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Wayne wrote:
Looks like I'll have to use a horizontal loop in the attic for a few months. Any opinions on how to best feed it? --open wire --coax coil balun --ferrite bead balun --straight coax The loop is about 13 feet per side, and I want to operate 20 meters and up. In the past I have simply used a coax feed without a balun. It worked OK, but there was a lot of stray RF around the house. TIA SWR loss is less of a headache with open/ladder line feed. My principal DX antenna is an 8jk end-fire array cut for 20 meters. I've fitted it in the attic of all the homes I owned, fed it with ladder-line, and worked it with a "classic" balanced tuner on 30 through 10 meters. Yes, RF does get into the wiring (especially triggering slightly opened lamp dimmers), even with good grounding. The array is a gain antenna, and has given me very good results over the past 35 years I've operated with this antenna. W9NPI |
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