![]() ![]() ![]() I wasn't expecting the range of frequencies the loop can receive to be perfect or anything nor to have an SWR below 2.0 for everything but 11:1? and an impedance well below 50 and well above 50? When the Loop's best SWR measurement of 3.54:1 at 22 MHz and an impedance of 14 ohms and its worst SWR of 11:1 at 18.47 MHz and impedance of 710 ohms, being fed through a 50 ohm cable makes me wonder how it can receive anything at all. Anything above 2.0 I would think the antenna was stepping into "bad matching" territory, maybe I'm being overly conservative, I'm not sure. I am not an expert with all of this but I consider an SWR of 2.0 or less to be "good" and 1.5 or less to be "very good". I have been using my loop for about a year now and in my limited "year" experience with receiving SW with the loop I thought it had been doing well. The SWR and Impedance was bad to terrible on all frequencies and some parts it was horrendous (see the attached screenshot). ![]() The surprise came when I hooked up my Wellbrook loop antenna and did a sweep from 0.1 MHz to 30 MHz. As I expected, my Diamond discone and Siro UHF discone do better on some frequency ranges and a little worse on others. I have never used one before so I have been playing with mine for the last hour or so, just seeing what I am getting as far as SWR and Impedance goes on my three SDR/scanner antennas. I finally got one of those NanoVNA's people have been talking about. ![]()
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