Topband: Beverage measurements

Jon Zaimes AA1K jon.zaimes at dol.net
Tue Sep 16 12:23:24 EDT 2003


Hi Bill,

The stagger-phased Beverages are a big advantage here. I can hear things on my European pair that are inaudible on a single wire in the same direction (pair are 513-feet long; single about the same).

A stagger pair at 324 degrees, each 465-feet long, seem to do about as well as the single-wire 880-foot wire in same direction.

New parallel phased pair due West -- 525 feet each, spaced 312 feet -- is also a big improvement over single wire.

A parallel pair of 950-foot wires toward JA, spaced 175 feet, offered some improvement over a single 500-foot wire in the same direction, in the few tests I was able to make on it last season. But I will probably be converting it to a stagger-phased pair soon.

The stagger pair of course doesn't narrow the beamwidth, just improve the f/b, with a deeper null to the rear of the rearward element (with the leading current). The broadside (parallel) pair spaced 300+ feet gives a narrower lobe and improved f/b. Either one could be an advantage, depending on your target area and orientation of the nulls.

Next step here is to add a second stagger phased pair toward Europe, spaced 400 feet away, and feed the two pairs together for additional improvement.

73/Jon AA1K

My new At 09:48 PM 9/15/03, you wrote:
>Hi John!
>
>K9DX wrote:
>>7. If you want better signal to noise, reduce the beam-width. Going from 15 to 30db off the sides or back, won't do much.
>
>        Do you feel this applies to staggered/phased Beverages
>(i.e.echelon)?  My greatest noise problem is often thunderstorms
>from the South-Central US when trying to listen toward Europe.
>I've been considering staggered/phased Beverages as a solution
>and believe this should help greatly.  Even if individual Beverage
>F/R patterns are not great, the result of a phased/staggered pair
>should work fairly well IMHO.  Any thoughts on this?
>
>                                        73,  Bill  W4ZV
>
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