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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/EQRJ5P27ZBVXUX3LZZKZF3J7VJGVPJXG/",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/",
    "message_id": "CAHKCqnDpXpeNE7jpzjyjMy9p806sMWE7P5Z53iuBwNibDFWifg@mail.gmail.com",
    "message_id_hash": "EQRJ5P27ZBVXUX3LZZKZF3J7VJGVPJXG",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/7M34OFTWQU54XX6GEZLXGLFEPNMUDLTK/",
    "sender": {
        "address": "mjohns+K0JM (a) luther.edu",
        "mailman_id": null,
        "emails": null
    },
    "sender_name": "Mark D. Johns",
    "subject": "Re: [amsat-bb] input power question",
    "date": "2019-06-16T21:18:04Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/JEOXEUJ5SRG75IAMO5LL3ZXK4ELUTAK5/",
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Ken,\n\nOthers have already chimed in with some others. I'm partial to the\nMini-2 and Mini-70 from http://www.shf-elektronik.de/en/\n--\nMark D. Johns\nKØJM / MØGZO / ex-9H3DJ / ex-KØMDJ\nBrooklyn Park, MN USA   EN35hd\n-----------------------------------------------\n\"Heaven goes by favor; if it went by merit,\n   you would stay out and your dog would go in.\"\n    ---Mark Twain\n\nOn Sun, Jun 16, 2019 at 11:18 AM Ken M via AMSAT-BB <[email protected]> wrote:\n>\n> Hello Mark,\n>\n> Picking up on your comment about UHF pre-amps that \"can be had for less\n> than $150 from several manufacturers\", could you provide a list or some\n> suggestions. I haven't searched exhaustively but some of seen are north\n> of $300 and I would love to find a less expensive, but quality, option.\n>\n> Thanks & 73, Ken, VA7KBM\n>\n> On 2019-06-16 6:46 a.m., Mark D. Johns via AMSAT-BB wrote:\n> > This is a very common issue for newcomers to the linear satellites.\n> > Almost every pass, there is someone calling CQ over and over again\n> > with a loud signal, but completely oblivious to the several stations\n> > trying to answer them.\n> >\n> > Downlinks on the linear satellites, especially on UHF, are MUCH weaker\n> > than on the FM satellites. Remember that the transmit power of the\n> > satellite is being distributed across an entire passband that many\n> > stations are sharing -- unlike FM, where all the power is just on one\n> > frequency for one station at a time (ideally).\n> >\n> > You are going to need the best, low-loss feedline you can afford for\n> > UHF, and that feedline needs to be as short as possible. If your\n> > feedline is more than about 50 feet (or about 15 meters) you are going\n> > to want to have a pre-amplifier very near the antenna. A good pre-amp,\n> > with RF switching so that you don't accidentally blow it up by\n> > transmitting through it, can be had for less than $150 from several\n> > manufacturers. Or, there are designs around to roll your own, if you\n> > are good at that sort of thing.\n> >\n> > Good luck, and hope to work you on the linear sats very soon!\n> > --\n> > Mark D. Johns\n> > KØJM / MØGZO / ex-9H3DJ / ex-KØMDJ\n> > Brooklyn Park, MN USA   EN35hd\n> > -----------------------------------------------\n> > \"Heaven goes by favor; if it went by merit,\n> >     you would stay out and your dog would go in.\"\n> >      ---Mark Twain\n> >\n> > On Sun, Jun 16, 2019 at 7:26 AM WB8PFZ via AMSAT-BB <[email protected]> wrote:\n> >> I have completed my sat station but am having trouble hearing myself. I have checked cables and antenna ( M2) sat antenna. All seems well with low SWR. I can hear on the 2 meter downlink. How much power is needed on the UHF uplink? Hope to figure this out shortly. This is being done on the SSB sats. Thanks Mike WB8PFZ\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> 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",
    "attachments": []
}