![]() |
I couldn't agree more! The 1/4" nylon rope is the way to go, and the longwire
doesn't have to be tight as a banjo string, to work well. Bring a butane lighter up on the roof with you, so you can melt the loose ends to keep them from fraying. I finish the knot work by securing the loose ends to the main rope with some small black UV resistant cable ties. It neatens it up, and you won't have to worry about it for years. Good DXing to you, Gary, Illinois,USA. |
Excellent idea..
Test different weight / Rope length combinations.. Sounds like fun !! - ALSO.. have extra weights on the ground tethered to the weight / pully hookup for very violent gusts.. - Don't know how it would fare in Ice Storms.. Bungees don't seem to weather well, but will do for the short term. You may also consider, instead of directly tying it off at the far end, running the rope through a pulley, with two or three bricks (or some other suitable weight) to hold tension on the rope. I found a 4" pulley for about $5 at the local home-improvement store that's sold as a laundry-line pulley. Even though it's plastic (with a metal axle), it's tougher than it looks. -=jd=- -- My Current Disposable Email: (Remove YOUR HAT to reply directly) |
"-=jd=-" wrote in message ... On Tue 04 Jan 2005 10:39:58a, "Michael Lawson" mtl@[REMOVE-TO-REPLY] fuse.net wrote in message : "-=jd=-" wrote in message . .. On Fri 31 Dec 2004 05:29:07p, "RHF" wrote in message oups.com: ML, . You can get fancier with a Three to Five Pound (3#-5#) Fish Weight or an Old Wooden Window Weight instead of a Brick. . Buy a Ten Foot (10') Piece of PVC Pipe that the Weight will just {Fit} "Slide" Up-and-Down in Freely. . Stick the PVC Pipe in the Ground about Two Feet (2') with the rest of the Pipe above Ground. . Tie-Off the Weight with the Rope so that it is 'positioned' Midway {Centered} in the PVC Pipe to Move with the Dynamic Loading of the Antenna Wire. . Insert the Weight into the PVC Pipe. . Paint the PVC Pipe if that is what will make the Family Happy ;-} (o: Out-of-Sight - Out-of-Mind :o) . . iane ~ RHF . All are WELCOME at the Shortwave Listener (SWL) "Antenna Ashram" http://groups.yahoo.com/group/Shortw...tenna/message/ 502 Some Say: On A Clear Day You Can See Forever. I BELIEVE: On A Clear Night . . . You Can Hear Forever and Beyond, The BEYOND ! [ With the an Shortwave Listener "SWL" Antenna of your own making. ] . . I was going to suggest a bucket filled with the necessary amount of sand - but being at a childrens swing-set, I can imagine that wouldn't last very long at all... Ha. Not with my kids. I was originally going to hang one end off the top of their playset (it would have given me an extra 20 feet of length), but then I thought that my son would try to see if he could hang from the wire. Therefore, I decided to attach a pressure treated 2x4x8 piece vertically on the rear of the playset (4 feet attached to the 4x4 support and 4 feet above the roof of the playset) so that I could get the antenna wire safely above his reach. I *DO* admire your optimism, but if your son is like the vast majority of boys... Well, like I said - I do admire your optimism! Remember when you were his age? Try not to let him see you chuckle if you have to admonish him. Oh, he has it really bad. I know what I was capable of (like unlocking a door with three locks and a hook at the top of the door when I was 2), so I plan accordingly. Seriously, "looks" don't make it perform any better. Put it up the best you can and, if there's a chance kids might attempt something they saw in a Tarzan episode, think "safety". It's better to break off under the partial weight of one kid, than the weight of three or four (think about it). Hmm. You have a point. My son (who's 3, btw), climbed out over the top of the slide on the swingset last summer and hung there by his hands. I was running out to get him, but I knew I wasn't going to make it in time. He let go, fell about 6 feet, got up, and yelled happily, "I did it!!" Besides, if you are like me, and perhaps some others in here, as soon as you get it rigged-up, within a week you'll have "a better idea"... I'm sure about that. Eventually some of the trees that I'll be planting in the backyard will be big enough to hang from them, and I've also been thinking about trying to "recreate" a good Wellbrook type antenna without spending $300+ dollars to get a new one. I'm thinking of modifying the rope to attach to a rope wraparound thing that you'd find at the bottom of a flagpole (yes, I can use technical terms) and reknot it every so often. That'll get me by until summer, and I'll reevaluate things again. --Mike L. You lost me with all that technical jargon {G}, but you may want to make your own cleat with a couple of large nails driven half-way in at opposite angles from each other, so they form a wide "V" (Or more appropriately, a wide "\ /"). That way you can adjust the width as needed to accomodate the loose rope. If you are really brave, after you make that cleat you could give the leftover box of nails and a hammer to your son (who needs "action figures"!). Ugh. I can see that having problems. I've gotten sprayed with paint when my son "helped" me paint the rails of our screened in porch, and I've gotten sprayed by Bug-b-Gone by him as well (accidentally, of course, he thought it was a water gun). --Mike L. |
On Tue, 4 Jan 2005 10:39:58 -0500, "Michael Lawson"
wrote: I'm thinking of modifying the rope to attach to a rope wraparound thing that you'd find at the bottom of a flagpole (yes, I can use technical terms) and reknot it every so often. Cleat. |
CW,
The Tensioning Devices also do a good job for Wind and Ice Loading of the Wire Antenna Element. .. ~ RHF .. |
Something else to beware of is plastic at the connectors. I got a dipole some time back that had each side of the dipole and the connector attached to a piece of plastic. In about two years the plastic had cracked, and broken losing one half the dipole. I continued to RECEIVE ONLY on the half that was left. Now the whole thing is down! I suppose I'll have to put up another antenna of my own some time in the future. So how long does it take to change an insulator? Is this a multi day task? jw k9rzz |
AP.
.. Next time try these types of Wire Antenna Insulators : .. "Dog Bone" Ceramic - Antenna Wire End Insulators http://www.wavehunter.com/cerins.htm http://www.universal-radio.com/catalog/antsup/3250.html http://www.durhamradio.com/s/custome...at=1749&page=1 These Glazed Ceramic Insulators will hold-up for Years and Do NOT Fail due to Exposure to Direct UV Sun Light like many low cost and poor quality plasitcs. .. Van Gorden "Dog-Bone" End-Insulators http://www.universal-radio.com/catalog/antsup/2379.html .. Ceramic "Stain" {Egg} Insulators http://www.universal-radio.com/catalog/antsup/1868.html http://www.universal-radio.com/catalog/antsup/2794.html http://www.durhamradio.com/s/custome...at=1749&page=1 http://www.durhamradio.com/s/custome...at=1749&page=2 These Ceramic "Strain" Insulators have a Compression Strain feature built into them; and if the Ceramic should fail the wires are inter-linked to act as a safety back-up. [ This is my 'choice' for Wire Antenna End Insulators. ] .. Budwig HQ-2 Antenna End Insulator http://www.universal-radio.com/catalog/antsup/3412.html Made of ABS Copolymer, 35% Glass Filled. They are UV Resistant and Weatherproof. .. CIN Alpha Delta End Insulators http://www.durhamradio.com/s/custome...at=1749&page=1 .. Van Gorden HI-Q End-Insulators http://www.universal-radio.com/catalog/antsup/2873.html http://www.unadilla.com/endsulators.htm http://www.durhamradio.com/s/custome...at=1749&page=2 .. Assorted Antenna Wire & Insulators http://www.surplussales.com/Antennas/Antennas-9.html http://www.radioworks.com/cinsul.html .. 3 1/2 " Wood Screw Standoffs With Insulators RadioShack Catalog # 15-853 If you are using 300 Ohm TV type Twin Lead for a Wire Antenna Element these can work well for direct mounting to a build or structure. http://www.radioshack.com/product.as...ct%5Fid=15-853 .. .. WRAPPING THE ANTENNA WIRE THROUGH THE INSULATOR : Her is the Method / Process that I use to Wrap the Antenna Wire Through the Eye (Hole) of the Antenna Insulator. .. Fold over One Foot of Antenna Wire at the End going into the Eye of the Insulator. .. Run/Route the Folded-Wire-End through the Eye of the Insulator leaving about Three Inchs outside / unused Main Antenna Wire exposed. .. Pass the Folded-Wire-End through the Eye of the Insulator a Second Time and Snug-it-Up to lay with the Main Antenna Wire. .. Take the Single Tag-end of the Antenna Wire an place it Perpendicular (90*) to the Main Antenna Wire. .. Take the Folded-Wire-End (Two Wires) and the Main Antenna Wire (One Wire) and TWIST all Three Wires together Counter-Clock-Wise (CCW) like you are forming a Western Ubion Splice. Do this until all of the Folded-Wire-End is used up in the Twist. .. Now take the Single Tag-End Wire (One Wire) and Tightly and Closely OVER-WRAP it Clock-Wise (CW) Around the Three Twisted Wires. Do this until all of the Tag-End Wire is used up in the Wrap. .. RESULT - You have Four Wires (2x2) in the Eye of the Insulator to Distribute the Force and Ware place on it; and Gives it a Double Bite. The CCW Twisting of the Three Wires and then CW Over Wraping of the Single Wire Mechanically LOCK the Four Wires into a Solid Joint. .. .. iane ~ RHF .. All are WELCOME at the Shortwave Listener (SWL) "Antenna Ashram" http://groups.yahoo.com/group/Shortwave-SWL-Antenna/ .. Some Say: On A Clear Day You Can See Forever. http://groups.yahoo.com/group/Shortw...na/message/502 .. I BELIEVE: On A Clear Night . . . You Can Hear Forever and Beyond, The BEYOND ! With a Shortwave Listener SWL Antenna of your own making. "If You Build It {SWL Antenna} You Will Hear Them !" |
I just use black UV rated Ty-Wraps.
On 14 Jan 2005 03:08:23 -0800, "RHF" wrote: AP. . Next time try these types of Wire Antenna Insulators : . "Dog Bone" Ceramic - Antenna Wire End Insulators http://www.wavehunter.com/cerins.htm http://www.universal-radio.com/catalog/antsup/3250.html http://www.durhamradio.com/s/custome...at=1749&page=1 These Glazed Ceramic Insulators will hold-up for Years and Do NOT Fail due to Exposure to Direct UV Sun Light like many low cost and poor quality plasitcs. . Van Gorden "Dog-Bone" End-Insulators http://www.universal-radio.com/catalog/antsup/2379.html . Ceramic "Stain" {Egg} Insulators http://www.universal-radio.com/catalog/antsup/1868.html http://www.universal-radio.com/catalog/antsup/2794.html http://www.durhamradio.com/s/custome...at=1749&page=1 http://www.durhamradio.com/s/custome...at=1749&page=2 These Ceramic "Strain" Insulators have a Compression Strain feature built into them; and if the Ceramic should fail the wires are inter-linked to act as a safety back-up. [ This is my 'choice' for Wire Antenna End Insulators. ] . Budwig HQ-2 Antenna End Insulator http://www.universal-radio.com/catalog/antsup/3412.html Made of ABS Copolymer, 35% Glass Filled. They are UV Resistant and Weatherproof. . CIN Alpha Delta End Insulators http://www.durhamradio.com/s/custome...at=1749&page=1 . Van Gorden HI-Q End-Insulators http://www.universal-radio.com/catalog/antsup/2873.html http://www.unadilla.com/endsulators.htm http://www.durhamradio.com/s/custome...at=1749&page=2 . Assorted Antenna Wire & Insulators http://www.surplussales.com/Antennas/Antennas-9.html http://www.radioworks.com/cinsul.html . 3 1/2 " Wood Screw Standoffs With Insulators RadioShack Catalog # 15-853 If you are using 300 Ohm TV type Twin Lead for a Wire Antenna Element these can work well for direct mounting to a build or structure. http://www.radioshack.com/product.as...ct%5Fid=15-853 . . WRAPPING THE ANTENNA WIRE THROUGH THE INSULATOR : Her is the Method / Process that I use to Wrap the Antenna Wire Through the Eye (Hole) of the Antenna Insulator. . Fold over One Foot of Antenna Wire at the End going into the Eye of the Insulator. . Run/Route the Folded-Wire-End through the Eye of the Insulator leaving about Three Inchs outside / unused Main Antenna Wire exposed. . Pass the Folded-Wire-End through the Eye of the Insulator a Second Time and Snug-it-Up to lay with the Main Antenna Wire. . Take the Single Tag-end of the Antenna Wire an place it Perpendicular (90*) to the Main Antenna Wire. . Take the Folded-Wire-End (Two Wires) and the Main Antenna Wire (One Wire) and TWIST all Three Wires together Counter-Clock-Wise (CCW) like you are forming a Western Ubion Splice. Do this until all of the Folded-Wire-End is used up in the Twist. . Now take the Single Tag-End Wire (One Wire) and Tightly and Closely OVER-WRAP it Clock-Wise (CW) Around the Three Twisted Wires. Do this until all of the Tag-End Wire is used up in the Wrap. . RESULT - You have Four Wires (2x2) in the Eye of the Insulator to Distribute the Force and Ware place on it; and Gives it a Double Bite. The CCW Twisting of the Three Wires and then CW Over Wraping of the Single Wire Mechanically LOCK the Four Wires into a Solid Joint. . . iane ~ RHF . All are WELCOME at the Shortwave Listener (SWL) "Antenna Ashram" http://groups.yahoo.com/group/Shortwave-SWL-Antenna/ . Some Say: On A Clear Day You Can See Forever. http://groups.yahoo.com/group/Shortw...na/message/502 . I BELIEVE: On A Clear Night . . . You Can Hear Forever and Beyond, The BEYOND ! With a Shortwave Listener SWL Antenna of your own making. "If You Build It {SWL Antenna} You Will Hear Them !" . . |
So please tell me, how many S units improvement will one notice using a high
quality ceramic insulator for shortwave reception, over just tying the wire to the support rope? jw k9rzz |
K9RZZ - Sounds like you aleady know the answer.
Care to share it with us ;-) The general theme of this thread was a Mechanical Failure of 'cheap' plasitic Antenna Insulators; and better replacements for them. But as you point out - If you use a quality Plastic 'type' Rope and "Tie" the Rope and Antenna Wire together - That will work also :o) Doubling Over (Double Lay) and Twist together about Eight Inches of the Antenna Wire and a Single Lay of Rope usually works well for a "Secure and Lasting" Knot between the two pieces. iane ~ RHF |
All times are GMT +1. The time now is 12:50 AM. |
Powered by vBulletin® Copyright ©2000 - 2025, Jelsoft Enterprises Ltd.
RadioBanter.com