.

Win4K3 gets around the problems but not always.
There might not be much you can do about this.
73 Tom
va2fsq.com

-Original Message- 
From: VE3WDM

Sent: Monday, March 27, 2017 3:46 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3 error message

Hi Don thanks for the info, seems it is within the program but when I run it
inside Win4 K3 suite all goes well. I will have to compare setting with the
stand alone program to that of the one running in Win4 K3 suite.
Mike
VE3WDM



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Re: [Elecraft] K3S Power Issue

[Don Wilhelm]

Serge,

The first thing to do with a power output anomaly is to connect a dummy 
load good for at least 100 watts and 50 ohms non-reactive to the K3 and 
run the TX Gain Calibration from K3 Utility.


The next thing to do is to check all connectors to make sure they are 
tight.  With PL-259s, 'finger-tight' may not be tight enough to insure 
good contact for the shield connection - use pliers and give them that 
LITTLE bit of extra tightness - don't overdo it.


I certainly cannot guess at what might have changed, but TX Gain 
Calibration is a good place to start.


After that, since your antennas have a low SWR, you might try it with 
the KAT500 in bypass.


On 3/27/2017 4:27 PM, Serge_VA3SB wrote:

Hello to the group. I am a new user of the K3S/KAT500 combo.
Had fun using the rig during the contest over the weekend. I had it set for
100 watts and it worked very well.
However, today I thought that i would place the KAT500 underneath the K3S.
So after moving the KAT under the K3S I reconnected the cables and power to
both units.

No changes were made to any of the antennas and my swr on all antennas
80-10M is approx 1.1/1.2 - 1.
I cannot seem to be able to get the output power to 100 W.

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[Elecraft] Key Line protection for MFJ-1026 Noise Cancelling Unit

[pentrose]

I am trying to use an MFJ-1026 "Noise Canceling Signal Enhancer" with my KX3
serial #08668.
The MFJ unit has a T/R phone jack for protecting its circuits from RF
currents when transmitting.

Q: The voltage seems to be too high according to the Cady book.  I need to
use the Key Line to signal the MFJ unit to bypass sensitive circuits during
transmission.

Pg 150 of the Elecraft KX-Line Fred Cady book says the ring has +30 volts on
the circuit when open.  The MFJ-1026 Manual says to never put over 15v
positive to the T/R phone jack?

From the MFJ-1026 Manual
“T/R Control: We Strongly recommend using this phono connector to switch the
MFJ-1026 to the transmit (or bypass) mode.  The MFJ-1026 switches
out-of-circuit whenever this line is pulled low (below one volt).  
Never apply negative voltages, or over 15 volts positive, to this jack.”

I have the E980232 Cable adaptor with Key Line information on the Ring.  I
think I could use the phone jack to send the low signal through the Ring. 
But when it opens up the voltage is too high?

Also, am I on the right track here?  Other ways to do this?  I am not
qualified to create my own circuits.
can I just run a phone jack from the adaptor plugged into the ACC2 port? 
Provided I can deal with the +30 volts?  I have the KXPA 100 Amplifier and
no other amplifiers.  This is all I want or need. So the antenna 1 line
would run from the KX3 into the MFJ-1026 and then to the 100 watt amplifier. 
Is this right?

Peder Kittelson W7RPK





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[Elecraft] K3S Power Issue

[Serge_VA3SB]

Hello to the group. I am a new user of the K3S/KAT500 combo.
Had fun using the rig during the contest over the weekend. I had it set for
100 watts and it worked very well. 
However, today I thought that i would place the KAT500 underneath the K3S.
So after moving the KAT under the K3S I reconnected the cables and power to
both units. 

No changes were made to any of the antennas and my swr on all antennas
80-10M is approx 1.1/1.2 - 1.
I cannot seem to be able to get the output power to 100 W. I adjusted the
power control for 100 W but when I transmit I can only get between 75-80
Watts output maximum. 

Did I happen to hit a button accidentally when moving the equipment?
 
Any assistance would be greatly appreciated. Thanks in advance.

Regards

Serge
VA3SB 



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Re: [Elecraft] K3 error message

[VE3WDM]

Hi Don thanks for the info, seems it is within the program but when I run it
inside Win4 K3 suite all goes well. I will have to compare setting with the
stand alone program to that of the one running in Win4 K3 suite. 
Mike 
VE3WDM



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[Elecraft] KX2 ATU question

[Dave Fugleberg]

How does the optional internal ATU for the KX2 compare to the Elecraft T1
ATU in terms of tuning range? In other words, if a given length of wire
works well with the T1, can one expect it to work with the KX2 internal
tuner?

 I have a T1, but not a KX2 (at least not yet).
Is  it  a similar design?
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[Elecraft] KX2 test results in QST

[Szabó István]

Just found it in May Product review.

István, ha4zd


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[Elecraft] K3/K3s; Digital modes, specifically DV

[Richard Fjeld]

Greetings to all,

The K3/K3s is an excellent radio for digital modes due to the ease of 
interfacing with a computer if desired.  A computer is not even needed 
for some digital modes, and I have tried that successfully.

I have mentioned in the past that I had tried the free software for 
digital voice on HF called 'FreeDV'.  I had worked a Canadian ham a few 
times using it and he has been keeping in contact with me via email 
encouraging me to get back into it.  I am starting to get up to date 
again, and I found accurate reviews of it on 
http://www.eham.net/reviews/detail/11016   by K2RWF and WA0TPN.  I think 
you will find the reviews interesting and informative.

Notice that the reviews seem to be either at, or near, 5/5 or 0/5. I 
think both of the reviews I mentioned answer why that is.  I will keep 
my experience mute and let you glean aye/nay from the reviews. Whether 
you approve of digital voice or not, the K3/K3s is a natural for using 
it, and it's fun.  (As always with digital modes, be kind to your finals.)

FYI,
Dick, n0ce


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[Elecraft] KX3 - protection

[Ingo Meyer, DK3RED]

Dear Elecrafter,


Is there in the front end (at the antenna) of the KX3
an overvoltage protection like in the K3?


73/72 de Ingo, DK3RED - Don't forget: the fun is the power!
www.qrp4fun.de - dk3...@qrp4fun.de
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Re: [Elecraft] For Sale: Elecraft K2

[David Inger]

The individual who want to purchase the radio had overnight buyer's remorse"
and backed.  So here  we go again:
 
After much hand-wringing, I've decided to sell my 100-W K2.  The radio is in
excellent condition, both operationally and cosmetically.  I sent it back to
Don Wilhelm last summer for a "tune-up" and alignment.  Don's report stated
that the radio met or exceeded factory specs (documentation provided to new
owner).
 
The serial number is 31XX, so it is a Rev "B" version which meets current
production.  I am the second owner and I installed most options, including
the 100-watt module.  The radio includes:
KNB2 - Noise Blanker board
KSB2 - SSB board
KIOS2 - Serial Interface (with radio-to-computer cable)
KAF2 - Audio Filter and Realtime Clock
Kenwood MC-43S hand mic
All construction and operators manuals.
 
I love this radio, but I have to let go of some things.  After all these
years, the performance of the K2 is still top shelf; if I can hear it / work
it on my K3, I can do it on my K2.
 
My firm price for the all of the above is $650 including Priority Mail
shipping to any US ZIP code.  If you are anywhere near Santa Barbara, CA, I
would be happy to demo the radio.
 
I do have pictures and, yes, I take PayPal.
 
73 de K6SBA
David Inger
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Re: [Elecraft] RF in Microphone

[j...@kk9a.com]

Interesting, how bad is the audio when this occurred? I thought that the
K3S had a protection circuit to protect the finals from damage. The finals
certainly see high SWR when setting up the KAT500. I am not sure what any
of this has to do with the KPA500 as it has it's own finals and it will
quickly shut down due to high SWR.

John KK9A


From: Kenneth Christiansen W0CZ
Sun Mar 26 20:22:57 EDT 2017

Hi Jim

The answer to your problem is you have a bad FET in the final of your K3S.
I had the same problem and my K3S is at Elecraft right now being repaired.
The distortion above the 12 watt level is the clue.

I also have the KPA500 and the KAT500 and I had a problem with my antenna
that it would sometimes short out at 500 watts and the KPA500 was not set
up for the KPA500. I had figured since I bought both units together they
would just work. I had even read the missing instructions but they did not
make sense to me so I did not do them. Now that I found out what was
involved they make sense but I think that part of the instructions should
be more clear or a control in the MENU should allow the settings to be
compatible with the KAP500.

To make this long story short if the KAT500 is not set up to be comparable
with the KPA500 than if there is a high SWR it does not shut down the
KPA500 and when the KPA500 does shut down all those high SWR voltages get
back to the K3S and blow one of the FETs. There are two FETs so the other
one tries to make up the power and of course the bad one causes distortion
similar to a diode being placed across the final.

I hope this information helps and for what it is worth I managed to
destroy my finals twice before I found out what was wrong.

Good luck and 73

Ken
W0CZ

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Re: [Elecraft] RF in Microphone

[Lou Voerman W2ROW]

Jim,

You definitely need to contact Elecraft support. I had exactly the same
problem with a K3S I built recently and the KPA3A was bad. Elecraft replaced
it and all is well now. 

Lou  W2ROW



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