Online chatter about what rigs were used at WRTC and why got me to
pursuing something that's been bugging me for a long time -- the band
pollution produced by many of today's transmitters. K6XX tackled it in
talk to NCCC last fall, and over the weekend, when IOTA was slow (which
was a lot of th
Back in 1986, I wrote an article for HAM RADIO MAGAZINE entitled, Multi-
length Beverages. John Devoldre, ON4UN copied the article in his first " Low
Band DXing " book. Willy K3VW
In a message dated 7/27/2014 12:01:38 P.M. Eastern Daylight Time,
topband-requ...@contesting.com writes:
Sen
In my experience, a 50% VF is associated with a wire lying on the
ground and is in the lower end of measured VF's for wires laying on
the ground. 45% is the lowest I have seen personally. A regular
beverage up six to eight feet above ground will usually be 95% or
better.
A BOG cut to certain leng
I'm sad to here the passing of Bob Eldridge VE7BS. Bob and I traded
notes and had many technical discussions in the 70's much like Stew
Perry and we met many times at Northwestern DX club meetings. He visited
my Ham Shack in the early 80's when living in Seattle. We'll miss you
signature on th
There is really nothing new to explain. It has been established since the
mid 1920's that the Beverage is a slow wave antenna, ie: it has a velocity
factor, and at an electrical 50% VF it will reverse direction.
It doesnt take much effort or math to compute the electrical length
shortening of
Hi Jim,
As we move the turns closer, we increase the velocity factor too much. At
some point, the Slinky will receive off the opposite (feed) end. Tom
explains it at
www.w8ji.com/slinky_and_loaded_beverages.htm .
And I just found this, where K5UO seems to say that his Slinky was about 12
turns pe
Carl,
On Sun, Jul 27, 2014 at 6:53 PM, Carl wrote:
> I knew that answer 20 years ago Mike. Perhaps someone has a large Slinky,
> can count the turns and then give it back to his grandson (-:
>
Ok. I think the thing to do is just experiment with the length/pitch.
Stretch it out along the rope, p
Thats where a simple active homebrew combiner could be helpful instead of
wasting $600 on a fancy box. When they get down to $200 or someone else
duplicates the performance at that price Id be interested.
Carl
KM1H
- Original Message -
From: "Yuri Blanarovich"
To: "Richard (Rick) Ka
It makes difference on "regular" ground.
Once I put up "killer" 1200 ft Beverages on a location on the top of the
hill, with slightly sloping ground around. First night in the contest
Inv Vee was beating them. Sloping terrain and long wires were likely
producing low angles, way too low for prop
It makes difference on "regular" ground.
Once I put up "killer" 1200 ft Beverages on a location on the top of
the hill, with slightly sloping ground around. First night in the
contest Inv Vee was beating them. Sloping terrain and long wires were
likely producing low angles, way too low for pr
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