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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/4RFZ4IU3E3CO264VHGBD3JOFMHYNHX63/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "[email protected]",
    "message_id_hash": "4RFZ4IU3E3CO264VHGBD3JOFMHYNHX63",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/FREILMKHEB7PKNHXDQ7LLTP54PNGIA42/?format=api",
    "sender": {
        "address": "bmepllc (a) yahoo.com",
        "mailman_id": "cdeca28787cb421caf426223179a61f5",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/cdeca28787cb421caf426223179a61f5/emails/?format=api"
    },
    "sender_name": "Lynn Palmer",
    "subject": "Re: [amsat-bb] AO-92 L Band Power",
    "date": "2020-07-09T17:04:47Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/GAMP2LD3JBNL65IPDR2XFAAYZGHSGLQ2/?format=api",
    "children": [],
    "votes": {
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        "status": "neutral"
    },
    "content": "John, \nYes, of course you are right.  It is important to understand ERP to make comparisons. If I use my actual measured SWR and account for additional losses due to a jumper thru the entrance panel and into the shack, the calculated ERP is probably closer to 500 watts assuming the M2 published gain data of 20.94 dBi represents the actual performance of my \"as installed\" antenna setup. \n73sLynn  KD9BVG\n    On Thursday, July 9, 2020, 11:15:38 AM CDT, John Kludt <[email protected]> wrote:  \n \n  All\nThe important thing to remember is ERP.  Using the KV5R calculator and assuming an SWR or 1.2:!  the ERP for this contact was  618 watts.  ( http://kv5r.com/ham-radio/coax-loss-calculator/)  The antenna gain was based on the published gain for the M2 35 element Yagi .\nTen watts may or may not be enough.  What we need to do is look at the overall system of losses ( coax) and gains (antenna).\nHope this helps\nJohn K4SQC\nOn Thu, Jul 9, 2020 at 10:13 AM Lynn Palmer via AMSAT-BB <[email protected]> wrote:\n\nHi Alan, I use 10 watts from my Icom IC-9700. I run about 100 feet of LMR 600 coax so maybe 5 watts to the antenna.  I use a 35 element yagi antenna.  I made the satellite today at 14 degrees elevation OK. \n73sLynnKD9BVG \n\n    On Wednesday, July 8, 2020, 04:53:09 PM CDT, Alan Blind via AMSAT-BB <[email protected]> wrote:  \n\n Using 10 Watts, I have not been able to get into AO-92 L Band.\n\n>From the AO-92 web site:\n\n================\n\n......Since the 435 MHz uplink antenna is used to receive the 1267 MHz\nsignals and may present a mismatch at that frequency, pre-launch estimates\nsuggest that a power level of 100 watts ERP will be required for\nhorizon-to-horizon access in Mode L/v. AMSAT Engineering will issue further\nguidance after in-orbit testing. Look for future articles on the AMSAT\nwebsite and in The AMSAT Journal for equipment ideas and tutorials for\naccessing the L-band uplink.\n====================\n\nPerhaps my 10 Watts are too low.  Have there been updates from AMSAT on\nrecommended L band power?  What power do others run?\n\nAlan\nWA9WUD\n_______________________________________________\nSent via [email protected]. AMSAT-NA makes this open forum available\nto all interested persons worldwide without requiring membership. Opinions expressed\nare solely those of the author, and do not reflect the official views of AMSAT-NA.\nNot an AMSAT-NA member? Join now to support the amateur satellite program!\nSubscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb\n\n_______________________________________________\nSent via [email protected]. AMSAT-NA makes this open forum available\nto all interested persons worldwide without requiring membership. Opinions expressed\nare solely those of the author, and do not reflect the official views of AMSAT-NA.\nNot an AMSAT-NA member? Join now to support the amateur satellite program!\nSubscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb\n\n  \n",
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