[Elecraft] Computer-Assisted Diversity Reception

[Dave Fugleberg]

Good morning David!
I was intrigued by your video. I had intended to just jump to the demo, but
I got sucked in and watched the whole thing.

I’ve often wondered if such a thing could be done in a practical way- looks
like you proved that it can.

I have a few questions:
1. How critical is the type and placement of the two antennas? Do they need
to be identical? Any proximity constraints?

2. How much audio delay is introduced on a received signal as compared to
the audio output of the rig itself? In other words, is it useable when in
an actual QSO, or is the delay objectionable?

3. I assume any phase-locked dual-receiver rig should work- do you know
whether it has been successfully used with a SDRPlay RSPDuo ? I have one of
those lying around unused at the moment, so I will give this a go when I
get time to do so.

Thanks for your time. Great work!

73 de W0ZF


On Fri, May 22, 2026 at 2:36 AM David Gilbert via Elecraft <
elecraft at mailman.qth.net> wrote:

>
> I recently posted a link to a video of a browser-based application I
> created with the help of ChatGPT to enhance diversity reception. I've
> made a couple of significant improvements to the application (which
> happens to be completely free of charge) so I uploaded a new video that
> illustrates how well it can be used to separate signals from other
> signals, or from noise.
>
> https://youtu.be/DfEjzlANWAw
>
> If you don't watch any other part of it, check out the segment starting
> at 29:15.
>
> To use this app you simply feed the normal stereo diversity audio (Line
> Out) from the phase locked receivers into the Line In port of a computer
> sound card.  The application does the rest.
>
> I can't think of a single reason why this same kind of processing
> couldn't be built right into a modern SDR-based rig.  I've argued that
> point here for several years now.
>
> Dave   AB7E
>
>
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