Mostly by dumb luck I've managed to build a SW loop that seems to work well.? It's made of 1/2" OD copper tubing, about 34" across, with a 10" x 7 1/2" coupling loop made from 8 AWG copper wire about 1/16" (the thickness of a ty-wrap) from the main loop.? The coupling loop is connected to a dual banana female socket with banana connectors.? On the other end a 15' length of RG-58 goes from the BNC to the back of my radio.? The antenna has prominent nulls and is very directional.? Combining that with an old 3-section variable capacitor allows me to tune from ~4500 kHz to ~18000 kHz.
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The only reason I went into the above is that I'm always looking for suggestions to make it even better.? If anyone sees anything I'm missing here I'd certainly appreciate hearing about it... thanks!
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Earl