I show better than modeled or book directivity as low as the 175KHz area EU/AF LF BCB with my 750-900' versions. For NDB's its often like pointing a flashlight. On the MF BCB its always amazing what can be found with an 8 position switch.
Carl KM1H ----- Original Message ----- From: "Herb Schoenbohm" <[email protected]> To: <[email protected]> Sent: Monday, January 24, 2011 5:40 AM Subject: Re: Topband: Do short beverages "work"? > On 1/23/2011 8:45 PM, Bob Eldridge wrote: >> Hi Rick >> It depends what you mean by "really short". Some consider a half wave >> to be really short. Beverage Rice and Kellogg original AIEE paper >> showed that there is not much difference in the pattern of a half wave >> and a full wave, but considerable difference when you go to 2 wave. >> They considered the half wave to be working as a Wave antenna, and for >> sure the ones I have used (6 ft or so above ground) had useful >> directivity on 160. >> 73 >> Bob VE7BS > Bob, > > > I always test my Beverages on AM Stations at 1000KHZ to 1400Khz which > is about 1/2 wave for a 500 or 600 footer....these tests remove all > doubts that a "short" Beverage is a superb antenna. Stations off the > back for example are covered by Stations in PR and Rep Dom on the > front....but switching to the SW, S, and SSW Beverages the PR and Rep > Dom stations disappear and out pops a religious stations in the > Grenadines without any sign of the others. This is an easy test to > remove a lot of doubt on pattern performance. > > > Herb, KV4FZ > _______________________________________________ > UR RST IS ... ... ..9 QSB QSB - hw? BK _______________________________________________ UR RST IS ... ... ..9 QSB QSB - hw? BK
