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GET /hyperkitty/api/list/[email protected]/email/FGWHTLMO4LO5GTBQL6ANHSZFHN2CGR6D/
{ "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/FGWHTLMO4LO5GTBQL6ANHSZFHN2CGR6D/", "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/", "message_id": "[email protected]", "message_id_hash": "FGWHTLMO4LO5GTBQL6ANHSZFHN2CGR6D", "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/E7PGJANRP4RF55HIK3TA6TO2C5EXL6I7/", "sender": { "address": "rnutter (a) networkref.com", "mailman_id": "9d4409219c4248a6be735e65e52a44fc", "emails": "https://mailman.amsat.org/hyperkitty/api/sender/9d4409219c4248a6be735e65e52a44fc/emails/" }, "sender_name": "Ronald Nutter", "subject": "[amsat-bb] Re: Suggestions for Mode L antenna", "date": "2008-05-13T02:55:20Z", "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/E7PGJANRP4RF55HIK3TA6TO2C5EXL6I7/", "children": [ "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/CWJDHGOW5T34EJIPICW3PK7YZSFEBNMQ/" ], "votes": { "likes": 0, "dislikes": 0, "status": "neutral" }, "content": "Greg:\n\nI havent worked with hardline before. This may be getting mvoed from \ntime to time. For now, I will have it at home. I would like to move it \nto a Field Day location in June. Will hardline tolerate that or should \nI look at another type of feed line ?\n\nRon\n\nGreg D. wrote:\n> Hi Ron,\n> \n> I built the helix because they are fairly tolerant of slight differences in materials and assembly dimensions. I am by no means a precision builder, so this seemed right for me.\n> \n> I have an ICOM 1271A in the shack, which is supposed to put out about 10 watts. This goes to about 5 feet of RG-214 (I think - it's the 50 ohm stuff that looks like RG-8, but has better shielding), to a box outside where there's supposed to be a lightning arrestor. That's on my list of things-to-buy-soon... Right now the arrester is just an N-N barrel connector. That feeds about 60' of Andrew hardline (LDF4-50A) up to the roof, where there is another barrel connector and another about 5' of that RG-214 to go around the antenna rotor to the antenna itself.\n> \n> At 1.2 ghz and 50-odd feet, I expect that hardline is going to be a requirement. Or you could mount a power amp and pre-amp at the other end of the coax, along with power and sequencing logic. The hardline I got was a trade from another ham who worked, I'm guessing, in the CATV, Telephone, or similar industry. I got something like 180 feet of it in trade for a short 70cm antenna, enough for 3 runs to the roof. There was a bit of a kink in the middle, so that run is on a lower band :-). Ask around, you might be able to scrounge up something.\n> \n> Good luck,\n> \n> Greg KO6TH\n> \n> \n> ----------------------------------------\n>> Date: Mon, 12 May 2008 07:50:44 -0500\n>> From: [email protected]\n>> To: [email protected]\n>> CC: [email protected]\n>> Subject: Re: [amsat-bb] Re: Suggestions for Mode L antenna\n>>\n>> Greg:\n>>\n>> Thanks for your option. My antenna building abilities havent been the\n>> best, so I am looking at commercially made antennas.\n>>\n>> What type of coax/feedline should I use ? I will probably have the run\n>> under 50 ft. I would hope I dont have to use hardline as that will\n>> probably be very expensive with the price of copper. As I get close to\n>> the antenna, should I shift over to a different type of coax/feedline so\n>> that I can rotate the antenna to track AO-51 ?\n>>\n>> Ron\n>> KA4KYI\n>>\n>> Greg D. wrote:\n>>> Hi Ron,\n>>>\n>>> I've done ok on AO-51 with a homemade helix. See http://home.wavecable.com/~ko6th at the bottom of the page. I also have watts in the shack, but a full az/el rotor system. I don't know how sharp the pattern is for the helix, so I don't know how effective a fixed elevation system will be. But from the reports I've received, the 10 watts and my 60' of hardline with about 7 feet of RG-214 at each end seems to be quite adequate.\n>>>\n>>> Good luck,\n>>>\n>>> Greg KO6TH\n>>>\n>>> ----------------------------------------\n>>>> Date: Sun, 11 May 2008 20:49:23 -0500\n>>>> From: [email protected]\n>>>> To: [email protected]\n>>>> Subject: [amsat-bb] Suggestions for Mode L antenna\n>>>>\n>>>> I am considering purchasing the 1.2 ghz module for my IC-910H. For my\n>>>> satellite work, I have my antennas angled at about 20 degrees since I\n>>>> dont have an az/el rotor. This setup worked reasonably well with Mode S\n>>>> this weekend. What are my chances to be able to work Mode L with this\n>>>> kind of setup ? Also, I would appreciate any suggestions for an antenna\n>>>> that I could use. With only 10 watts, I am not expecting a great signal\n>>>> but I would hope to have at least a readable signal. Also, would\n>>>> appreciate any suggestions as to coax/feedline that I should look at\n>>>> buying ?\n>>>>\n>>>> Thanks,\n>>>>\n>>>> Ron\n>>>> KA4KYI\n>>>> _______________________________________________\n>>>> Sent via [email protected]. Opinions expressed are those of the author.\n>>>> Not an AMSAT-NA member? Join now to support the amateur satellite program!\n>>>> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb\n>>> _________________________________________________________________\n>>> Windows Live SkyDrive lets you share files with faraway friends.\n>>> http://www.windowslive.com/skydrive/overview.html?ocid=TXT_TAGLM_WL_Refresh_skydrive_052008\n>>> _______________________________________________\n>>> Sent via [email protected]. Opinions expressed are those of the author.\n>>> Not an AMSAT-NA member? Join now to support the amateur satellite program!\n>>> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb\n>>>\n> \n> _________________________________________________________________\n> Stay in touch when you're away with Windows Live Messenger.\n> http://www.windowslive.com/messenger/overview.html?ocid=TXT_TAGLM_WL_Refresh_messenger_052008\n", "attachments": [] }