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
>
>_______________________________________________
>Topband mailing list
>Topband@contesting.com
>http://lists.contesting.com/mailman/listinfo/topband
_______________________________________________
Topband mailing list
Topband@contesting.com
http://lists.contesting.com/mailman/listinfo/topband
|