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Have no prior experience, but; If you wish to provide physical measurements, could model the antenna in 4NEC2. Results could include: predicted gain vs frequency, azimuth/elevation patterns , and SWR. Some typical examples shown at TVfool forum. Since I cannot post a direct link: Use the...

OK, yes, it's a bit clearer now. You referred to that earlier, I didn't catch it then. Thanks.

Thanks for your response. Yes, and as you know, the antenna is what contributes positive gain, the other contributors are losses. True. Coaxial cable, matching, and filter losses are usually the main losses to such a system. At channel 3 frequencies, these losses can be fairly low...

Hi Trip, The equipment listed at RabbitEars for WWWB-LD, Clarkrange, TN seems a bit unusual: 1. Seems the same tower height (170' AGL) is to be transplanted to a higher ASL location. 2. The original (nondirectional) antenna is listed as 0.79 dB gain, however the replacement *directional*...