I don't recognize that one, Niel, but keep in mind that many antennas used by the Military and Emergency Comm centers are *very* inefficient. The requirement is usually for broader bandwidths and simple designs over "gain" or efficiency.
For example, the famous B&W broadband broadband folded dipole (http://www.bwantennas.com/ama/fdipole.ama.htm ) has been criticized by countless hams for throwing away at least half (3 dB) of the applied RF, but high efficiency was never its goal. That antenna provides a decent match across a wide frequency range, usually covering several Ham bands, in exchange for putting twice as much RF into it as you'd need for the same signal on a narrow-bandwidth conventional antenna. Neither emergency services or the military have any need or interest in working DX or busting a pileup. They are interested in simple, easy-to-use antennas for ranges from a few dozen to a couple hundred miles, maximum. 73, Ron AC7AC -----Original Message----- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Niel Skousen Sent: Sunday, June 17, 2012 8:26 PM To: Elecraft Reflector; qr...@mailman.qth.net Subject: [Elecraft] Antenna Question I'm pretty sure I've seen this antenna on the net, but don't recall the name nor have I been able to find a link to a description / design data. The county ERC has a 'shortened fan dipole' with three parallel elements, spaced about 18-24" apart on each side. the longest element folds back around the mid-length element toward the shortest element. The antenna end insulator / guy rope is attached to the long element, where it folds back. There appears (from the ground) to be a 6~8" insulator / gap between the end of the shortest element, and the longest element where its been folded back. no traps, loading coils, or loading resistors that I can see. I'm assuming three or four band coverage (80, 40, 20, and 15 ??) with a 75m dipole, a 40m dipole (with 15m as a freebie), and a 20 m dipole. but would be interested in more technical details if anyone can decipher my text description above. Thanks Niel ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
