Re: [IRCA] phasing units, then and now

[Les Rayburn <les@xxxxxxxxxxxxxxxx>]

Guy,

I own an SDRPlay RSP-1 Pro and an RSP-2 Pro, still waiting to install them and experiment with SDRUno. My plan was to be set up to record the entire FM band on I/Q output for this season, but that hasnât happened yet. 

Iâm also eying the SDRDuo for the phasing possibilities. This is intriguing for both AM and FM DXing and I hope they implement this option in the software soon. Also hopeful that Simon will implement this option in SDR-Console at some point in the future. How that guy keeps up is beyond me! 




73,

Les Rayburn, N1LF
121 Mayfair Park
Maylene, AL 35114
EM63nf

Member WTFDA, IRCA, NRC. Former CPC Chairman for NRC & IRCA. 

Elad FDM-S2 SDR, AirSpy SDR2, SDRPlay RSP-2 Pro, Sony XDR-F1HD, Dennon TU-1500RD, Sangean HDT-1, Ray Dees RDS Decoders,
Korner 9.2 Antenna, FM-6 Antenna, Quantum Phaser, Wellbrook ALA1530 Loop, Wellbrook Flag, Clifton Labs Active Whip. 

âNothing but blues and Elvis, and somebody elseâs favorite songââ 


> On Jul 9, 2018, at 1:59 PM, Guy Atkins <dx@xxxxxxxxxxxxx> wrote:
> 
> Hi Mark,
> 
> That was an excellent overview of DX hobbyist use of phasers! You covered
> the early history which I wasn't aware of, as I was mostly DXing on the
> tropical bands when Gordon Nelson and others did their pioneering work.
> 
> There is one more phase (LoL) developing now--software based methods using
> coherent dual tuners (or channels).â I'm sure you're aware of Afedri's AFE822x
> SDR-Net device
> <http://www.afedri-sdr.com/index.php/new-afe822x-sdr-net-dual-channel>. It
> was introduced a couple of years ago, but unfortunately software has not
> appeared to easily take advantage of phasing. If you jump through a lot of
> hoops and complexities with LINRAD, you can catch a glimpse of the future
> of software phasing, but it's nothing practical for a DXer's use in my
> opinion.
> 
> Much more recently, SDRplay's RSPduo <https://www.sdrplay.com/rspduo/> was
> introduced with its dual tuners. I have one myself, mainly for its future
> possibilities. I'm hoping that the 14-bit structure and additional front
> end filters will provide better basic performance than earlier RSP models
> I've owned.I expect it to be neck-and-neck with the AirSpy HF+ SDRs in a
> quiet DXpedition setting...maybe not so much in my suburban RF jungle.
> 
> SDRplay looks to be the most active of all the SDR software developers, and
> they say they fully intend to offer phasing features in a future release of
> SDRuno software. Their activity, enthusiasm, and customer support make me
> think they are the group most likely to take software phasing out of the
> laboratory and into the DXer's shack. If he has the time and inclination,
> Simon Brown of SDR-Console software could implement RSPduo phasing too, but
> he's *not* dropped any hints about this.
> 
> 73,
> 
> Guy Atkins
> Puyallup, WA
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