[Elecraft] K3 & SDR/IQ

amsctalx at comcast.net amsctalx at comcast.net
Wed Jun 26 15:50:11 EDT 2013 

It didn't at the time that I sold mine - it would simply "top out" at 30 MHz. Thanks for the update. 


Mike Alexander - N8MSA 

amsctalx at comcast.net 

----- Original Message -----
From: "Joe Subich, W4TV" <lists at subich.com> 
To: elecraft at mailman.qth.net 
Sent: Wednesday, June 26, 2013 3:46:19 PM 
Subject: Re: [Elecraft] K3 & SDR/IQ 


> SpectraView's HF tracking mode doesn't allow for an IF tuning offset 
> on frequencies higher than the design limit of the SDR-IQ itself. I 
> know the IF frequency is well below that, but the software was never 
> supported "tracking panadapter" operation on 6M to the best of my 
> knowledge. You can still see the IF spectrum, but you won't have a 
> operator-transparent tracking ability. 

Fortunately, that information is incorrect. I just retrieved my SDR-IQ 
from the shelf, connected it to the IF loop on my P3, loaded SpectraVue 
set the External Radio/Panadapter Setup as recommended in the SV help 
file and was running with a "tracking panadapter" on six meters. 

I used the 2nd CAT port capability in microHAM USB Device Router to 
provide the serial splitter function and the K3 tracks clicks in the 
SV spectrum/waterfall and SV tracks frequency changes from VFO A on 
the K3. Operation is the same on 6 meters as on 160 through 10. 

The only issue is the constantly changing IF offset in the K3 (IS) 
which SpectraVue does not track. This results in a variable frequency 
error based on mode. 

73, 

... Joe, W4TV 


On 6/26/2013 2:21 PM, amsctalx at comcast.net wrote: 
> SpectraView's HF tracking mode doesn't allow for an IF tuning offset on frequencies higher than the design limit of the SDR-IQ itself. I know the IF frequency is well below that, but the software was never supported "tracking panadapter" operation on 6M to the best of my knowledge. You can still see the IF spectrum, but you won't have a operator-transparent tracking ability. 
> 
> See the Yahoo SDR-IQ group thread on the topic here: 
> 
> http://groups.yahoo.com/group/SDR-IQ/message/6543 
> 
> 
> Mike Alexander - N8MSA 
> 
> amsctalx at comcast.net 
> 
> ----- Original Message ----- 
> From: "Joe Subich, W4TV" <lists at subich.com> 
> To: elecraft at mailman.qth.net 
> Sent: Wednesday, June 26, 2013 2:04:31 PM 
> Subject: Re: [Elecraft] K3 & SDR/IQ 
> 
> 
> On 6/26/2013 1:43 PM, Wes Stewart wrote: 
>> LP-Bridge will handle the serial port issue. 
> 
> Maybe - if none of your software uses one of the commands that 
> LP-Bridge blocks or modifies. The N1MM Logger support team will not 
> even accept bug reports if LP-Bridge is involved - any bug must be 
> duplicated and documented with LP-Bridge removed due to the known 
> issues. 
> 
> 73, 
> 
> ... Joe, W4TV 
> 
> 
> On 6/26/2013 1:43 PM, Wes Stewart wrote: 
>> LP-Bridge will handle the serial port issue. I run the K3, Spectravue, DXBase and N1MM with one USB to Serial adapter and ports to spare. 
>> 
>> 
>> --- On Tue, 6/25/13, Joe Subich, W4TV <lists at subich.com> wrote: 
>> 
>>> From: Joe Subich, W4TV <lists at subich.com> 
>>> Subject: Re: [Elecraft] K3 & SDR/IQ 
>>> To: elecraft at mailman.qth.net 
>>> Date: Tuesday, June 25, 2013, 8:09 PM 
>>> 
>>>> So how do yu set it up to watch lower end of 6m on the 
>>> K3, without 
>>>> using a transverter? 
>>> 
>>> Connect SDR-IQ to the IF Out jack (not the RX Ant) and tune 
>>> SpectraVue 
>>> to 8.125 MHz manually *or* in SV's "ExtRadio Setup" Select 
>>> the K3 and 
>>> uncheck "HF Tracking Mode." 
>>> 
>>> Note: If you want to use the frequency tracking tied to the 
>>> IF, you 
>>> will need some kind of serial splitter to share the K3 
>>> serial port. 
>>> For more information see the SpectraVue Help file section 
>>> 4.2, page 
>>> 59 and page 58 "IF Tracking". 
>>> 
>>> 73, 
>>> 
>>> ... Joe, W4TV 
>>> 
>>> 
>>> On 6/25/2013 9:55 PM, KD7YZ Bob wrote: 
>>>> Howdy K3' people: 
>>>> 
>>>> I have an SDR/IQ. I also have three Elecraft 
>>> transverters. When I 
>>>> connect a BNC to the BNC-RX "T" chain, and I tune 
>>> Spectravue to 28.07 
>>>> and the 6m xv50 transverter is "on", I am looking at 
>>> the area around 
>>>> 50.070 .. I can look for beacons and Sporadic-E 
>>> openings. 
>>>> 
>>>> Nothing new. 
>>>> 
>>>> However, the other day, I suspected the xv50 
>>> transverter to on the 
>>>> Fritz. So I switched to the internal 6m Rx/Tx section. 
>>> Made some 
>>>> contacts. 
>>>> 
>>>> So now I want to once again look for 6m Beacons down 
>>> below 50.080 . 
>>>> My only option seems to be the IF BNC output. 
>>>> 
>>>> I connected there and tried to set Spectravue for 
>>> 8.215; 10.0; 28.0 and 
>>>> still see nothing from 6m. I even tried to set it at 
>>> 50.10, to no avail. 
>>>> 
>>>> So how do yu set it up to watch lower end of 6m on the 
>>> K3, without 
>>>> using a transverter? 
>>>> 
>>>> thanks 
>>>> 
>>>> 
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