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I think Doc may have alluded. I haven't seen him allure nor would I be interested.


Your thumbnails show 2 antenna which differ only in feed design. If there is more going on than that your drawing is incorrect and incomplete. How can someone discuss something that isn't represented correctly?


I suggest you check out the many fine articles on antenna test ranges. Most of the better ones are IEEE publications. Antenna testing isn't as simple as it first appears.


As for repeaters changing strength: path loss is in constant change this time of year. Check out the APRS tropo maps. Valid experiments seek one variable at a time.


Have you applied some of that test equipment to see just what a delta of 3 to 5 bars really means?