Thank you, Frank....hearing similar analysis here so it's sounding like the NORD style of antenna isn't for me. Appreciate the "advice."
72 de Jim nR. K9JWV ________________________________ From: donov...@starpower.net <donov...@starpower.net> Sent: Tuesday, February 2, 2016 11:14 PM To: Top Band Contesting Cc: James Rodenkirch Subject: Re: Topband: NORD antenna for top band..... Hi Jim, The NORD antenna is a relatively inexpensive low frequency antenna (typically used at 50-100 kHz) where its impossible to achieve vertically polarized antennas with close to 1/4 wavelength vertical height. The NORD antenna typically consists of an electrically short folded unipole (typically less than 0.05 wavelength tall) with at three (or more) umbrella wires attached to the top of the vertical spaced evenly spaced at 120 degree intervals Unlike umbrella antennas used on topband (such as in my W8JI/W5ZN 8-circle receiving arrays), the NORD antenna also uses a capacitor at the end of each umbrella wire. The three capacitors are used to tune the antenna, avoiding the need for a lossy loading coil at the feedpoint of the antenna, The NORD antenna is a poor choice for Topband where many of us can use much more efficient quarter wavelength inverted-L antennas or in some cases full size quarter wavelength verticals. To learn about the NORD antenna simply Google: "NORD Antenna" 73 Frank W3LPL ________________________________ From: "James Rodenkirch" <rodenkirch_...@msn.com> To: "Top Band Contesting" <topband@contesting.com> Sent: Tuesday, February 2, 2016 4:12:27 PM Subject: Topband: NORD antenna for top band..... .....anyone experimented with a NORD-configured vertical antenna? I have the Navy antenna publication - http://www.hamuniverse.com/US%20NAVY%20Antennas%20and%20Wave%20Propagation.pdf - but, other than a brief description, not much to go by....any assistance, e.g., steerage to a web site or empirical data/analysis results appreciated. Antennas and Wave Propagation - HAM RADIO<http://www.hamuniverse.com/US%20NAVY%20Antennas%20and%20Wave%20Propagation.pdf> www.hamuniverse.com NONRESIDENT TRAINING COURSE . Antennas and Wave Propagation. DISTRIBUTION STATEMENT A: Approved for public release; distribution is unlimited. 72 de Jim Rodenkirch K9JWV _________________ Topband Reflector Archives - http://www.contesting.com/_topband _________________ Topband Reflector Archives - http://www.contesting.com/_topband
