[Elecraft] Diversity receive versus QRM eliminators

[Hank]

Using something like the MFJ-1026 works well for me, BUT the 2 receceiving antennas must be similar to work well in my experience - i.e. 2 dipoles or 2 verticals with similar gain characteristics to get the most out of the little black box.

Hank
K4HYJ


----- Original Message -----
From: gt-i at gmx.net
Date: 06/29/20 13:19
To: Elecraft Reflector (elecraft at mailman.qth.net)
Subject: [Elecraft] Diversity receive versus QRM eliminators

Hello all,
In a recent rush to eliminate urban noise I bought an QRM eliminator.
The working principle is to null out signals by shifting the phases of
two antennas (one main/tx and one rx). I can see the effect sometimes,
but it is not the holy grail for all types of QRM. I still don't get rid
of the PSU/LED/plasmaish noise here, sometimes the S/N is a bit better
but maybe thats my inner impression to justify buying this thing.
Now, I do wonder how this differs from diversity receive, effectively
versus local QRM.
Note I have a 10m vertical as the 2nd ant, while the main ant is horizontal.
Any thoughts or hints ?
tnx 73 Gernot DF5RF


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