[Elecraft] Fwd: WSPR & Diversity RX

[Guy Olinger K2AV]

True diversity in digital modes requires TWO decoders running plus a
secondary comparator to somehow decide between the two decoded streams.

If you simply combine two audio streams there can be phase cancellation,
noise on one channel ruining both, and other issues.

In contrast it's simply marvelous what our brains can do when left ear is
listening to main RX and right ear is listening to sub RX locked to main RX
frequency and RF/AF gains and AGC are set to create a "sound stage".

Signals come from a point on the sound stage and noise is spread around.
Signals in a pileup can spread around the stage. And since it has the
normal "spatial spread" that we hear in normal life it's easier to listen
to, less tiring.

These are significant advantages that only apply in part to digital mode
where the specific and nasty programming has actually been done. Check your
third party digital decoding program's user's manual but don't hold your
breath.

Would be great if someone actually took that on.

73, Guy K2AV


On Saturday, October 1, 2016, MaverickNH <cbjesseeNH at comcast.net> wrote:

> Hi Don, I thought that might be the case. Might there be a way to run from
> stereo headphone output to a mixed mono signal and feed the soundcard's
> left
> channel? The WSJT-X/WSPR decoder is pretty good, so I thought any very,
> very
> weak wavering signal that was received deferentially L/R on each antenna
> might combine to be decoded better.
>
> BRET/N4SRN
>
>