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{ "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/4UU4BLYG6JQP26TE7UPPABRB2SZP7FQD/?format=api", "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api", "message_id": "[email protected]", "message_id_hash": "4UU4BLYG6JQP26TE7UPPABRB2SZP7FQD", "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/CMABMPL7RLQH7LSTYGOUAFUWXFPME6HS/?format=api", "sender": { "address": "gallsup (a) whoi.edu", "mailman_id": null, "emails": null }, "sender_name": "geoffrey allsup", "subject": "Re: [amsat-bb] suitable omni antenna for FM sats?", "date": "2019-05-12T01:34:28Z", "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/JUEHCSLVD4ZOH3TU42GXO6ENYBNH5FUY/?format=api", "children": [], "votes": { "likes": 0, "dislikes": 0, "status": "neutral" }, "content": "Hi Ron\n\nI will corroborate what John said. I have made several hundred FM and SSB satellite contacts over the past year using a Diamond X-50A dual-band vertical and IC-9100 or FT-736r, as well as more than 100 FM contacts using a D72A handheld and a dual-band 1/4 wave mag mount on my truck. At least 80 grids towards my VUCC came via these antennas. \n\nI would expect a Comet GP-6 will do fine. Sure, an AZ-EL yagi system would be nice, but I’m a believer in working with what you’ve got and keeping it simple. And pick your passes, especially at the outset (though if there is a clear horizon, even fairly low angle passes will yield contacts). My first few contacts, in fact, were overhead FM sat passes, using a half-duplex HT with a little Diamond dual-band whip.\n\nGood luck and have fun!\ngeoff - W1OH\n\n\n***********************************************************************\nGeoff Allsup, W1OH [email protected] or [email protected]\nSenior Engineer (Retired) Upper Ocean Processes Group\nWoods Hole Oceanographic Institution Woods Hole, MA, USA\n***********************************************************************\n\n> On May 11, 2019, at 18:30, Ron VE8RT via AMSAT-BB <[email protected]> wrote:\n> \n> Thanks John,\n> \n> that would be the easiest solution to start with. VY0YL is s city\n> administrator, not someone with a technical background. Maybe she\n> could get some help locally. I have a Comet GP-6 dual band base\n> antenna still in its shipping tube, I haven't put it up yet so I\n> haven't tried it. They advertise that it has 6.5 dDi gain on 2M and 9\n> dBi on 70 cm I was going to match that up with a TM-V71A to see how\n> well that worked out.\n> \n> At this time, VY0YL has no antenna, or equipment. As equipment that\n> won't do the job may be discouraging getting the first radio operating\n> the first time is important.\n> \n> Ron VE8RT\n> \n> On Sat, 11 May 2019 15:11:23 -0500\n> John Kludt via AMSAT-BB <[email protected]> wrote:\n> \n>> Ron,\n>> \n>> Everything Jeff days is true. But some of us live in covenant restricted settings and an omni is much easier to sneak in under the radar. I have switched back and forth between eggbeaters and various verticals. So far 88 grids. Three points:\n>> \n>> 1) Pay attention to ERP. You are going to need a little more uplink power to make up for the lack of Tx antenna gain.\n>> 2) Always, always use a preamp at the antenna on 435 down links\n>> 3) Be patient. This is a compromise solution and you are not going to knock them down every pass.\n>> \n>> If it is all you can do go ahead. Better to be on the air working the birds as best you can than doing nothing at all.\n>> \n>> John\n>> \n>> Sent from my Verizon Motorola Smartphone\n>> On May 11, 2019 00:34, Jeff Moore via AMSAT-BB <[email protected]> wrote:\n>>> \n>>> As was stated multiple times in a very recent thread - omnis for sat work \n>>> are a poor compromise!! Even a small beam at a 15-degree angle will \n>>> generally blow most omnis off the roof! Even better would be a pair of \n>>> beams (one for uplink, one for downlink) on an azimuth/elevation rotor! \n>>> But handheld can work almost as good!! \n>>> \n>>> 7 3 \n>>> Jeff Moore --- KE7ACY \n>>> CN94 \n>>> \n>>> \n>>> On Fri, May 10, 2019 at 10:08 PM Ron VE8RT via AMSAT-BB <[email protected]> \n>>> wrote: \n>>> \n>>>> We have a newly licenced amateur in DP79. Because they fell a few \n>>>> points of getting their Basic with Honours they do not have HF \n>>>> privileges, their only way to communicate with the outside world is via \n>>>> satellite. Anticipating this possible outcome, that they may not get \n>>>> access to the HF bands, I sent them a hard copy, (no home internet, and \n>>>> its slow and expensive there if you do have it), of the current copy of \n>>>> \"Getting Started with Amateur Satellites\". As we're heading into the \n>>>> time of year to do any outside work, the most pressing question is what \n>>>> is the best compromise antenna for a base station. Keeping in mind \n>>>> their location, in order to work anyone they'll have to get into the \n>>>> satellites while the satellite is close to their horizon, otherwise the \n>>>> satellite footprint will not cover areas with any satellite operators. \n>>>> \n>>>> Ron VE8RT in DP22 \n>>>> \n>>>> -- \n>>>> Ron VE8RT <[email protected]> \n>>>> _______________________________________________ \n>>>> Sent via [email protected]. AMSAT-NA makes this open forum available \n>>>> to all interested persons worldwide without requiring membership. Opinions \n>>>> expressed \n>>>> are solely those of the author, and do not reflect the official views of \n>>>> AMSAT-NA. \n>>>> Not an AMSAT-NA member? Join now to support the amateur satellite program! \n>>>> Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb \n>>>> \n>>> _______________________________________________ \n>>> Sent via [email protected]. AMSAT-NA makes this open forum available \n>>> to all interested persons worldwide without requiring membership. Opinions expressed \n>>> are solely those of the author, and do not reflect the official views of AMSAT-NA. \n>>> Not an AMSAT-NA member? Join now to support the amateur satellite program! \n>>> Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb \n>> _______________________________________________\n>> Sent via [email protected]. AMSAT-NA makes this open forum available\n>> to all interested persons worldwide without requiring membership. Opinions expressed\n>> are solely those of the author, and do not reflect the official views of AMSAT-NA.\n>> Not an AMSAT-NA member? Join now to support the amateur satellite program!\n>> Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb\n> \n> \n> -- \n> Ron VE8RT <[email protected]>\n> _______________________________________________\n> Sent via [email protected]. AMSAT-NA makes this open forum available\n> to all interested persons worldwide without requiring membership. Opinions expressed\n> are solely those of the author, and do not reflect the official views of AMSAT-NA.\n> Not an AMSAT-NA member? Join now to support the amateur satellite program!\n> Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb\n> \n\n", "attachments": [] }