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Total 36 documents matching your query.

1. [TowerTalk] Coax question (score: 1): Author: n4zr@contesting.com (Pete Smith); Date: Wed, 17 Oct 2001 15:21:10 -0400; My 80-meter lazy-vee parasitic array uses the inductive reactance of the unused coax feedlines, whose center conductors and shields are floated, to electrically lengthen the unused dipoles so they ac; /archives//html/Towertalk/2001-10/msg00342.html (7,754 bytes)
2. [TowerTalk] coax question (score: 1): Author: gdaught6@leland.Stanford.EDU (gdaught6@leland.Stanford.EDU); Date: Sat, 15 Aug 1998 14:09:05 +0000; hi all, i was just given a piece of coax, belden 9208. it says on it "rg-8 type" and it's very flexible, more so than 8214, so i'm assuming it's foam dielectric, multi-stranded center conductor. (it; /archives//html/Towertalk/1998-08/msg00476.html (7,352 bytes)
3. [TowerTalk] coax question (score: 1): Author: lburke@wt.net (Larry Burke); Date: Sat, 15 Aug 1998 16:38:52 -0500; Resending my reply..... "CONSTESTING.COM" only exists in the minds of people with fat fingers! Larry To: <towertalk@contesting.com> "Broadcast Cables". Some of the characteristics: them. To: <towerta; /archives//html/Towertalk/1998-08/msg00478.html (9,942 bytes)
4. [TowerTalk] coax question (score: 1): Author: aa6eg@cv.tmx.com (Pat Barthelow); Date: Sun, 16 Aug 1998 13:28:37 -0700 (PDT); Hi George, and the group.... I Just took delivery on an MFJ 259 (B) model, and it would be the perfect thing to test your cable. Come on down some weekend to N6IJ and check it out....Also, look at th; /archives//html/Towertalk/1998-08/msg00485.html (8,661 bytes)
5. [TowerTalk] Coax Question (score: 1): Author: Steve Bagley <n2mai@arrl.net>; Date: Mon, 12 Apr 2010 21:07:25 -0400; This may be a little off topic but I would appreciate your input. I am putting up a tower and will need to run about 500 feet of coax. Should I go with LMR-400 or 213? Any comments or input would be; /archives//html/Towertalk/2010-04/msg00328.html (7,337 bytes)
6. Re: [TowerTalk] Coax Question (score: 1): Author: "Mike" <noddy1211@sbcglobal.net>; Date: Mon, 12 Apr 2010 19:48:46 -0700; Half inch Hard Line with LM-400 flex up the tower. Mike This may be a little off topic but I would appreciate your input. I am putting up a tower and will need to run about 500 feet of coax. Should I; /archives//html/Towertalk/2010-04/msg00329.html (7,762 bytes)
7. Re: [TowerTalk] Coax Question (score: 1): Author: Hector Garcia XE2K <j_hector_garcia@sbcglobal.net>; Date: Mon, 12 Apr 2010 20:08:35 -0700 (PDT); Steve Use this calculator and try to stay below or around 1 DB coax loss in your budget My choice is at least 7/8 heliax and some lmr600 up the tower, remote coax selector at the top Here the thing i; /archives//html/Towertalk/2010-04/msg00330.html (8,715 bytes)
8. Re: [TowerTalk] Coax Question (score: 1): Author: N7KA@comcast.net; Date: Tue, 13 Apr 2010 04:38:09 +0000 (UTC); Steve It that is a foot foot run from rig t ante4nna you have some serious work to do. You need t study what loff you will get in 500ft of what ever feed line you use. Here is some very basic info on; /archives//html/Towertalk/2010-04/msg00332.html (9,811 bytes)
9. Re: [TowerTalk] Coax Question (score: 1): Author: Ken Boasi <n2zn@rochester.rr.com>; Date: Tue, 13 Apr 2010 00:50:14 -0400; Steve, You can find W3LPL's coax attenuation charts here: http://www.k1ttt.net/technote/coaxloss.html I have found this to be a handy reference. You can also add in the loss for the LMR series cables; /archives//html/Towertalk/2010-04/msg00333.html (11,726 bytes)
10. Re: [TowerTalk] Coax Question (score: 1): Author: "Jim Brown" <jim@audiosystemsgroup.com>; Date: Mon, 12 Apr 2010 23:04:08 -0700; http://audiosystemsgroup.com/Coax-Stubs.pdf 500 ft is a LONG run. You can easily burn half your TX power (3dB) in the coax. Many of us try to keep feedline loss under 1 dB. 500 ft of LMR400 is 3.3 dB; /archives//html/Towertalk/2010-04/msg00334.html (8,525 bytes)
11. Re: [TowerTalk] Coax Question (score: 1): Author: van wd8aam <vlincoln@frontiernet.net>; Date: Tue, 13 Apr 2010 07:15:58 +0000; In regards to long runs of coax, has any thought EVER been given to RG213 to a remote tuned high power amplifier at the base of the tower. I've thought about it, and for costs, it might be cost effec; /archives//html/Towertalk/2010-04/msg00335.html (10,128 bytes)
12. Re: [TowerTalk] Coax Question (score: 1): Author: "Dick Dievendorff" <dieven@comcast.net>; Date: Tue, 13 Apr 2010 00:23:38 -0700; I'd say that's a relatively expensive and potentially dangerous item to leave outside in the snow. I want to be near enough to observe the amplifier's operating characteristics and be aware of any fu; /archives//html/Towertalk/2010-04/msg00336.html (11,488 bytes)
13. Re: [TowerTalk] Coax Question (score: 1): Author: "Roger (K8RI)" <K8RI-on-TowerTalk@tm.net>; Date: Tue, 13 Apr 2010 03:33:32 -0400; and with some hunting you should be able to find 7/8" removed from commercial service at reasonable prices and quite possibly with 7-16 connectors. New connectors for 7/8" as well as LMR 1200 are exp; /archives//html/Towertalk/2010-04/msg00337.html (10,470 bytes)
14. Re: [TowerTalk] Coax Question (score: 1): Author: Cqtestk4xs@aol.com; Date: Tue, 13 Apr 2010 04:16:23 EDT; My choice is at least 7/8 heliax and some lmr600 up the tower, remote coax selector at the top ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~ I've never been a big fan; /archives//html/Towertalk/2010-04/msg00338.html (8,060 bytes)
15. Re: [TowerTalk] Coax Question (score: 1): Author: "Roger (K8RI)" <K8RI-on-TowerTalk@tm.net>; Date: Tue, 13 Apr 2010 05:11:26 -0400; I have the same thoughts about the remote amp at the tower. I use remote antenna switches, but they are only 20 to 30 feet up the tower. IOW easy to get at. The shield of the coax is grounded at both; /archives//html/Towertalk/2010-04/msg00339.html (9,289 bytes)
16. Re: [TowerTalk] Coax Question (score: 1): Author: Tom Haavisto <kamham69@gmail.com>; Date: Tue, 13 Apr 2010 06:47:57 -0400; As other have indicated, not a good idea. One thing I would also add though - 5 db of loss in your cable on the TX side also means 5 db of loss on the RX side as well.... Best to try and get your cab; /archives//html/Towertalk/2010-04/msg00340.html (9,782 bytes)
17. Re: [TowerTalk] Coax Question (score: 1): Author: Ryan Jairam <rjairam@gmail.com>; Date: Tue, 13 Apr 2010 06:48:15 -0400; I agree with everyone who suggested hardline. I have andrew LDF4 and LDF5 hardline for all of my ham antennas except for an inverted vee which I use 450 ohm balanced line for. The only antenna I have; /archives//html/Towertalk/2010-04/msg00341.html (9,982 bytes)
18. Re: [TowerTalk] Coax Question (score: 1): Author: Steve Hunt <steve@karinya.net>; Date: Tue, 13 Apr 2010 12:36:35 +0100; When you are doing the coax loss calculations, don't just assume a matched load. I don't know what antennas you will have at the end of the run, but is it possible they might have a VSWR of 1.5:1 or; /archives//html/Towertalk/2010-04/msg00342.html (9,158 bytes)
19. Re: [TowerTalk] Coax Question (score: 1): Author: Kipton Moravec <kip@kdream.com>; Date: Tue, 13 Apr 2010 06:23:00 -0500; I would probably put a Software Defined Radio (and computer) at the base of the tower and run Ethernet cable back to the shack. Even with that you will need a switch in the middle as Ethernet has len; /archives//html/Towertalk/2010-04/msg00343.html (9,963 bytes)
20. Re: [TowerTalk] Coax Question (score: 1): Author: K7LXC@aol.com; Date: Tue, 13 Apr 2010 08:25:41 EDT; given to RG213 to a remote tuned high power amplifier at the base of the tower. I've thought about it, and for costs, it might be cost effective. I'm sure someone has this working for them somewhere.; /archives//html/Towertalk/2010-04/msg00344.html (8,867 bytes)

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