The common slogan in topband is that you can't have too many antennas. My new slogan at age 90 is that you can have too many (time for repairs, maintenance, observing which rx antenna is best, etc) - my wife age 94 agrees. This could be a long story. To start I listed the RDF of good or existing rx antennas here. Then I had to review my goals - the main one is new countries on 160, which might occur in a very few directions. I do ragchew on other bands or help others who need MT. How to sort all this out? One, don't start new complex projects. Next how to evaluate what I have? Possible problems - rx antennas in tx antenna field, . Brute force approach, do on the air comparisions with tx verticals shorted to ground or open feedpoint (which is better) - is it a pattern distortion problem or tx antenna reradiated noise problem (or does the test give the overall answer - how big a problem is it?) Or how good are the feedlines for equal phase delay in arrays? Should be easy to determine with some MFJ dip measurements. I could go on and on with a bunch of other factors or issues or variables. One question is what is the RDF for a EWE broadside array (that I have in the tx antenna field). See page 33 QST Feb 1995 by WA2WVL, figure 9, which represents the array that I have, with 150' spacing. The beamwidth is 45 degrees which is pretty good. What though is the RDF? My computer skills have faded out. This is the only RDF number that I don't have. Thanks for listening. 73 Bob W7LR in MT [email protected]_ (mailto:[email protected]) _______________________________________________ UR RST IS ... ... ..9 QSB QSB - hw? BK
