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Re: [IRCA] I found some Aussie audio on 612 from this morning.
I seem to recall this topic being batted around when phasing two
antennas with SDR was being addressed?
The AFEDRI Dual Channel SDR (AFE822x SDR-Net) allows diversity
reception (two SDRs set to the same center frequency and same
bandwidth, coherently synchronized) The company provides only
hardware (check http://afedri-sdr.com/index.php/ordering-information
for details); they say that the software to do this includes HDSDR +
SDR_Control (SDR-Control is provided by Afedri), PowerSDR_mrx and
Linrad, with phasing addressed, though I have no personal experience
with any of this. Someday...
The X2 option for RFSpace's NetSDR provides similar functionality,
but doesn't seem to be widely available. I believe Gnuradio
supports it, if Linux is your cup of tea. Simon Brown was at one
time working towards providing support, including phasing, for the X2
in his SDR-Console, but he seems to have a lot on his plate. I've
also seen a variant of CuteSDR that supports about 150kHz of
bandwidth with the X2 with phasing control.
best wishes,
Nick
At 15:32 29-09-16, Mark wrote:
Somebody should come up with an SDR that allows stereo reception by
having two internal phased-locked receivers fed by two separate antennas.
In this area, for instance, if using two bidirectional loops such as
ALA-1530's (one N-S, one E-W), you could record the band mid-evening
with the N-S loop on the "left" radio and the E-W on the "right" one.
The replay would show the two received spectrum plots and, out of
your headphones, would be the audio on a given frequency with the
appropriate antenna feed contribution going to the appropriate ear.
On 700 here for instance, the left (N-S) headphone would mostly be
giving you Colombia over Brazil and the right (E-W) headphone mostly WLW.
Of course another thing that would be cool would be if the receiver
could phase Antenna A against Antenna B, eliminating the need for
outboard boxes.
Maybe such a receiver already exists?
Mark Connelly, WA1ION
South Yarmouth, MA
<<
Congrats on the Aussies, Kaz! Nothing nearly as good here on my unattended
recordings I made from 1045-1200 UTC this morning. Lots of high band DU
carriers in the usual places but nothing close to approaching audio from my
D-KAZ aimed due north. Low band DU hets (and the rare audio) like your
612, 702 & 738 always favor my southwest BOGs, and high band stuff is
always better on the north D-KAZ. I'm beginning to think two SDRs would be
nice for unattended recordings :-)
73,
Tim Tromp
West Michigan
On Wed, Sep 28, 2016 at 7:24 PM, Neil Kazaross <neilkaz58@xxxxxxxxx> wrote:
> Finally after 15 years of trying on 612, I can copy a woman interviewing a
> man at 1148. both Aussie accented.
>
> In theory I'd expected 612 to be one of the easiest Aussies as they are 50
> kW and close to the coast and closer to the US than some others, but that
> hasn't been the case, although none are anything resembling easy.
>
> 73 KAZ Barrington IL Perseus and DKAZ aimed due west.
>>
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Nick Hall-Patch
Victoria, BC
Canada
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