Friday, July 15, 2016

Simple Ham Radio Antennas--Doublet aerial for HF amateur ham radio short wave bands

If you're having difficulty viewing this video, please insert this title link into your browser search box: Another great, easy-to-understanding antenna tutorial from Ray (G4NSJ). In this laid back and thoroughly engaging conversation, Ray explains the theory, design, and operation of the doublet antenna, one of my favorite multi-band antennas. Cut the antenna for the lowest band of use, feed the antenna with 300 ohm television twin lead, 450 ohm ladder line, or 600 ohm balanced line, and connect the feedline to your antenna transmatch (i.e. "tuner") with a 4:1 current balun. Run a short length of 50 ohm coaxial cable to your HF transceiver, and you're ready to explore a multitude of bands with just one antenna.  My doublet is designed for the 40 meter band and is configured as an inverted vee.  With a 450 ohm ladder line feeder, a 4:1 current balun, and my trusty Drake MN-4 "tuner", I can work the 40, 20, 15, and 10 meter amateur radio bands without any problems.

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Aloha es 73 de Russ (KH6JRM).

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Aloha es 73 de Russ (KH6JRM).