RX I/Q output planned or thought about for the K3/P3?

[AB3LS]

I've done a little searching around on here and didn't find much relating
to the direct conversation of an RX I/Q port or the likes being offered for
the K3.

With the KX3 now in the light, I find the RX I/Q port something that would
double my experience with the K3.

I already have the KXV3 I/O Module and the P3. However, I'm not really
interested in buying another piece of hardware to work with the P3's IF Out.

Since the K3 is an SDR and the P3 is an SDR, I imagine there has to be a
way to get I/Q data to a computer from either of them, either through a
software update or an extra module. Am I right?

Is anything like this planned?

73
DE AB3LS
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[Tony Estep]

On Tue, May 8, 2012 at 10:14 PM, Geoff Wolf AB3LS
<[hidden email]>wrote:

> ....way to get I/Q data to a computer from ...an extra module....?
> =============

Well Geoff, one way is to use a Softrock-IF (a kit, available from KB9YIG
for less than 30 bucks); another way is to use an LP-Pan (available from
http://www.telepostinc.com/LP-PAN.html).  The LP-Pan costs way more but has
better dynamic range and other fancy features; nonetheless the little
Softrock is a dynamite piece of engineering and does a great job.

In either case you will get much better results by adding an outboard sound
card instead of your computer's on-board card. I use an EMU0202, no longer
made, but others are good too. You take IF out of the back of the K3 and
feed the Softrock or LP-Pan, and get I-Q out.

Tony KT0NY




--
http://www.isb.edu/faculty/facultydir.aspx?ddlFaculty=352
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[AB3LS]

Tony,

Yes I am aware of Softrock and LP-Pan, as well as a whole slew of other
SDRs you could use with the K3's Buffered IF Output.

I suppose the thing I'm trying to get at is a direct I/Q line from the
K3... Whether a software update is possible to add this to the current
Stereo Line-Out jack (on the back of the K3) or not.

73
DE AB3LS

On Tue, May 8, 2012 at 11:31 PM, Tony Estep <[hidden email]> wrote:

> On Tue, May 8, 2012 at 10:14 PM, Geoff Wolf AB3LS
> <[hidden email]>wrote:
>
> > ....way to get I/Q data to a computer from ...an extra module....?
> > =============
>
> Well Geoff, one way is to use a Softrock-IF (a kit, available from KB9YIG
> for less than 30 bucks); another way is to use an LP-Pan (available from
> http://www.telepostinc.com/LP-PAN.html).  The LP-Pan costs way more but
> has
> better dynamic range and other fancy features; nonetheless the little
> Softrock is a dynamite piece of engineering and does a great job.
>
> In either case you will get much better results by adding an outboard sound
> card instead of your computer's on-board card. I use an EMU0202, no longer
> made, but others are good too. You take IF out of the back of the K3 and
> feed the Softrock or LP-Pan, and get I-Q out.
>
> Tony KT0NY
>
>
>
>
> --
> http://www.isb.edu/faculty/facultydir.aspx?ddlFaculty=352
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
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> Please help support this email list: http://www.qsl.net/donate.html
>

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[David Gilbert]

The short answer to all of that is "nope".

73,
Dave   AB7E



On 5/8/2012 9:03 PM, Geoff Wolf AB3LS wrote:

> Tony,
>
>
>
> I suppose the thing I'm trying to get at is a direct I/Q line from the
> K3... Whether a software update is possible to add this to the current
> Stereo Line-Out jack (on the back of the K3) or not.
>
> 73
> DE AB3LS

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[Joe Subich, W4TV-4]

Geoff,

 > I suppose the thing I'm trying to get at is a direct I/Q line from the
 > K3... Whether a software update is possible to add this to the current
 > Stereo Line-Out jack (on the back of the K3) or not.

At present, there simply *is no hardware* capable of providing a direct
I/Q output to the stereo line out jack.  Line Out audio is "0 Hz based"
following the main/sub RX.  I doubt the K3 has enough processing power
to do a separate 15 KHz to 6 KHz I/Q conversion and even if it did the
output bandwidth would be severely limited by the 1st IF ("roofing")
filters.

The P3 certainly has no provision for separate I/Q audio output.  Other
than the display. the entire P3 electronics would need to be duplicated
to generate an I/Q output otherwise the audio (if it could be extracted
from the P3 and there is no DAC to do so)would be limited to the span
and resolution of the P3 display.

As Tony has suggested, the proper way to get wideband I/Q audio from
the K3 is by use of a SoftRock with Clifton Labs isolation amplifier
or an LP-Pan connected to the K3's wideband IF output. Other solutions
would essentially be reinventing the Softrock or LP-Pan and any USB
based solution would likely be limited to a 48 KHz sample rate if it
used one of the commercial USB sound chips.

73,

    ... Joe, W4TV


On 5/9/2012 12:03 AM, Geoff Wolf AB3LS wrote:

> Tony,
>
> Yes I am aware of Softrock and LP-Pan, as well as a whole slew of other
> SDRs you could use with the K3's Buffered IF Output.
>
> I suppose the thing I'm trying to get at is a direct I/Q line from the
> K3... Whether a software update is possible to add this to the current
> Stereo Line-Out jack (on the back of the K3) or not.
>
> 73
> DE AB3LS
>
> On Tue, May 8, 2012 at 11:31 PM, Tony Estep<[hidden email]>  wrote:
>
>> On Tue, May 8, 2012 at 10:14 PM, Geoff Wolf AB3LS
>> <[hidden email]>wrote:
>>
>>> ....way to get I/Q data to a computer from ...an extra module....?
>>> =============
>>
>> Well Geoff, one way is to use a Softrock-IF (a kit, available from KB9YIG
>> for less than 30 bucks); another way is to use an LP-Pan (available from
>> http://www.telepostinc.com/LP-PAN.html).  The LP-Pan costs way more but
>> has
>> better dynamic range and other fancy features; nonetheless the little
>> Softrock is a dynamite piece of engineering and does a great job.
>>
>> In either case you will get much better results by adding an outboard sound
>> card instead of your computer's on-board card. I use an EMU0202, no longer
>> made, but others are good too. You take IF out of the back of the K3 and
>> feed the Softrock or LP-Pan, and get I-Q out.
>>
>> Tony KT0NY
>>
>>
>>
>>
>> --
>> http://www.isb.edu/faculty/facultydir.aspx?ddlFaculty=352
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:[hidden email]
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>>
> ______________________________________________________________
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> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
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[AB3LS]

Thanks for the input guys.

I wanted to see if this was possible. Oh well.

I'll go look at the Softrock again.

73
DE AB3LS

On Wed, May 9, 2012 at 2:03 AM, Joe Subich, W4TV <[hidden email]> wrote:

>
> Geoff,
>
>
> > I suppose the thing I'm trying to get at is a direct I/Q line from the
> > K3... Whether a software update is possible to add this to the current
> > Stereo Line-Out jack (on the back of the K3) or not.
>
> At present, there simply *is no hardware* capable of providing a direct
> I/Q output to the stereo line out jack.  Line Out audio is "0 Hz based"
> following the main/sub RX.  I doubt the K3 has enough processing power
> to do a separate 15 KHz to 6 KHz I/Q conversion and even if it did the
> output bandwidth would be severely limited by the 1st IF ("roofing")
> filters.
>
> The P3 certainly has no provision for separate I/Q audio output.  Other
> than the display. the entire P3 electronics would need to be duplicated
> to generate an I/Q output otherwise the audio (if it could be extracted
> from the P3 and there is no DAC to do so)would be limited to the span
> and resolution of the P3 display.
>
> As Tony has suggested, the proper way to get wideband I/Q audio from
> the K3 is by use of a SoftRock with Clifton Labs isolation amplifier
> or an LP-Pan connected to the K3's wideband IF output. Other solutions
> would essentially be reinventing the Softrock or LP-Pan and any USB
> based solution would likely be limited to a 48 KHz sample rate if it
> used one of the commercial USB sound chips.
>
> 73,
>
>   ... Joe, W4TV
>
>
>
> On 5/9/2012 12:03 AM, Geoff Wolf AB3LS wrote:
>
>> Tony,
>>
>> Yes I am aware of Softrock and LP-Pan, as well as a whole slew of other
>> SDRs you could use with the K3's Buffered IF Output.
>>
>> I suppose the thing I'm trying to get at is a direct I/Q line from the
>> K3... Whether a software update is possible to add this to the current
>> Stereo Line-Out jack (on the back of the K3) or not.
>>
>> 73
>> DE AB3LS
>>
>> On Tue, May 8, 2012 at 11:31 PM, Tony Estep<[hidden email]>  wrote:
>>
>>  On Tue, May 8, 2012 at 10:14 PM, Geoff Wolf AB3LS
>>> <[hidden email]>**wrote:
>>>
>>>  ....way to get I/Q data to a computer from ...an extra module....?
>>>> =============
>>>>
>>>
>>> Well Geoff, one way is to use a Softrock-IF (a kit, available from KB9YIG
>>> for less than 30 bucks); another way is to use an LP-Pan (available from
>>> http://www.telepostinc.com/LP-**PAN.html<http://www.telepostinc.com/LP-PAN.html>).
>>>  The LP-Pan costs way more but
>>> has
>>> better dynamic range and other fancy features; nonetheless the little
>>> Softrock is a dynamite piece of engineering and does a great job.
>>>
>>> In either case you will get much better results by adding an outboard
>>> sound
>>> card instead of your computer's on-board card. I use an EMU0202, no
>>> longer
>>> made, but others are good too. You take IF out of the back of the K3 and
>>> feed the Softrock or LP-Pan, and get I-Q out.
>>>
>>> Tony KT0NY
>>>
>>>
>>>
>>>
>>> --
>>> http://www.isb.edu/faculty/**facultydir.aspx?ddlFaculty=352<http://www.isb.edu/faculty/facultydir.aspx?ddlFaculty=352>
>>> ______________________________**______________________________**__
>>> Elecraft mailing list
>>> Home: http://mailman.qth.net/**mailman/listinfo/elecraft<http://mailman.qth.net/mailman/listinfo/elecraft>
>>> Help: http://mailman.qth.net/mmfaq.**htm<http://mailman.qth.net/mmfaq.htm>
>>> Post: mailto:[hidden email].**net <[hidden email]>
>>>
>>> This list hosted by: http://www.qsl.net
>>> Please help support this email list: http://www.qsl.net/donate.html
>>>
>>>  ______________________________**______________________________**__
>> Elecraft mailing list
>> Home: http://mailman.qth.net/**mailman/listinfo/elecraft<http://mailman.qth.net/mailman/listinfo/elecraft>
>> Help: http://mailman.qth.net/mmfaq.**htm<http://mailman.qth.net/mmfaq.htm>
>> Post: mailto:[hidden email].**net <[hidden email]>
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
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>>

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[Edward R Cole]

Geoff,

This topic was kicked around about two years ago and basically
Elecraft said it they had no plans to provide access to the IQ ckts
in the K3.  I'm not sure if there may be future plans to add this for
the P3?  Since there is no hardware path then no firmware upgrade can
switch it to a connector.  I would have loved direct digital access
to the IQ ckts instead of buying two LP-Pan, which duplicate the IQ
mixers in the K3 but provide base-band audio output for connection
thru a soundcard.

I modified my K3 sub-receiver to breakout the 1st IF so I could
connect a LP-Pan to it, as well.  From the two LP-Pan I connect a
four-port soundcard (M-audio Delta-44) for running dual-receive
diversity reception on Linrad SDR sw.  If I only want to use one
receiver, I bought the emu0202 soundcard, since it can do 192-KHz bandwidth.

I bought the LP-Pan used for about half-price and also the
emu0202.  I found the Delta-44 cheap on Amazon.com.
I document all this here:
http://www.kl7uw.com/LINRAD.htm

Its an unfinished project at this time.

73, Ed - KL7UW


-------------------------------
Date: Wed, 9 May 2012 00:03:01 -0400
From: Geoff Wolf AB3LS <[hidden email]>
Subject: Re: [Elecraft] RX I/Q output planned or thought about for the
         K3/P3?
To: [hidden email]
Message-ID:
         <[hidden email]>
Content-Type: text/plain; charset=ISO-8859-1

Tony,

Yes I am aware of Softrock and LP-Pan, as well as a whole slew of other
SDRs you could use with the K3's Buffered IF Output.

I suppose the thing I'm trying to get at is a direct I/Q line from the
K3... Whether a software update is possible to add this to the current
Stereo Line-Out jack (on the back of the K3) or not.

73
DE AB3LS




73, Ed - KL7UW, WD2XSH/45
======================================
BP40IQ   500 KHz - 10-GHz   www.kl7uw.com
EME: 50-1.1kw?, 144-1.4kw, 432-QRT, 1296-?, 3400-?
DUBUS Magazine USA Rep [hidden email]
"Kits made by KL7UW" http://www.kl7uw.com/kits.htm
======================================
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[Mike Schwendeman]

Geoff;

As far as I know, the K3 is NOT an SDR.  (Search the Elecraft web site
for better information; If it were an SDR, I am very sure that the folks
at Elecraft would be very sure to mention this.)  The KX3 is reported to
be an SDR, and is, per the block diagram.

I am also very interested in an "easy way" to get a version of PowerSDR
to operate with the KX3's I/Q outputs.  This is a very new field for a
lot of folks, and so there will be a learning curve.  But the results
are well worth the effort.  (Me, I'm fighting mirror images on some
apps, using a low-cost SDR RX..!)

73;    -Mike-    KØJTA


On 5/8/12 10:14 PM, Geoff Wolf AB3LS wrote:

> I've done a little searching.....
> ........ (snip) ........
> Since the K3 is an SDR and the P3 is an SDR, I imagine there has to be a
> way to get I/Q data to a computer from either of them, either through a
> software update or an extra module. Am I right?
>
> Is anything like this planned?
>
> 73
> DE AB3LS
>

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[Arthur Burke]

The folks at Elecraft *have* mentioned this - they have often made
reference to it as an SDR - not that it really matters to me one way or the
other.

Art - N4PJ



On Wed, May 9, 2012 at 9:01 AM, Mike Schwendeman <[hidden email]> wrote:

> Geoff;
>
> As far as I know, the K3 is NOT an SDR.  (Search the Elecraft web site
> for better information; If it were an SDR, I am very sure that the folks
> at Elecraft would be very sure to mention this.)  The KX3 is reported to
> be an SDR, and is, per the block diagram.
>
> I am also very interested in an "easy way" to get a version of PowerSDR
> to operate with the KX3's I/Q outputs.  This is a very new field for a
> lot of folks, and so there will be a learning curve.  But the results
> are well worth the effort.  (Me, I'm fighting mirror images on some
> apps, using a low-cost SDR RX..!)
>
> 73;    -Mike-    KØJTA
>
>
> On 5/8/12 10:14 PM, Geoff Wolf AB3LS wrote:
> > I've done a little searching.....
> > ........ (snip) ........
> > Since the K3 is an SDR and the P3 is an SDR, I imagine there has to be a
> > way to get I/Q data to a computer from either of them, either through a
> > software update or an extra module. Am I right?
> >
> > Is anything like this planned?
> >
> > 73
> > DE AB3LS
> >
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>

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[Don Wilhelm-4]

The hardware is not there to do what you wish.  It would take a hardware
mod and there is little space for that.

73,
Don W3FPR

On 5/9/2012 12:03 AM, Geoff Wolf AB3LS wrote:

> Tony,
>
> Yes I am aware of Softrock and LP-Pan, as well as a whole slew of other
> SDRs you could use with the K3's Buffered IF Output.
>
> I suppose the thing I'm trying to get at is a direct I/Q line from the
> K3... Whether a software update is possible to add this to the current
> Stereo Line-Out jack (on the back of the K3) or not.
>
> 73
> DE AB3LS
>
> On Tue, May 8, 2012 at 11:31 PM, Tony Estep<[hidden email]>  wrote:
>
>> On Tue, May 8, 2012 at 10:14 PM, Geoff Wolf AB3LS
>> <[hidden email]>wrote:
>>
>>> ....way to get I/Q data to a computer from ...an extra module....?
>>> =============
>> Well Geoff, one way is to use a Softrock-IF (a kit, available from KB9YIG
>> for less than 30 bucks); another way is to use an LP-Pan (available from
>> http://www.telepostinc.com/LP-PAN.html).  The LP-Pan costs way more but
>> has
>> better dynamic range and other fancy features; nonetheless the little
>> Softrock is a dynamite piece of engineering and does a great job.
>>
>> In either case you will get much better results by adding an outboard sound
>> card instead of your computer's on-board card. I use an EMU0202, no longer
>> made, but others are good too. You take IF out of the back of the K3 and
>> feed the Softrock or LP-Pan, and get I-Q out.
>>
>> Tony KT0NY
>>
>>
>>
>>
>> --
>> http://www.isb.edu/faculty/facultydir.aspx?ddlFaculty=352
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:[hidden email]
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>>
> ______________________________________________________________
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> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
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>
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[Don Wilhelm-4]

The K3 *is* an SDR as long as one defines an SDR to be a radio whose
functions are defined by software (firmware).
If your view of SDR is a radio that must connect to a computer
soundcard, then the K3 will not qualify because the "computer" is inside
the K3 in the form of dedicated processors.

Any radio that uses DSP for modulation, demodulation and filtering (plus
other things like NR and NB) is an SDR as far as I am concerned - as
long as the software to do those functions can be changed.

73,
Don W3FPR

On 5/9/2012 9:52 AM, Arthur Burke wrote:

> The folks at Elecraft *have* mentioned this - they have often made
> reference to it as an SDR - not that it really matters to me one way or the
> other.
>
> Art - N4PJ
>
>
>
> On Wed, May 9, 2012 at 9:01 AM, Mike Schwendeman<[hidden email]>  wrote:
>
>> Geoff;
>>
>> As far as I know, the K3 is NOT an SDR.  (Search the Elecraft web site
>> for better information; If it were an SDR, I am very sure that the folks
>> at Elecraft would be very sure to mention this.)  The KX3 is reported to
>> be an SDR, and is, per the block diagram.
>>
>> I am also very interested in an "easy way" to get a version of PowerSDR
>> to operate with the KX3's I/Q outputs.  This is a very new field for a
>> lot of folks, and so there will be a learning curve.  But the results
>> are well worth the effort.  (Me, I'm fighting mirror images on some
>> apps, using a low-cost SDR RX..!)
>>
>> 73;    -Mike-    KØJTA
>>

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[Matt Zilmer]

If you decide to use the KX3's I/Q output, be sure that the 2.5mm
plug's 'shoulder' doesn't interfere with the top cover.  There is a
cutout for the RX I/Q jack but it's not designed for Radio Shack
adapters (too wide).  Some molded cables also have this problem.

HDSDR works fine with the KX3, using the I/Q output.  You'll want to
add some isolation though.  The KX3 doesn't have its own isolation
transformers because of mechanical design constraints.  With the K3,
isolation is built-in.

FWIW, both radios are SDRs, their behavior being completely dictated
by loadable software.  Without software, both rigs are very robust
hardware platforms, but a bit lacking in functionality....

73,
matt W6NIA
KX3 #6
K3 #24

On Wed, 09 May 2012 08:01:05 -0500, you wrote:

>Geoff;
>
>As far as I know, the K3 is NOT an SDR.  (Search the Elecraft web site
>for better information; If it were an SDR, I am very sure that the folks
>at Elecraft would be very sure to mention this.)  The KX3 is reported to
>be an SDR, and is, per the block diagram.
>
>I am also very interested in an "easy way" to get a version of PowerSDR
>to operate with the KX3's I/Q outputs.  This is a very new field for a
>lot of folks, and so there will be a learning curve.  But the results
>are well worth the effort.  (Me, I'm fighting mirror images on some
>apps, using a low-cost SDR RX..!)
>
>73;    -Mike-    KØJTA
>
>
>On 5/8/12 10:14 PM, Geoff Wolf AB3LS wrote:
>> I've done a little searching.....
>> ........ (snip) ........
>> Since the K3 is an SDR and the P3 is an SDR, I imagine there has to be a
>> way to get I/Q data to a computer from either of them, either through a
>> software update or an extra module. Am I right?
>>
>> Is anything like this planned?
>>
>> 73
>> DE AB3LS
>>
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[Mike Schwendeman]

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[Mike Schwendeman]

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[Mike Schwendeman]

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[Mike Schwendeman]

FOURTH try… (!!)
This time, I have copied the text, and placed it into a text editor. I
converted (saved it as) a plain TEXT DOCUMENT. (Maybe some formatting
has entered..?)

I have also removed all TABS, which were in the previous attempts.

I am making this latest attempt on a different machine, different OS, etc.

Mike
KØJTA

The "THird try" below was sent my be at 10:17 AM, central time.
==============================

Third try... (Still am puzzled by my two previous attempts that showed
that I had posted, but there was no content.) Art, I am CC'ing this to
you, also; Can you identify my error, please? (Thank you.)
-Mike- KØJTA
=== (The following was sent by me at about 0936, my time) =========

Hmmm.... For some reason, the TEXT of this email (sent at my time of
09:23 AM) was not viewable on the Elecraft reflector. (!) I will trim a
bit off, and see if this helps.
-Mike- KØJTA


On 5/9/12 9:23 AM, Mike Schwendeman wrote:
Hi, Art;

I may be wrong on this, but I have (in the past) looked at each and
every page on the Elecraft web site, looking for "SDR" and "defined" and
the like. I was unable to locate these (or similar) terms. Had I missed
a page?

I am ASSUMING that the good folks at Elecraft would be extremely happy
to use the coveted "SDR" term in the description of the K3. Yet, I have
missed it, if it is there.

To me, the K3 is not an SDR for so many reasons, to be GENTLY honest.
The KX3 is an SDR, per the block diagram, however.

-Mike-

On 5/9/12 8:52 AM, Arthur Burke wrote:
The folks at Elecraft *have* mentioned this - they have often made
reference to it as an SDR - not that it really matters to me one way or
the other.

Art - N4PJ



On Wed, May 9, 2012 at 9:01 AM, Mike Schwendeman ‪<[hidden email]>‬ wrote:
Geoff;

As far as I know, the K3 is NOT an SDR........... (Snipped) ...........

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[Mike Schwendeman]

Wow...
That was easy, right?

It turns out that I had sent the email as usual, formatted as "auto
detect."  It turns out that some recipients are able to deal with the
"auto" term easier than others.  (I don't know what else to say.  I am
active on other groups...)

Well, so be it.  Lesson learned by me.  This email ( as was my past one)
is now solidly ASSIGNED to be PLAIN TEXT ONLY, per the settings in my
Thunderbird email application on my MacBook AIR.  (So, we shall see if
even THIS one will pass the test.)

Very sorry for my past failed attempts.  I am happy to learn of the
needs of this reflector.  I am still puzzled that the very FIRST reply
had gone through all right; -Perhaps there was a precedent set by my
action of the reply of the (already formatted) content of the reflector.

Tank you for your collective tolerance.

73;    -Mike-    KØJTA
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[Joe Subich, W4TV-4]

Mike,

The software used for the Elecraft reflector strips HTML.  Thus if your
e-mail program is configured to send HTML only, the message will be blank.

To answer your question:

> I may be wrong on this, but I have (in the past) looked at each and
> every page on the Elecraft web site, looking for "SDR" and "defined"
> and the like. I was unable to locate these (or similar) terms. Had I
> missed a page?

While Elecraft do not specifically state the K3 is an "SDR" on the
web site, Eric, Wayne and Lyle have all referred to it as such on
the reflector.

The definition of software defined radio as given at Wikipedia
(http://en.wikipedia.org/wiki/Software-defined_radio) is:

> A software-defined radio system, or SDR, is a radio communication
> system where components that have been typically implemented in
> hardware (e.g. mixers, filters, amplifiers, modulators/demodulators,
> detectors, etc.) are instead implemented by means of software on a
> personal computer or embedded computing devices.[1] While the concept
> of SDR is not new, the rapidly evolving capabilities of digital
> electronics render practical many processes which used to be only
> theoretically possible.

While there are SDRs that use a minimum of dedicated RF hardware with
most of the control and processing preformed by *software* running on
a general purpose processor (e.g, "IBM PC" or "Macintosh") platform,
an SDR may also be implemented by running code on a dedicated processor
in the device (e.g. Elecraft K3, or any other transceiver that can be
significantly modified by uploading new firmware).

There is currently no commercially manufactured amateur HF rig that
is 100% SDR.  Every one, from the Flex-5000 to KX3 uses a different
mix of dedicated hardware and processor based functions.  However,
nearly every transceiver currently offered contains some decree of
SDR elements.

73,

    ... Joe, W4TV


On 5/9/2012 11:30 AM, Mike Schwendeman wrote:

> FOURTH try… (!!) This time, I have copied the text, and placed it
> into a text editor. I converted (saved it as) a plain TEXT DOCUMENT.
> (Maybe some formatting has entered..?)
>
> I have also removed all TABS, which were in the previous attempts.
>
> I am making this latest attempt on a different machine, different OS,
> etc.
>
> Mike KØJTA
>
> The "THird try" below was sent my be at 10:17 AM, central time.
> ==============================
>
> Third try... (Still am puzzled by my two previous attempts that
> showed that I had posted, but there was no content.) Art, I am CC'ing
> this to you, also; Can you identify my error, please? (Thank you.)
> -Mike- KØJTA === (The following was sent by me at about 0936, my
> time) =========
>
> Hmmm.... For some reason, the TEXT of this email (sent at my time of
> 09:23 AM) was not viewable on the Elecraft reflector. (!) I will trim
> a bit off, and see if this helps. -Mike- KØJTA
>
>
> On 5/9/12 9:23 AM, Mike Schwendeman wrote: Hi, Art;
>
> I may be wrong on this, but I have (in the past) looked at each and
> every page on the Elecraft web site, looking for "SDR" and "defined"
> and the like. I was unable to locate these (or similar) terms. Had I
> missed a page?
>
> I am ASSUMING that the good folks at Elecraft would be extremely
> happy to use the coveted "SDR" term in the description of the K3.
> Yet, I have missed it, if it is there.
>
> To me, the K3 is not an SDR for so many reasons, to be GENTLY
> honest. The KX3 is an SDR, per the block diagram, however.
>
> -Mike-
>
> On 5/9/12 8:52 AM, Arthur Burke wrote: The folks at Elecraft *have*
> mentioned this - they have often made reference to it as an SDR - not
> that it really matters to me one way or the other.
>
> Art - N4PJ
>
>
>
> On Wed, May 9, 2012 at 9:01 AM, Mike Schwendeman ‪<[hidden email]>‬
> wrote: Geoff;
>
> As far as I know, the K3 is NOT an SDR........... (Snipped)
> ...........
>
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