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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/QELXJIAMVX2YNHPNDKUMNJU3UVJP7SE6/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "CABGf72o=ucOWYoDaKVyT-r60cjLpnP-pQLhHfg5UWZUqVjakvA@mail.gmail.com",
    "message_id_hash": "QELXJIAMVX2YNHPNDKUMNJU3UVJP7SE6",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/4AG2O7D7LVIC7V5BRQLR6AK7DVC4ITHU/?format=api",
    "sender": {
        "address": "tosca005 (a) umn.edu",
        "mailman_id": null,
        "emails": null
    },
    "sender_name": "John Toscano",
    "subject": "Re: [amsat-bb] Any experience with low-cost 433MHz transverter from\ttransverters-store?",
    "date": "2016-01-31T23:12:16Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/4AG2O7D7LVIC7V5BRQLR6AK7DVC4ITHU/?format=api",
    "children": [
        "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/WJ4DCKW7EMJTSHZ3RX5Y32RXUVHLB2FQ/?format=api"
    ],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "The transverter itself can cover the satellite portion of the band. The\nspecs say it covers 432 - 442 MHz. The issue is that your IF radio, the\nIcom IC-706MkII is what I believe you meant to say, can tune high enough on\nthe 10M band and above for RECEPTION at the appropriate frequencies, but\nwill not transmit above 30 MHz and therefore, through this transverter,\nwill not transmit above 435.0000 MHz. I know this from experience with my\n222 MHz transverter. Fortunately, on that band, 28-30 MHz -> 222-224 MHz,\nand the portion of the band above that (224-225 MHz) is mostly FM repeater\nOUTPUTS, which the radio will happily receive through my transverter.\n\nWhat you would need to do is defeat the 10M band transmit limits on your\nIC-706MkII. You can probably find mods to allow that.\n\nYour other issue, which I also had to overcome with my 222 transverter, is\nthat the transverter needs (accepts) only a very low RF power signal on\ntransmit (1-100 milliwatts) and your IC-706MkII is happy to transmit 1000\ntimes as much power, up to 100 watts. So you will need to carefully\ninterface the radio to the transverter to insure that the transmit power is\nnice and low. In my case, my transverter interface includes a source of\nnegative voltage to feed into the ALC input of the radio, which can drop\nthe power low enough. Interesting (=undesirable)  things happen if this ALC\ncircuit fails, or more likely, gets accidentally disconnected. I was\nfortunate, when I transmitted 100 watts into my transverter by accident, I\nonly fried a 50 ohm resistor in the input circuit, and after replacing it,\nall was good again, The same may or may not hold with this transverter.\n\nGood luck in your search for a solution.\n\nJohn Toscano, W0JT/5\n\nOn Sun, Jan 31, 2016 at 12:46 PM, Eric Wolak <[email protected]> wrote:\n\n> Hi folks,\n>\n> I'm trying to get on the air with the linear transponder satellites, and\n> it looks like I need 70cm SSB capability to really get on the air. My\n> Icom IC-796MkII can do SSB on 2m, but not 70cm, so I'm trying to find an\n> affordable way to get 70cm SSB transmit.\n>\n> Does anybody have experience with these $100 transverter boards from\n> Ukraine? It looks like they're tuned for the weak-signal/SSB end of the\n> band and might require a bit of work to get up to 435MHz for satellites.\n> Is 3-4W enough to be heard?\n>\n> http://www.ebay.com/itm/221871269275\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: http://www.amsat.org/mailman/listinfo/amsat-bb\n>\n",
    "attachments": []
}