Topband: Do short beverages "work"?
zr at jeremy.mv.com
Mon Jan 24 13:26:56 PST 2011
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
----- Original Message -----
From: "Herb Schoenbohm" <herbs at vitelcom.net>
To: <topband at contesting.com>
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.
>> Bob VE7BS
> 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
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