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Re: P3, what lies ahead?

David Gilbert


Finally!  Someone actually gave me an answer.

Thank you.

73,
Dave   AB7E



On 2/24/2011 10:44 AM, Joe Subich, W4TV wrote:

>
>> They obviously didn't include it, though, and in spite of several
>> public and private queries from me regarding the reason for that
>> omission I never got a single answer.
>
> Examination of the P3 data would suggest that I/Q do not exist
> except in the digital domain.  I highly doubt that the hardware
> has sufficient I/O to support the add-in DAC necessary to provide
> analog I/Q for an external sound card.
>
>> (the other reason is that there is no capability to display the 2nd
>> receiver even if I hardware hack the K3 to bring out the 2nd IF)
>
> That's incorrect.  All you need to do is provide an IF signal from
> the KRX3 instead of the main receiver.  Th P3 will happily display
> that signal although the VFO A/VFO B controls will be reversed.  I
> don't think it would take a whole lot for Al to add an "A/B" function
> although I'm certain it is *way* down the priority list.
>
>> Anyone who wants to run CW Skimmer or any other third party SDR
>> software will have to buy another piece of hardware to do it, when
>> the P3 could have easily provided that capability.
>
> It is far from "easy" or cheap to provide that capability.  Given
> the structure of the P3 the necessary independent I/Q signals are
> not preset ... the only accessible I/Q are based on the selected
> display width and are locked to the display's center frequency.
> To provide the support you seek would take a second AD6620, a
> second control interface from the dsPIC, DAC and audio drivers
> - none of which are available in the P3.  The cost of the "add on"
> to drive a separate sound card for CW Skimmer would be substantially
> more than the LP-Pan hardware and provide no additional benefit.
>
> 73,
>
>    ... Joe, W4TV
>
>
> On 2/24/2011 12:06 PM, David Gilbert wrote:
>>
>> Don't hold your breath waiting for that.  I lobbied long and hard for
>> that capability (buffered IQ outputs) from the very beginning ...
>> starting back when Elecraft first announced they would be introducing
>> the P3.   They obviously didn't include it, though, and in spite of
>> several  public and private queries from me regarding the reason for
>> that omission I never got a single answer.  The lack of IQ outputs is
>> the single biggest reason why I will not buy a P3 (the other reason is
>> that there is no capability to display the 2nd receiver even if I
>> hardware hack the K3 to bring out the 2nd IF).   Anyone who wants to run
>> CW Skimmer or any other third party SDR software will have to buy
>> another piece of hardware to do it, when the P3 could have easily
>> provided that capability.
>>
>> 73,
>> Dave   AB7E
>>
>>
>>
>> On 2/23/2011 6:03 PM, Igor Kosvin wrote:
>>> I just assembled P3 two days ago. One of the things I would like to
>>> see is
>>> the IQ output of the P3. The signals are definitely generated in P3
>>> and I
>>> would guess it is just the matter of buffer and connector. With these
>>> signals and decent sound card one can play with PSDR software (open
>>> source
>>> BTW) or number of other similar programs and even run skimmer for
>>> the RBN.
>>> How cool is that?
>>> 73,
>>> Igor, N1YX
>>>
>>> -----Original Message-----
>>> From: [hidden email]
>>> [mailto:[hidden email]] On Behalf Of Bill
>>> Sent: Wednesday, February 23, 2011 5:13 PM
>>> To: [hidden email]
>>> Subject: [Elecraft] P3, what lies ahead?
>>>
>>>
>>> Has anyone figured out the possible purpose of those unused holes in
>>> the P3
>>> backpanel?
>>>
>>> One of them labeled "sensor"  ???
>>>
>>> 73, K3UJ
>>> ______________________________________________________________
>>> 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
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>>>
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>>>
>> ______________________________________________________________
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>
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Re: P3, what lies ahead?

N5GE
In reply to this post by Nr4c

N4RC is correct.  Having thought about how I did it again I recalled was using
the K3 S-Meter, not the P3.

Sorry for the bum steer...

73,

Tom Childers
Radio Amateur N5GE
Licensed since 1976
QCWA Life Member 35102
ARRL Life Member
Retired Professional
C# Software developer
http://www.n5ge.net

On Thu, 24 Feb 2011 12:29:23 -0500, [hidden email]  wrote:

>I have to ask, just how did you accomplish this with the P3?  Since  
>the P3 output comes off the radio before the "Roofing" filters are  
>inserted, the P3 should not show any result of filtering.
>
>Now, I managed to smooth out my filter gains by using Hamscope which  
>is an audio spectrum visualization tool.  This worked pretty well.
>
>Funny thing, my 200Hz fileter with a -86Hz offset is pretty well  
>centered about the centerline, but my 400 Hz 8-pole with 0 offset, is  
>way off center!  So are the 1.8 and 2.8 filters.  What gives....?
>
>
>...bc   nr4c
>
>
>
>Quoting Amateur Radio Operator N5GE <[hidden email]>:
>
>>
>> I used mine the other day to calibrate my filters gains.  It was easy to get
>> them all matched up using the XG2 and the amplitude scale.
>>
>> Another use I plan for it is to adjust the preamp's in my xv432,  
>> xv144 and other
>> devices with preamp's using the N-GEN.
>>
>> It should function very well as a piece of test gear too.
>>
>> 73,
>>
>> Tom Childers
>> Radio Amateur N5GE
>> Licensed since 1976
>> QCWA Life Member 35102
>> ARRL Life Member
>> Retired Professional
>> C# Software developer
>> http://www.n5ge.net
>>
>> On Wed, 23 Feb 2011 17:42:07 -0800 (PST), juergen  
>> <[hidden email]>  wrote:
>>
>>>
>>> Hi Bill
>>>
>>> The most logical next step would be transmit monitoring.
>>>
>>> I would like to see the facility for 2 directional couplers. One at  
>>> the output of the K3 and one at the output of the amp. It would  
>>> also be nice if you could have IN and OUT for these directional  
>>> couplers so that you could use it for  scope monitoring or for  
>>> inserting crystal notch filters inline for serious IMD monitoring  
>>> of your amp.
>>>
>>> How far the P3 evolves into test instrument or a toy accessory, is  
>>> really up to Elecraft. The P3 has sufficient performance to be a  
>>> test instrument rather than being just a toy bandscope. The review  
>>> in  QST alludes to this possibility.
>>>
>>> Telepost's new LP500  is where the P3 should be heading. However we  
>>> will just have to wait and see what comes out from the end of the  
>>> P3 engineering pipeline.
>>>
>>> My vote is for TX Monitoring and spectrum analyzer features. A  
>>> tracking generator  would be nice for homebrewers as well.
>>>
>>> 73
>>> John
>>> --- On Wed, 2/23/11, Bill <[hidden email]> wrote:
>>>
>>>> From: Bill <[hidden email]>
>>>> Subject: [Elecraft] P3, what lies ahead?
>>>> To: [hidden email]
>>>> Date: Wednesday, February 23, 2011, 2:13 PM
>>>>
>>>> Has anyone figured out the possible purpose of those unused
>>>> holes in the P3 backpanel?
>>>>
>>>> One of them labeled "sensor"  ???
>>>>
>>>> 73, K3UJ
>>>> ______________________________________________________________
>>>> 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
>>>>
>>>
>>>
>>>
>>> ______________________________________________________________
>>> Elecraft mailing list
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>>> 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
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>>
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>> Please help support this email list: http://www.qsl.net/donate.html
>>
>
>______________________________________________________________
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>
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Re: P3, what lies ahead?

Don Wilhelm-4
In reply to this post by Nr4c
  If you are using a filter width that is greater than about 1.5 times
your sidetone pitch, the filter must not be centered at your CW pitch -
it must be skewed so that you do not receive the opposite sideband.
That offset is done automatically in the K3.

73,
Don W3FPR

On 2/24/2011 12:29 PM, [hidden email] wrote:

> Now, I managed to smooth out my filter gains by using Hamscope which
> is an audio spectrum visualization tool.  This worked pretty well.
>
> Funny thing, my 200Hz fileter with a -86Hz offset is pretty well
> centered about the centerline, but my 400 Hz 8-pole with 0 offset, is
> way off center!  So are the 1.8 and 2.8 filters.  What gives....?
>
>
> ...bc   nr4c
>
>
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Re: P3, what lies ahead?

Nr4c
Thanks, Don.

I did not know this.  

...bill   nr4c

-----Original Message-----
From: Don Wilhelm [mailto:[hidden email]]
Sent: Thursday, February 24, 2011 6:12 PM
To: [hidden email]
Cc: [hidden email]
Subject: Re: [Elecraft] P3, what lies ahead?

  If you are using a filter width that is greater than about 1.5 times
your sidetone pitch, the filter must not be centered at your CW pitch -
it must be skewed so that you do not receive the opposite sideband.
That offset is done automatically in the K3.

73,
Don W3FPR

On 2/24/2011 12:29 PM, [hidden email] wrote:

> Now, I managed to smooth out my filter gains by using Hamscope which
> is an audio spectrum visualization tool.  This worked pretty well.
>
> Funny thing, my 200Hz fileter with a -86Hz offset is pretty well
> centered about the centerline, but my 400 Hz 8-pole with 0 offset, is
> way off center!  So are the 1.8 and 2.8 filters.  What gives....?
>
>
> ...bc   nr4c
>
>

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Re: P3, what lies ahead?

Jack Brabham KZ5A
There was a comment by Wayne on a recent similar thread which intimated
that some level of P3 integration with the station PC is being
developed, or at least that is what I read into the comment.

I expect to purchase a P3 at some point, but am inclined to wait until
the product matures a bit and the level of functionality improves.   In
particular, I'm looking for the ability to port the display to the PC so
I can enlarge it enough to be readable with my old eyes and the ability
to do point and click tuning.

Actually, a no display, PC only version of the P3 would be very
interesting, especially if it got a little less expensive in the process
of loosing it's local display and knobs.


73 Jack KZ5A

K3 #4165







On 2/25/2011 3:26 PM, Bill Conkling wrote:

> Thanks, Don.
>
> I did not know this.
>
> ...bill   nr4c
>
> -----Original Message-----
> From: Don Wilhelm [mailto:[hidden email]]
> Sent: Thursday, February 24, 2011 6:12 PM
> To: [hidden email]
> Cc: [hidden email]
> Subject: Re: [Elecraft] P3, what lies ahead?
>
>    If you are using a filter width that is greater than about 1.5 times
> your sidetone pitch, the filter must not be centered at your CW pitch -
> it must be skewed so that you do not receive the opposite sideband.
> That offset is done automatically in the K3.
>
> 73,
> Don W3FPR
>
> On 2/24/2011 12:29 PM, [hidden email] wrote:
>> Now, I managed to smooth out my filter gains by using Hamscope which
>> is an audio spectrum visualization tool.  This worked pretty well.
>>
>> Funny thing, my 200Hz fileter with a -86Hz offset is pretty well
>> centered about the centerline, but my 400 Hz 8-pole with 0 offset, is
>> way off center!  So are the 1.8 and 2.8 filters.  What gives....?
>>
>>
>> ...bc   nr4c
>>
>>
> ______________________________________________________________
> 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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Re: P3, what lies ahead?

Edward R Cole
In reply to this post by Able2fly
Jack,

There are several soundcard programs available to view spectrum, but
this restricts one to the passband of the radio (13-KHz for the
K3).  P3 accesses wideband RF via the K3-IF.  This requires a
conversion to IQ which any SDR can do (Soft-rock, LP-Pan, SDR-IQ,
etc.), so one is not limited to a "black-box" version of the P3
(though, I can see that it could be desirable).

To have the features of the P3 on a PC will not only require the
hardware to produce IQ streams, but the P3 sw in a form that can be
run on a PC.  Not owning a P3, I am limited in knowledge of the
features of the P3 and whether it use a separate mcu and firmware like the K3.

My alternative to the P3 was to get the LP-Pan (black-box IQ
converter) which I am running Spectravue (free download from RFSpace,
who make the SDR-IQ).  PowerSDR (from the Flex folks) will run with
the LP-Pan.  I am endeavoring to run Linrad (originally Linux-Radio)
which is complicated to set up but has powerful noise-reduction and
weak-signal performance.

73, Ed - KL7UW
------------------------------

Message: 6
Date: Sat, 26 Feb 2011 13:36:50 -0600
From: Jack Brabham <[hidden email]>
Subject: Re: [Elecraft] P3, what lies ahead?
To: [hidden email]
Message-ID: <[hidden email]>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

There was a comment by Wayne on a recent similar thread which intimated
that some level of P3 integration with the station PC is being
developed, or at least that is what I read into the comment.

I expect to purchase a P3 at some point, but am inclined to wait until
the product matures a bit and the level of functionality improves.   In
particular, I'm looking for the ability to port the display to the PC so
I can enlarge it enough to be readable with my old eyes and the ability
to do point and click tuning.

Actually, a no display, PC only version of the P3 would be very
interesting, especially if it got a little less expensive in the process
of loosing it's local display and knobs.


73 Jack KZ5A

K3 #4165










73, Ed - KL7UW, WD2XSH/45
======================================
BP40IQ   500 KHz - 10-GHz   www.kl7uw.com
EME: 144-1.4kw, 432-100w, 1296-testing*, 3400-winter?
DUBUS Magazine USA Rep [hidden email]
======================================
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Re: P3, what lies ahead?

Jack Brabham KZ5A
In reply to this post by Jack Brabham KZ5A
I have an LP-PAN PSDR/IF setup.

Works very well but has integration issues and limitations with the K3
that could be solved with a blackbox P3.

What I described would make the P3 more useful than it can ever be while
limited to a small screen and little PC integration.

Its probably too complex a software project so I'm not holding my breath.

BTW I have a SDR... the K3 is essentially a SDR with a convenient
"Analog Front Panel Accessory".

73 Jack KZ5A






On 2/26/2011 2:21 PM, The Smiths wrote:

> Sounds to me like you're looking for LP Pan, not the P3.  What you
> described is an entire other beast.
>
> > Date: Sat, 26 Feb 2011 13:36:50 -0600
> > From: [hidden email]
> > To: [hidden email]
> > Subject: Re: [Elecraft] P3, what lies ahead?
> >
> > There was a comment by Wayne on a recent similar thread which intimated
> > that some level of P3 integration with the station PC is being
> > developed, or at least that is what I read into the comment.
> >
> > I expect to purchase a P3 at some point, but am inclined to wait until
> > the product matures a bit and the level of functionality improves. In
> > particular, I'm looking for the ability to port the display to the
> PC so
> > I can enlarge it enough to be readable with my old eyes and the ability
> > to do point and click tuning.
> >
> > Actually, a no display, PC only version of the P3 would be very
> > interesting, especially if it got a little less expensive in the
> process
> > of loosing it's local display and knobs.
> >
> >
> > 73 Jack KZ5A
> >
> > K3 #4165
> >
> >
> >
> >
> >
> >
> >
> > On 2/25/2011 3:26 PM, Bill Conkling wrote:
> > > Thanks, Don.
> > >
> > > I did not know this.
> > >
> > > ...bill nr4c
> > >
> > > -----Original Message-----
> > > From: Don Wilhelm [mailto:[hidden email]]
> > > Sent: Thursday, February 24, 2011 6:12 PM
> > > To: [hidden email]
> > > Cc: [hidden email]
> > > Subject: Re: [Elecraft] P3, what lies ahead?
> > >
> > > If you are using a filter width that is greater than about 1.5 times
> > > your sidetone pitch, the filter must not be centered at your CW
> pitch -
> > > it must be skewed so that you do not receive the opposite sideband.
> > > That offset is done automatically in the K3.
> > >
> > > 73,
> > > Don W3FPR
> > >
> > > On 2/24/2011 12:29 PM, [hidden email] wrote:
> > >> Now, I managed to smooth out my filter gains by using Hamscope which
> > >> is an audio spectrum visualization tool. This worked pretty well.
> > >>
> > >> Funny thing, my 200Hz fileter with a -86Hz offset is pretty well
> > >> centered about the centerline, but my 400 Hz 8-pole with 0 offset, is
> > >> way off center! So are the 1.8 and 2.8 filters. What gives....?
> > >>
> > >>
> > >> ...bc nr4c
> > >>
> > >>
> > > ______________________________________________________________
> > > 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
> > >
> >
> > ______________________________________________________________
> > 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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Re: P3, what lies ahead?

N5GE

It would be really be nice if they had designed the P3 with a cutout in the rear
for an External Display.  That way they could add an external video output at a
later time.

Tom, N5GE

On Sun, 27 Feb 2011 23:42:48 -0600, Jack Brabham <[hidden email]>  wrote:

>I have an LP-PAN PSDR/IF setup.
>
>Works very well but has integration issues and limitations with the K3
>that could be solved with a blackbox P3.
>
>What I described would make the P3 more useful than it can ever be while
>limited to a small screen and little PC integration.
>
>Its probably too complex a software project so I'm not holding my breath.
>
>BTW I have a SDR... the K3 is essentially a SDR with a convenient
>"Analog Front Panel Accessory".
>
>73 Jack KZ5A
[snip]

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Re: P3, what lies ahead?

Scott Ellington
They did!

Scott  K9MA

On Feb 28, 2011, at 10:56 AM, Amateur Radio Operator N5GE wrote:

> It would be really be nice if they had designed the P3 with a cutout in the rear
> for an External Display.  That way they could add an external video output at a
> later time.
>
> Tom, N5GE

Scott Ellington
Madison, Wisconsin
USA



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Re: P3, what lies ahead?

Jack Brabham KZ5A
In reply to this post by Edward R Cole
Ed,

I run LP-PAN and PSDR/IF and find them indispensable, particularly
during contests.   These days it doesn't feel like the K3 is fully "ON"
until PSDR/IF comes up.   On the other hand, I'm always looking for ways
to reduce the number of boxes and software packages in use.

Exporting analog IQ signals from the P3 does not appear to be terribly
useful as this just makes the P3 an equivalent to LP-PAN and would still
require PSDR/IF and EMU 0202 or something similar.

 From my limited understanding, one of the operational advantages of the
P3 is that it is not tied to traditional sound card scan frequencies,
192 kb, 96 kb, etc., a big P3 plus that would be lost.

My idea is more along the line of leaving everything except the display
and user interface physically in the P3 "Blackbox" and replacing those
with a PC application that provides the display and controls.    That
way the tight integration with the K3 is maintained and is enhanced by
the addition direct integration with the PC.  For instance the "point
and click" tuning that is sooo useful when S&P'ing a band would become a
P3 feature (I realize that it can "sort of" do that now).   Point and
click tuning combined with the P3's unique ability to fix the displayed
segment and let the VFO cursors "float" would a wet dream setup for RTTY
contesting.

PSDR/IF makes a valiant effort  to "approach" that idea, but has some
significant limitations due to being fundamentally designed for a
different radio.   IMHO it also suffers from being too "SDR-centric",
for example when there are conflicts between the radio's setting and
PSDR/IF's, PSDR/IF will resolve them in it's favor rather than following
the K3.    Consequently I have to leave a some of PSDR/IF's "features"
disabled to get it to "follow" instead of "lead".   The base program was
designed to support a blackbox SDR (Flex) with no physical controls, so
that is understandable but still a problem.

While I'm wishing, if the blackbox P3 fit inside the K3 it would be
really great.  Maybe with a new KIO3 that had (gasp) a USB connector.

 From a customer perspective, I would find a blackbox P3 with an
associated PC application a much more compelling and valuable product.

73 Jack KZ5A
















On 2/27/2011 12:14 PM, Edward R. Cole wrote:

> Jack,
>
> There are several soundcard programs available to view spectrum, but
> this restricts one to the passband of the radio (13-KHz for the
> K3).  P3 accesses wideband RF via the K3-IF.  This requires a
> conversion to IQ which any SDR can do (Soft-rock, LP-Pan, SDR-IQ,
> etc.), so one is not limited to a "black-box" version of the P3
> (though, I can see that it could be desirable).
>
> To have the features of the P3 on a PC will not only require the
> hardware to produce IQ streams, but the P3 sw in a form that can be
> run on a PC.  Not owning a P3, I am limited in knowledge of the
> features of the P3 and whether it use a separate mcu and firmware like the K3.
>
> My alternative to the P3 was to get the LP-Pan (black-box IQ
> converter) which I am running Spectravue (free download from RFSpace,
> who make the SDR-IQ).  PowerSDR (from the Flex folks) will run with
> the LP-Pan.  I am endeavoring to run Linrad (originally Linux-Radio)
> which is complicated to set up but has powerful noise-reduction and
> weak-signal performance.
>
> 73, Ed - KL7UW
> ------------------------------
>
> Message: 6
> Date: Sat, 26 Feb 2011 13:36:50 -0600
> From: Jack Brabham<[hidden email]>
> Subject: Re: [Elecraft] P3, what lies ahead?
> To: [hidden email]
> Message-ID:<[hidden email]>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> There was a comment by Wayne on a recent similar thread which intimated
> that some level of P3 integration with the station PC is being
> developed, or at least that is what I read into the comment.
>
> I expect to purchase a P3 at some point, but am inclined to wait until
> the product matures a bit and the level of functionality improves.   In
> particular, I'm looking for the ability to port the display to the PC so
> I can enlarge it enough to be readable with my old eyes and the ability
> to do point and click tuning.
>
> Actually, a no display, PC only version of the P3 would be very
> interesting, especially if it got a little less expensive in the process
> of loosing it's local display and knobs.
>
>
> 73 Jack KZ5A
>
> K3 #4165
>
>
>
>
>
>
>
>
>
>
> 73, Ed - KL7UW, WD2XSH/45
> ======================================
> BP40IQ   500 KHz - 10-GHz   www.kl7uw.com
> EME: 144-1.4kw, 432-100w, 1296-testing*, 3400-winter?
> DUBUS Magazine USA Rep [hidden email]
> ======================================
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Re: P3, what lies ahead?

Nr4c
In reply to this post by Scott Ellington
Scott....

Where?  I have a hole in the case marked "DISPLAY".  I have not been able to
plug a monitor cable in that hole and get any video display.

...bc  nr4c

-----Original Message-----
From: Scott Ellington [mailto:[hidden email]]
Sent: Monday, February 28, 2011 12:00 PM
To: Elecraft list
Subject: Re: [Elecraft] P3, what lies ahead?

They did!

Scott  K9MA

On Feb 28, 2011, at 10:56 AM, Amateur Radio Operator N5GE wrote:

> It would be really be nice if they had designed the P3 with a cutout in
the rear
> for an External Display.  That way they could add an external video output
at a
> later time.
>
> Tom, N5GE

Scott Ellington
Madison, Wisconsin
USA



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Re: P3, what lies ahead?

Bill K9YEQ
It is a future plan.  

Bill
K9YEQ


-----Original Message-----


Scott....

Where?  I have a hole in the case marked "DISPLAY".  I have not been able to
plug a monitor cable in that hole and get any video display.

...bc  nr4c

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12