Don,
No, it isn't the same at all and I don't understand why you think it
is. Your brain may be able to discern differences in phase and try to
focus in on one signal versus others, but it isn't going to do any of
these things:
1. Actually amplify a desired signal (probably 2 to 3 db) at the
expense of other signals or generalized noise from other directions.
Hams who put up phased verticals don't do it strictly for the transmit gain.
2. Totally null out an offending signal or noise from a particular
direction. Your brain most certainly can't do this.
3. Give you angle measurements in degrees.
As I said, I consider the add/subtract ability (#1 and #2) to be more
useful than the simple display of the phase difference (#3), but we
could have both.
Check this out .... https://tinyurl.com/ydfvcauz
It's a hardware implementation of pretty much the same as I'm proposing
Elecraft do in software, and the hardware version goes for $750.
Dave AB7E
On 1/12/2019 3:19 PM, Don Wilhelm wrote:
Dave,
Using Diversity Receive, the human brain does that automatically (but
not with the numbers). You can sort out both signals and
automatically pick the best one or a blend of the two. This is an
unconscious process.
The name of the game is communications, not looking at numbers
representing the two signals or the difference between them.
To analyze and display the differences may be useful in a lab setting,
but not of much use for quickly picking the best path for a QSO.
Just my opinion.
73,
Don W3FPR
On 1/12/2019 5:06 PM, David Gilbert wrote:
I know Wayne requested direct replies to his query and I've already
done that, but I have a serious suggestion and I'm curious if others
here would be interested. Here it is:
===
The two receivers in a K3 or K3s can be phase locked for diversity
reception, and the new synths preserve that phase lock even with a
change in frequency. Since the relative phase of an incoming signal
presented to the two receivers is preserved during down conversion,
it is possible to capture that phase difference even in the audio
chain. Once that phase difference is known, it should be possible to:
1. Display the difference. This would allow a user to put up two
vertical sense antennas to determine the azimuth of an incoming
signal (albeit with a potential mirror image uncertainty). Or put up
two horizontal sense antennas to display the arrival angle of an
incoming signal.
2. Better yet, it should be possible to adjust the relative phase
and amplitude of an incoming signal from the two antennas, then
either add them or subtract one from the other to either peak a
desired signal or null an interfering signal (including a source of
noise, man made or atmospheric).
===
There are commercially available pieces of hardware from various ham
suppliers that perform this same function except at RF (which is more
difficult), and they cost several hundreds of dollars. It seems to
me that any K3s, or K3 with the new synths, should be able to do the
same thing virtually for free.
73,
Dave AB7E
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