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Re: In search of infos on HF horizontal loop antenas
Gilles, HF horizontal loops are usually fairly large antennas. Typically cut to 1005/f(MHz) for circumference in feet. They are often fed with open wire transmission line using balanced antenna
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qrpbear
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#55
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Re: Pizza box loop
well tried an experiment tonight took the yaesu frg-7700 and look outside and the pizza box loop and from what I see the loop is more directional closer to ground and seems to work better on some
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Scott Savage KC7WDG <kc7wdg@...>
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#54
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In search of infos on HF horizontal loop antenas
Hello ! Question in the title... Can anybody give me some info about these antenas ? 73's Gilles FM5AD
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Gilles
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#53
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Another One For Ya'
Following up on a post in the VLF group this morning I visited Renato's VLF site at... <http://www.vlf.it> where he posted details of a new antenna he is using for VLF/ELF reception.
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qrpbear
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#52
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More Compact Antennas
Here is another link to a site dealing with compact antennas including the coffee can antenna, cone disk, bicone and eh antennas. There are a number of useful Javascript calculators here as well.
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qrpbear
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#51
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The Biplane Antenna
Gents, Here's the link to a compact antenna that I think deserves more in the way of exploration and exploitation. <http://www.antennex.com/hws/ws0601/morebp.html> There's a bunch of other stuff in
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qrpbear
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#50
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Re: Mass market loop antennas
Steve, DDRR stands for Directional Discontinuity Ring Radiator. I thought about building one for 30 meters (and still may) but rejected it at the time since horizontal space is more of a premium item
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qrpbear
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#49
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Re: Book recommendation
<science@w...> wrote: Welcome! I found a free online book on antennas, still being written. From Rutger's University, called Electromagnetic Waves and Antennas.
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Steven Greenfield AE7HD
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#48
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Re: Mass market loop antennas
<science@w...> wrote: My brain won't stop buzzing. It's hard to wind down and sleep at night. When I was young and my body could take it, I might stay up for a couple of days or 3 days (rarely!) in a
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Steven Greenfield AE7HD
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#47
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Re: More strangeness
Let's just let this drop, and talk about loops. Steve
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Steven Greenfield AE7HD
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#46
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Re: Mass market loop antennas
Man, where do you find the time? I mean, HAM, propmaking, electronics, weird antennas, mad scientisting, moderating... I need a tutorial from you! -Brian Wesley Rich http://www.west.net/~science/
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Brian Wesley Rich <science@...>
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#44
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Re: More strangeness
I read that as "get you back in, enough said." -Brian
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Brian Wesley Rich <science@...>
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#43
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Book recommendation
Just received the invitation to join this list. Pleasure to be here; thankyouverymuch. One of the loop antennas I have built was about 4 feet on a side, about 4 turns; built for listening to
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Brian Wesley Rich <science@...>
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#45
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Re: Theory v. Practice
Barry, Yah... there doesn't seem to be a whole lot of "middle ground" in loop theory. I had some calculus in high school 40 some odd years ago but don't remember how to do any of it now. Simple
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qrpbear
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#42
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Re: Mass market loop antennas
Steve, Gotta agree with you on this one. I get people coming in to the store almost every week wanting to know how they can get better reception of AM stations on their radio. It's the same ol' thing
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qrpbear
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#41
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Mass market loop antennas
What most people want is just to buy a radio and have it pick up the station they want. It's only tyros like us who will go to the trouble of owning a radio -and- an add-on antenna. Had a gentleman
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Steven Greenfield AE7HD
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#40
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Re: More strangeness
I looked up his profile and stumbled onto his web site. He is 26 years old, and seems to be a normal guy. I think he wants to develop intellectual property regarding loop design, and possible go into
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Bruce Carter
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#39
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Re: Pizza box loop
Or better yet get a clean one from the pizza restaurant so it doesn't STINK or attract ants.
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Bruce Carter
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#38
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Theory v. Practice
Hello All: Over the last couple of years I have done extensive searching for both theory and practice with regard to loop antennas, and here is what I have found: 1. Most of the theory is way over my
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Barry Savage <sofistic@...>
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#37
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Re: Pizza box loop
I just left it inside... after a week or so it gets nice and stiff. Makes for good re-inforcement of the box. 73, 'Bear' NH7SR <alienrelics@y...> wrote:
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qrpbear
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#36
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