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antenna theory - How do dual band J poles work? - Amateur Radio Stack Exchange
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Build and Review – Dual Band J-Pole 144/440Mhz – New River Valley Amateur Radio Club – N4NRV
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Build and Review – Dual Band J-Pole 144/440Mhz – New River Valley Amateur Radio Club – N4NRV
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The original Ed Fong Dual Band VHF/UHF 70cm/2m J-Pole PVC Pipe Antenna : Eye-On-Stuff - YouTube
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I've constructed a 144/440 Dual band Open Stub J-Pole Antenna. I saw the plans for this on the internet (link to plan… | Ham radio antenna, Ham radio, Radio antenna