My Simple Balcony Antenna
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Helical Dipole for 40m - Resource Detail - The DXZone.com
A two dollar helical hf portable antenna - Resource Detail - The DXZone.com
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ISM 433MHz Helical Antenna › AN-SOF Antenna Simulation Software
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ElectricBrain | NVIS Helical Dipole Antenna
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Antennas for HF mobile operation - IW5EDI Simone - Ham-Radio
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HF Helical Antennas: Theory and Practice
