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Total 17 documents matching your query.

1. Topband: Length of Beverages (score: 1): Author: Cqtestk4xs--- via Topband <topband@contesting.com>; Date: Sat, 26 Jul 2014 10:31:41 -0400 (EDT); I'm planning on putting up some Beverages for the fall season...primarily for use on 160. Unfortunately, they have to be taken down again in the Spring for crops. The good news is they can be any len; /archives//html/Topband/2014-07/msg00045.html (7,270 bytes)
2. Re: Topband: Length of Beverages (score: 1): Author: Larry <larry@w7iuv.com>; Date: Sat, 26 Jul 2014 07:43:33 -0700; I'm sure it varies a lot from QTH to QTH, but here, over mostly volcanic ash and sand, I could see significant difference between 800 foot and 1100 foot. I never got around to trying longer than 1100; /archives//html/Topband/2014-07/msg00046.html (7,919 bytes)
3. Re: Topband: Length of Beverages (score: 1): Author: donovanf@starpower.net; Date: Sat, 26 Jul 2014 11:39:13 -0400 (EDT); Hi Bill, Longer Beverages provide narrower beamwidth, which reduces QRM or QRN that would be received through the main lobe of a shorter Beverage. (just like adding elements to a Yagi narrows its bea; /archives//html/Topband/2014-07/msg00047.html (8,157 bytes)
4. Re: Topband: Length of Beverages (score: 1): Author: donovanf@starpower.net; Date: Sat, 26 Jul 2014 12:23:31 -0400 (EDT); Hi Bill, I forgot to mention that my 8-circle vertical receiving arrays are specifically built for installation and removal in a single day They're installed on a nearby farm that I have access to on; /archives//html/Topband/2014-07/msg00048.html (8,266 bytes)
5. Re: Topband: Length of Beverages (score: 1): Author: Mike Waters <mikewate@gmail.com>; Date: Sat, 26 Jul 2014 16:32:56 -0500; On my bucket list is a system for remotely changing the lengths of my two 2-wire Beverages between 580 and ~800 feet long. A very effective technique for improving the front-to-back performance of Th; /archives//html/Topband/2014-07/msg00049.html (8,434 bytes)
6. Re: Topband: Length of Beverages (score: 1): Author: "Richard (Rick) Karlquist" <richard@karlquist.com>; Date: Sat, 26 Jul 2014 20:13:39 -0700; On my bucket list is a system for remotely changing the lengths of my two 2-wire Beverages between 580 and ~800 feet long. I actually tried this and discovered that any wire beyond 400 feet made no; /archives//html/Topband/2014-07/msg00050.html (7,822 bytes)
7. Re: Topband: Length of Beverages (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Sun, 27 Jul 2014 09:05:00 -0400; At a prior home I had a couple of 1200-1500' that heard quite well to the NE and SE on the real long haul DX. When I extended the 1200 to 2200' it became a real dog. Here Ive been content with 500-75; /archives//html/Topband/2014-07/msg00051.html (10,263 bytes)
8. Re: Topband: Length of Beverages (score: 1): Author: Mike Waters <mikewate@gmail.com>; Date: Sun, 27 Jul 2014 08:44:21 -0500; If I every put up a Slinky-style Beverage, I'm probably going to try #12 TW solid insulated copper wire. Probably will close-wind it on a ~4" diameter fixture made from PVC pipe, and then stretch it; /archives//html/Topband/2014-07/msg00053.html (8,516 bytes)
9. Re: Topband: length of Beverages (score: 1): Author: Don Johnson <n4dj@me.com>; Date: Sun, 27 Jul 2014 12:30:39 -0400; The best thing I ever did for Topband receiving was to lay out a 220 foot wire on the ground pointed NE to Europe. I then put one down for 480 feet due West. Switching from one to the other was drama; /archives//html/Topband/2014-07/msg00056.html (8,383 bytes)
10. Re: Topband: Length of Beverages (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Sun, 27 Jul 2014 19:53:05 -0400; 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 (-: Using your idea I wonder if a pair could be wound bifilar and u; /archives//html/Topband/2014-07/msg00059.html (9,671 bytes)
11. Re: Topband: Length of Beverages (score: 1): Author: Yuri Blanarovich <k3bu@optimum.net>; Date: Sun, 27 Jul 2014 08:43:39 -0400 (EDT); 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 bea; /archives//html/Topband/2014-07/msg00061.html (10,455 bytes)
12. Re: Topband: Length of Beverages (score: 1): Author: Yuri Blanarovich <k3bu@optimum.net>; Date: Sun, 27 Jul 2014 10:26:45 -0400 (EDT); 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 be; /archives//html/Topband/2014-07/msg00062.html (10,641 bytes)
13. Re: Topband: Length of Beverages (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Mon, 28 Jul 2014 11:49:34 -0400; 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 intere; /archives//html/Topband/2014-07/msg00063.html (11,443 bytes)
14. Re: Topband: Length of Beverages (score: 1): Author: Mike Waters <mikewate@gmail.com>; Date: Mon, 28 Jul 2014 10:59:32 -0500; Carl, Ok. I think the thing to do is just experiment with the length/pitch. Stretch it out along the rope, past the point where it fires backwards (and then some), maybe. Using your idea I wonder if; /archives//html/Topband/2014-07/msg00064.html (9,832 bytes)
15. Re: Topband: Length of Beverages (score: 1): Author: Mike Waters <mikewate@gmail.com>; Date: Mon, 28 Jul 2014 11:42:53 -0500; 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_be; /archives//html/Topband/2014-07/msg00065.html (9,889 bytes)
16. Re: Topband: Length of Beverages (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Mon, 28 Jul 2014 13:54:08 -0400; 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 revers; /archives//html/Topband/2014-07/msg00066.html (12,995 bytes)
17. Re: Topband: Length of Beverages (score: 1): Author: Guy Olinger K2AV <k2av.guy@gmail.com>; Date: Mon, 28 Jul 2014 19:36:43 -0400; 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 b; /archives//html/Topband/2014-07/msg00068.html (14,313 bytes)

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