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diversity reception notes
I must be doing something wrong.
Frequency 6.486MHz (BTW arabic male) I first tried 2 active dipoles seperated by 100' on a north to south line. Next I tried a 50' wire 6' off the ground with a WinRadio WR-LWA-0130 "long wire adpator, with either of the active dipoles, then I ran another 50' at right angles for the first, also with a WR-LWA-0130 and tried them all with my Mini Circuits ZFSC-2-1, that while rated for 5~1000MHz operation has been tested and it works fine down to well below 100KHz. The nulls we less frequent but much deeper when they came. I then used a 2nd R2000 and fed each receiver with different antennas and just let the audio "mix" from the respective speaker outputs. The active dipoles gave the best overall effect. There was a very pronounced comb filter effect kind of like The Small Faces "Itchycoo Park" from 1967, or Gogi Grant's "The Westward Wind". Not too bad I think I will investigate some more this weekend. At this point a couple of active dipoles into a broadband "phaser" allow me to peak the signal and that works better the diveristy. Now what would happen if I had 2 sets of active dipoles feeding seperate phasers feeding seperate receivers? I can get at the AGC in my R2000 fairly easily and it should be fairly simple to build a comparator to pass the strongest signal to the audio chain. Just what I need another radio project. Terry |
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