+++++++++++++++++++++ See also Antennal Good Low Horizontal Loops +++++++++++++++++++++ Date: Fri, 5 Apr 2002 15:46:28 -0500 From: "ss lyon" To: , "Low Power Amateur Radio Discussion" Subject: [124036] Loops: BIGGER is better..... Steve... you're going to LOVE that loop. Bigger is definitely better, and ROUNDER is better. Maximize the enclosed area and enjoy the best that wiredom can offer! Check out W4RNl's web site, esp. the section on big loops. If you can, add the "A-Frame" 2X4 extensions one author suggested and get it as high as possible, too. I had 16' extensions on two poles, guyed similar to crane booms. Two 20' 2x4's, one lag bolted to each side of the pole with 4' overlap, and screwed together at the top. Assemble the A-frame on the ground, including pulley. Pull it up bottom first, bolting to the pole using the top bolts first, then swing it up into final position and put the bottom bolts in. (TWO people req'd). Very robust. 73 AA1MY Seabury & Sharon Lyon 99 Sparrowhawk Mtn Rd Bethel ME, 04217 U.S.A. 207-836-2576 -- orig note -- Date: Fri, 05 Apr 2002 13:28:22 -0500 From: Mercxx at aol.com To: qrp-l at lehigh.edu Subject: [124030] Loops and such Good afternoon, I am planning to setup a couple of loops one being the sloper noted in this month's QST. I am working with an acre and a half of land and have in place telephone poles (40') high in strategic locations. I was wondering is there such thing as too many wavelengths. The reason I ask this is because where the poles are located, I could in essence put up a loop that would cover about 1 acre, 40 feet up. Second question is anyone using beverage antennas for receive? I am thinking about using them in a couple of applications. Thanks for the time. 73 Steve N4TKP Bartow, Florida +++++++++++++++++ Date: Fri, 5 Apr 2002 16:52:27 -0800 From: "W2WU" To: , "Low Power Amateur Radio Discussion" Subject: [124043] Big Loops Great Loop de: W2WU author of "Random Loop Antenna". Two options an open loop (insulator at center) or closed. Results: Differerent Tuning, Bandwidth, & QUIET!! operation. 73, Ron ++++++++++++++++++ From: "Jerry Ford" To: Subject: Fw: [Elecraft] Antennas? Date: Tue, 30 Apr 2002 08:52:31 -0500 Sandy: I'm tuning an 80 meter loop with my K-1 and it works great. ( no balun ) I'm matching with a 1/4 wave of 75 ohm coax. Sandy wrote: > Anyone tried the loop antenna (small > loops, say 35-75 feet in circumfrence) > with the K1 and KAT1 combination with a 4:1 balun? > > Results on various bands compared to a random > antenna of 30-75' with a ground > counterpise lead. > > 73, > Sandy W5TVW +++++++++++++++++ Date: Mon, 16 Dec 2002 19:37:28 -0500 From: "rich a." To: elecraft at mailman.qth.net Reply-To: "rich a." Subject: [Elecraft] mojo at work I put up a "Loop Skywire" today ( http://www.arrl.org/members-only/tis/info/pdf/8511020.pdf ). Mine is sort of a narrow rectangle rather than a square loop....I don't have a long tape measure so the size is a very rough estimate.....approx 170' long by approx 50' wide (approx 440' total). One corner is up approx 35'....the nearest opposite corner is approx 20' up.....then it slopes down to approx 15-20 ft at the far ends. Its what fits with the trees I have on my property. The feed point is approx 45' from the corner on one of the long legs. I'm using rg8x, no balun. I didn't even try to "model" this but I just worked Boliva and Argentina (Tierra del Fuego) on 20m, both new countries for me, using my K2 with autotuner at 5 watts ssb, got 5x5 reports....so I'm doing the happy dance, as I had nothing to use on 20m before today. Mojo at work? I think yes!! :-) I'll be trying it on 80 and 160 tonite but may have to adjust the feed line length to get a better match....the way it is I only get 4.7-1 on 160, but it does 1.2-1 on 80. Rich K2CPE K2 #1102 +++++++++++++++++ Date: Mon, 16 Dec 2002 19:10:56 -0800 From: Jack Brindle To: elecraft at mailman.qth.net Subject: [Elecraft] Re: Elecraft digest, Vol 1 #374 - 54 msgs On Monday, December 16, 2002, at 19:37:28 PST, "rich a." wrote: > I put up a "Loop Skywire" today ( > http://www.arrl.org/members-only/tis/info/pdf/8511020.pdf ). Mine is > sort of a narrow rectangle rather than a square loop....I don't have a -- snip -- Now remove the coax and feed it with twinlead or open-wire feed. Bring the twinlead into the shack, and use a Balun _AT_ the K2/KAT2. You should be able to tune the antenna up on any frequency and have it work quite well. The feedline won't radiate (as the coax certainly does now) and you will be very happy. I'm running a 260-foot horizontal triangular loop antenna (because that's about all my city lot will let me do) with very good success. It is fed with 1" open-wire feed, and a homebrew "swinging-link" antenna tuner. Someday soon (when I get other projects out of the way) I'll figure out how to automate that sucker... -Jack Brindle, WA4FIB ======================================================================= MacDobs - helping to shift the paradigm for low-cost amateur astronomy. ++++++++++++++++++