- 1. [TowerTalk] 40/80m dipole (score: 1)
- Author: Dan <n5ar@air-pipe.com>
- Date: Wed, 24 Mar 2010 19:43:56 -0700
- I would like to build and send to my son a coil loaded dipole for 80/40m. He has about 90 feet space to hang it in. Has anyone information on loading coil values and placement in the 90 ft dipole? Tn
- /archives//html/Towertalk/2010-03/msg00501.html (6,618 bytes)
- 2. Re: [TowerTalk] 40/80m dipole (score: 1)
- Author: n8de@thepoint.net
- Date: Wed, 24 Mar 2010 23:01:49 -0400
- Dan, How about two parallel dipoles from the same feedpoint with the 80m dipole strung between the 90' supports and about 20' at each end hanging down. The 40m dipole could then be 'fanned' downward
- /archives//html/Towertalk/2010-03/msg00502.html (8,674 bytes)
- 3. Re: [TowerTalk] 40/80m dipole (score: 1)
- Author: "Gene Smar" <ersmar@verizon.net>
- Date: Wed, 24 Mar 2010 23:42:36 -0400
- Dan: I concur with Don's recommendation about using two dipoles on the same feedline. I used this arrangement (with a third dipole for 20M) during my Novice days and it worked well for me. The non-re
- /archives//html/Towertalk/2010-03/msg00503.html (9,699 bytes)
- 4. Re: [TowerTalk] 40/80m dipole (score: 1)
- Author: "David J. Sourdis - HK1A" <hk1kxa@hotmail.com>
- Date: Wed, 24 Mar 2010 22:54:22 -0500
- Trim the longest dipole first. David HK1A EC5KXA _________________________________________________________________ Hotmail: Trusted email with powerful SPAM protection. https://signup.live.com/signup
- /archives//html/Towertalk/2010-03/msg00504.html (11,933 bytes)
- 5. Re: [TowerTalk] 40/80m dipole (score: 1)
- Author: "Tom Osborne" <w7why@verizon.net>
- Date: Wed, 24 Mar 2010 21:02:37 -0700
- Right. And, bandwidth will be a lot better with the parallel dipoles. Sometimes, shortening a dipole can really make them kinda narrow. 73 and GL Tom W7WHY ___________________________________________
- /archives//html/Towertalk/2010-03/msg00505.html (8,331 bytes)
- 6. Re: [TowerTalk] 40/80m dipole (score: 1)
- Author: "Jim Brown" <jim@audiosystemsgroup.com>
- Date: Wed, 24 Mar 2010 23:02:24 -0700
- While I'm a fan of fan dipoles and have four of them in the air, I'm going to take a contrarian viewpoint, in view of the fact that his space is limited, and that there is a very nice loaded dipole y
- /archives//html/Towertalk/2010-03/msg00509.html (8,768 bytes)
- 7. Re: [TowerTalk] 40/80m dipole (score: 1)
- Author: GALE STEWARD <k3nd@yahoo.com>
- Date: Thu, 25 Mar 2010 06:07:18 -0700 (PDT)
- Check out KU3X's website. I have one of his antennas up now (20-40) as a sloper SE. The antenna works well. http://www.angelfire.com/electronic/hypower/ 73, Stew K3ND ________________________________
- /archives//html/Towertalk/2010-03/msg00510.html (8,726 bytes)
- 8. Re: [TowerTalk] 40/80m dipole (score: 1)
- Author: Dan <n5ar@air-pipe.com>
- Date: Thu, 25 Mar 2010 07:39:31 -0700
- I should have mentioned that the 40/80 antenna for my son will be almost vertical. He has a single pulley in a tall tree to suspend the antenna. I agree that the fan dipole or bent full size dipoles
- /archives//html/Towertalk/2010-03/msg00512.html (9,242 bytes)
- 9. Re: [TowerTalk] 40/80m dipole (score: 1)
- Author: "Jim Miller KG0KP" <JimMiller@STL-OnLine.Net>
- Date: Thu, 25 Mar 2010 10:19:44 -0500
- Dan, The direct answer to your question is to use these two websites to calculate the inductance (coil) you will need based on your choice of location and then to design the coil you can build. http:
- /archives//html/Towertalk/2010-03/msg00513.html (9,842 bytes)
- 10. Re: [TowerTalk] 40/80m dipole (score: 1)
- Author: "Jim Brown" <jim@audiosystemsgroup.com>
- Date: Thu, 25 Mar 2010 08:40:05 -0700
- Several thoughts. First, a vertical dipole is not a very good antenna. I say that from direct experience -- I have a 40M vertical dipole with the top suspended at about 100 ft from a tall redwood. It
- /archives//html/Towertalk/2010-03/msg00514.html (10,403 bytes)
- 11. Re: [TowerTalk] 40/80m dipole (score: 1)
- Author: Dan <n5ar@air-pipe.com>
- Date: Thu, 25 Mar 2010 08:42:57 -0700
- Exactly what I need to do the job Jim. Tnx 73, Dan _______________________________________________ _______________________________________________ TowerTalk mailing list TowerTalk@contesting.com http
- /archives//html/Towertalk/2010-03/msg00515.html (10,864 bytes)
- 12. Re: [TowerTalk] 40/80m dipole (score: 1)
- Author: navydude1962@yahoo.com
- Date: Thu, 25 Mar 2010 19:00:17 +0000
- Why not go with open feedline? Sent from my Verizon Wireless BlackBerry Dan, The direct answer to your question is to use these two websites to calculate the inductance (coil) you will need based on
- /archives//html/Towertalk/2010-03/msg00521.html (10,834 bytes)
- 13. Re: [TowerTalk] 40/80m dipole (score: 1)
- Author: "David Thompson" <thompson@mindspring.com>
- Date: Thu, 25 Mar 2010 15:29:18 -0400
- Dan, The ARRL antenna book has a section on winding coils as you are looking for. Depends on how far out the wire the coil will be needed. I suggest a coil that traps 40 at the 1/2 wave point on 40 a
- /archives//html/Towertalk/2010-03/msg00522.html (11,819 bytes)
- 14. Re: [TowerTalk] 40/80m dipole (score: 1)
- Author: "D Calder" <towertalk@n4zkf.com>
- Date: Thu, 25 Mar 2010 16:24:28 -0400
- I created one when I had limited space a few years ago and had good luck with it. I scanned the paper I made up at the time and can give you the coil specs if interested. http://www.n4zkf.com/files/8
- /archives//html/Towertalk/2010-03/msg00523.html (9,025 bytes)
- 15. Re: [TowerTalk] 40/80m dipole (score: 1)
- Author: "Tod -MN" <tod@k0to.us>
- Date: Thu, 25 Mar 2010 15:50:51 -0500
- Depending on the height he has available consider using a C-pole. [QST April 2004] and also found in more detail in the new ARRL Antenna Designer's Handbook. Tod, K0TO _______________________________
- /archives//html/Towertalk/2010-03/msg00524.html (11,344 bytes)
- 16. Re: [TowerTalk] 40/80m dipole (score: 1)
- Author: "D Calder" <towertalk@n4zkf.com>
- Date: Thu, 25 Mar 2010 18:49:10 -0400
- Let's try this for the space in the link. http://www.n4zkf.com/files/80-40%20Dipole.jpg I created one when I had limited space a few years ago and had good luck with it. I scanned the paper I made up
- /archives//html/Towertalk/2010-03/msg00526.html (9,744 bytes)
- 17. Re: [TowerTalk] 40/80m dipole (score: 1)
- Author: Dan <n5ar@air-pipe.com>
- Date: Thu, 25 Mar 2010 17:30:29 -0700
- That works much better Dave. I would be interested in the coil specs. Thanks for your help. 73, Dan _______________________________________________ _______________________________________________ Tow
- /archives//html/Towertalk/2010-03/msg00527.html (10,997 bytes)
- 18. Re: [TowerTalk] 40/80m dipole (score: 1)
- Author: "Gene Fuller" <w2lu@rochester.rr.com>
- Date: Thu, 25 Mar 2010 21:30:21 -0400
- Nice idea but need spec's on the coil. Gene / W2LU _______________________________________________ _______________________________________________ TowerTalk mailing list TowerTalk@contesting.com http
- /archives//html/Towertalk/2010-03/msg00528.html (10,935 bytes)
- 19. Re: [TowerTalk] 40/80m dipole (score: 1)
- Author: "D Calder" <towertalk@n4zkf.com>
- Date: Thu, 25 Mar 2010 22:34:09 -0400
- I'll send them out tomorrow. I still have the antenna. I'll take all the measurements and a pic. 73 Dave Nice idea but need spec's on the coil. Gene / W2LU ___________________________________________
- /archives//html/Towertalk/2010-03/msg00529.html (11,696 bytes)
- 20. Re: [TowerTalk] 40/80m dipole (score: 1)
- Author: "Tom Osborne" <w7why@verizon.net>
- Date: Thu, 25 Mar 2010 20:21:53 -0700
- Hi Jim Remember the old 'twisted pair" feedline? I used a lot of that stuff way back when. I had a ham friend who worked for the telephone company and he had lots of that stuff. Old copper coated ste
- /archives//html/Towertalk/2010-03/msg00532.html (9,435 bytes)
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