[Elecraft] K3/0 all in one box? + P3/0

Harry Yingst via Elecraft elecraft at mailman.qth.net
Wed Jan 14 19:10:50 EST 2015


I have another soft-rock kit coming (I foolishly sold my last one)
I've been thinking about tinkering around around with having the remoting it as a bit of a proof of concept.
Now if I can only find the time to put it together..... after all the other projects that I have simmering





      From: Walter Underwood <wunder at wunderwood.org>
 To: Elecraft Reflector <elecraft at mailman.qth.net> 
 Sent: Wednesday, January 14, 2015 5:00 PM
 Subject: Re: [Elecraft] K3/0 all in one box? + P3/0
   
Two channels of 16-bit 192kHz audio compressed with FLAC should use around 500kbits/s. That is a chunk of bandwidth, but it is fairly reasonable for a remote site. Lossy compression would use less bandwidth, but it would put an artificial noise floor on the spectrum display. Probably not a good experience.

wunder
K6WRU
CM87wj
http://observer.wunderwood.org/

On Jan 14, 2015, at 1:51 PM, iain macdonnell - N6ML <ar at dseven.org> wrote:

> I did experiment with this concept a couple of years ago. At the
> remote site, I captured I/Q from a LP-Pan to a sound card, using ulaw,
> and streamed that to the local PC, where I fed it (via VAC, I think)
> into some "SDR" software (maybe NaP3). It worked, but it was a
> bandwidth-hog. To get 192kHz with 16-bit samples, I think that adds up
> to 6Mbps. I suspect that not many remote sites have that sort of
> upstream b/w available....
> 
> 73,
> 
>    ~iain / N6ML
> 
> 
> On Wed, Jan 14, 2015 at 5:19 AM,  <kb2m at arrl.net> wrote:
>> Sorry for my confusion, I was thinking IQ as the usable form of IF at the
>> control site, not the raw 8 mHz IF. My idea would be to somehow get the IQ
>> output from a LP-Pan or similar device, add another box on either end to
>> send and receive the IQ data, then simply use the control stations computer
>> soundcard and run your panadapter software of choice. Only problem here is I
>> don't have a clue on what to use for the remoting of the IQ output from the
>> LP-Pan...
>> All this non-portable, not suited for hotel room use would work for me as I
>> will be at a desktop computer for 6 months or so while remoting from my
>> summer home.
>> And of course to not stray from the original topic, it would be nice to
>> have the control station use a P3 with the extra data lines intergraded into
>> the 1258, or K3/0 mini mark II  :-).
>> 
>> 
>> 73 Jeff kb2m
>> 
>> -----Original Message-----
>> From: Elecraft [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Fred
>> Jensen
>> Sent: Tuesday, January 13, 2015 19:59 PM
>> To: elecraft at mailman.qth.net
>> Subject: Re: [Elecraft] K3/0 all in one box? + P3/0
>> 
>> Hmmm ... K3 1st IF is ~8 MHz.  Could pose some problems for generally
>> available "<something>overIP" for many people.  I/Q sounds like a better way
>> to go with a PX3?  I guess that would require an outboard quadrature demod
>> at the "real" K3.
>> 
>> While I don't do remote stuff right now, we're eventually going to have to
>> sell our 5 ac and move to a 1-story house, probably with CC&R's.
>> Consequently, remote operation may be a part of my future.  Since I got the
>> P3, it is the almost total focus of my concentration when operating ... I
>> would hate to lose the functionality.
>> 
>> 73,
>> 
>> Fred K6DGW
>> - Northern California Contest Club
>> - CU in the 50th Running of the Cal QSO Party 3-4 Oct 2015
>> - www.cqp.org
>> 
>> On 1/13/2015 3:27 PM, Harry Yingst via Elecraft wrote:
>>> When you stop and think about it I really wonder if they could make a
>>> P3/0 For the most part much of the P3 screen does not change at any
>>> given moment.so if they only send the changes I would venture to say
>>> that much of it could besent over the wire much as we now send Voice
>>> Over IP. Using the current chips for multimedia and possible some of
>>> the open source CODEXsit may be a workable item, though I would expect
>>> it to me a bit off a pricey option
>> 
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