Author: Dan Maguire via Topband <topband@contesting.com>
Date: Tue, 5 Aug 2014 17:39:29 -0700
The latest AutoEZ update includes the ability to create EZNEC models having 2 separate ground media. One typical use is to model a vertical located on a sandy beach next to salt water. Using AutoEZ y
Just to note that the low-angle radiation produced by monopoles is not accurately shown by a NEC model/study that does not include the surface wave, regardless of whether one or two ground-plane medi
Just to mention that the prior opinion is controversial and not universally agreed upon. Nor to date has anyone surfaced with actual measurements made at the distances (25 to 50 km) and with span of
Not exactly as described in the quote above, but below is a link comparing the real-world groundwave fields measured by a consulting engineer using a calibrated field intensity meter (bottom of that
Just an observation to all: When Tom, N6BT went to Jaimaca and operated 6Y2J (I think was the call) with verticals on the beach I was blown away. I heard them 2 hours before Sunset here on 160....nuf
How was his signal compared to someone from a similar heading and distance at the same time who was not on the beach? -- Original Message -- From: "Hardy Landskov" <n7rt@cox.net> To: "Guy Olinger K2A
Tom, I was totallly not expecting any station from that direction, just thought I'd work a few locals with high incident angles before Sunset here. Then I heard the 6Y2 guys and it was amazing. He wa
There is some published research in this area, mostly from the BBC using MW stations as the signal source. I'd start with BBC report 1968-45, now available online. Chuck _________________ Topband Ref
My point is if no one else is on, we really don't how other signals would be. It's like a drag race with just one car, or a pony show with one horse. Tom, I was totallly not expecting any station fro
The riveting experience I draw on is one particular IOTA contest where our group was operating as N4A on Core Banks, NC. The bands were full of signals in the early afternoon, including stuff on 40 f
Author: "Mike & Coreen Smith VE9AA" <ve9aa@nbnet.nb.ca>
Date: Mon, 11 Aug 2014 20:10:45 -0300
I can only provide anecdotal evidence. In July 1997 we did CY9AA and our 160m antenna turned out to be a 130' wire, suspended by a large helium/mylar balloon. We mounted the base in the rocks right a
One pony needs to get into one drag radio car and drive around the ocean front, over the bridges, back over the land and watch the S-meter and listen to the bands. Observant would see 10 - 20 dB diff
There have been reports of verticals and salt water almost as long as there has been radio. It helps horizontal antennas also. Ive operated for enough years aboard USN ships to know it is often a ban
Yuri, Thanks for your input. Tom asks, where are the other stations? It is a one pony race. Well I am sure if we look at the CQ logs for that year we will see that there were other Carib stations on
Author: Cqtestk4xs--- via Topband <topband@contesting.com>
Date: Tue, 12 Aug 2014 06:14:26 -0400 (EDT)
One last thought on this...... When I came back to the mainland in 2010 the only rig I had was my truck, an ICOM 706 and a Tarheel screwdriver antenna....not exactly a super setup. I was really cravi
Hi Guys I would say vertical "IN" the salt water. George AA7JV is my mentor about antennas, and his 160m vertical is at the pear, just 2 m from the salt water, the ground plane is a flat sheet SS met
Just to set the record straight, I have no doubt saltwater helps propagation at most angles. I probably did not make my point very well. My point is, with no comparison, an "impression" or "feeling"
By the way, my intention is not to make anyone feel bad, but to just to remind people that an impression or feeling is not confirmation. Impressions really get us off track, and lead to unnecessary d
Oh, here comes the "guru" again. :-) Unnecessary debate? We are talking about experiences and RESULTS of comparing normal in land "ground" effect vs. salt water beach or marshes. We are commenting on
Wow, nice S-meter... Oh, here comes the "guru" again. :-) Unnecessary debate? We are talking about experiences and RESULTS of comparing normal in land "ground" effect vs. salt water beach or marshes.