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The consensus seems to be that nobody's yet doing after-the-fact phasing that
works in an intuitive, relatively easy to use, non-geeky way.
We've seen great strides in SDR technology over the past ten years but,
possibly due to declining interest in medium wave and shortwave, we might not
see the will of manufacturers to advance things to the next level. Reliable
after-the-fact phasing is certainly one of the "next big things" but I wonder
if this is such a specialized / niche interest that the considerable amount of
work needed to make it happen may never occur. Or things stay at the geek level
with 10 different incompatible solutions all requiring C++/Java proficiency and
none having more than a half dozen users.
Could some other aspect of the SDR use such as FM DX or VHF (and up) utilities
be the thing that gets phasing in capture files off the launch pad? If the user
bases in those parts of the hobby are larger and younger than the MW/SW
contingent, maybe so.
Mark Connelly, WA1ION
South Yarmouth, MA
-----Original Message-----
From: dai...@yahoo.com [CapeDX] <cap...@yahoogroups.com>
To: CapeDX <cap...@yahoogroups.com>
Sent: Wed, Jan 16, 2019 12:17 pm
Subject: [CapeDX] Re: dual receiver SDRs for diversity reception / phasing
It is my understanding that Linrad can record the 2 inputs of an Afedri, or
any two independent RF streams for that matter, into R/L channels of a
recording for 'after-the-fact' nulling and playback. Done that way, the 2
streams are synchronized. I have not explored this at all, since quite frankly
I find Linrad painfully complex to use. Regardless of Linrad's potential
function, none of the existing digital phasing software is easy or 'fun' to
use. I guess it will take more interest from DX'ers like us to create a strong
enough need to do it right.
My interest has been more around curiosity at this point, although the Afedri
822X does work well to make 'fixed phase' captures of MW. It's span size will
allow a capture of 530Khz to 1620Khz, for example. You set the nulling up ahead
of time to do scheduled recordings later. And yes you are right, this only
eliminates an external phaser box and some of the losses from analog phasing,
done the way I am using it.
Dave Aichelman N7NZH Grants Pass, Oregon
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