[Elecraft] New DSP Idea

[David Gilbert]

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