Much of the discussion on NVIS term origin has been handled before on the NVIS reflector. The British were using NVIS in Malaya during the Emergency there, from the post world war II time to 1963 and
QEX magazine only started in 1981 per the QEX pages on www.arrl.org. The index cited may have referred to issue number, not year, since it is published several times each year. Stuart Rohre K5KVH ___
Hi all, The technology has been around at least since WW2, but the question is: who first used the term NVIS to describe it, and when. Other than the fact that QEX began publishing in 1981 (I was a s
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Mon, 03 Jan 2011 16:41:42 -0600
That index was for all issues of the year 2007 and referred to each article by issue, like Jan/Feb then PAGE number. It was coming out 6 times a year then, like now. 73, Jerry, K0CQ _________________
I always though of short haul skip or NVIS as a phenomena rather than a technology. Yes, you can intentionally build antennas to favor high angle radiation, and when you do that you could call it "N
Ken, I guess it's a matter of semantics. If something "just happens," it's a phenomenon. If you design the system to produce that effect, it's a technology -- to me, anyway. By this definition, the p
OK - just so there are no disputes in 100 years about where the term originated and by whom ........ I'm going to re-design my antenna system to provide strong signals at the low take-off angles need
Many years ago, a friend gave me a Heath HW-7 QRP rig. I managed to put up a 40 meter dipole on the roof of my 3 story apartment building lying directly on the shingles. I managed to work Chicago, wh
Steve, Did you invent that term today, or did you think of it yesterday? I want to get this right in my notes Dave WA3F OK - just so there are no disputes in 100 years about where the term originated
If I beat you to the patent office.... you will be paying me to use it ! == JHR == . I'm going to call it a "Near _______________________________________________ TenTec mailing list TenTec@contesting
OK - for the benefit of history, and so that my obituary is accurate, it was invented at 2130hrs GMT on 4th January 2011 in the small UK village of Milton Malsor ;) 73, Steve G3TXQ __________________
Nah Steve, choose a better name. That one sounds too much like the "Not Invented Here Syndrome". (NIHS) :-) OK - just so there are no disputes in 100 years about where the term originated and by whom
Ken, The number of radials won't really affect the angle of radiation. With a poor ground, you will still have a low take-off angle; you'll just had a heck of a lot of ground losses. 73 Rick I always
First art wins the battle. Mail yourself a copy of the idea and host the postoffice doesn;t loose it. _______________________________________________ TenTec mailing list TenTec@contesting.com http://
Nuts... I will have you kept in the village pound, while I file my patent documents ! == James -K8JHR == _______________________________________________ TenTec mailing list TenTec@contesting.com http
Hi Rick, I'll have to review this, maybe I am suffering from a false memory, or an accurate memory of false information. I thought that a poor counterpoise under a vertical reduced the overall effici
Let's drink on it... would you prefer the Greyhound or the Compass ? == JHR == == _______________________________________________ TenTec mailing list TenTec@contesting.com http://lists.contesting.com
The Compass is nearer - about 100 yards; if we made it the Greyhound I'd have to stagger 150 yards to get home ;) 73, Steve G3TXQ _______________________________________________ TenTec mailing list T
Ken, I don't know if the low angle efficiency falls off faster than the high angle radiation. I can't remember ever reading that, but I have probably only read "a drop in the bucket" of all there is.
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Wed, 05 Jan 2011 10:00:15 -0600
Because of extended ground losses, no antenna has strong radiation exactly at the horizon. It can try but that RF gets absorbed. Good efficiency on 40 and higher bands, but rotten on 160 where a good