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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/KTJ4MUKGCBMQXMUIJNLVVGLUX2BV32QL/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "[email protected]",
    "message_id_hash": "KTJ4MUKGCBMQXMUIJNLVVGLUX2BV32QL",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/INMUFRJ4CLD5LWKCPUEVE5RDVHUVG5SW/?format=api",
    "sender": {
        "address": "nx7u (a) cox.net",
        "mailman_id": null,
        "emails": null
    },
    "sender_name": "Scott Townley",
    "subject": "[amsat-bb] Re: Preamps on IC-910",
    "date": "2007-10-01T20:26:14Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/INMUFRJ4CLD5LWKCPUEVE5RDVHUVG5SW/?format=api",
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Alan's figures on the icom preamp draw match mine.\nFWIW I use ARR mast-mount preamps with my IC-821.  Unless something major changed between models.\nAlso, if you are using the RF-sensing ARR preamps (which the 200mA draw would be), then in one sense you are semi-protected from reversing modes by the RF sense/PTT in the preamp.  However, that semi-protection has been known to fail, which is why the weak-signal community is so disposed to sequencers.\nPersonally (again, on my IC-821) I found it so painful to switch the preamp power from one mode to another than I ended up running preamp power separately and just using lit toggle switches.  You have to go into the menu on the '821 to set the preamp power to 2m/70cm/both/none...too many button pushes and opportunities for error.\n\n--\nScott Townley NX7U\nGilbert, AZ  DM43di\n\n---- WB2LLP <[email protected]> wrote: \n> I am trying to improve my satellite receiving capability but find it interesting that I can not find anything in the IC-910 literature that specifies how much current the radio can supply  for a pre-amp.  It is also interesting to note that they do not specify the current drawn by their pre-amps, or their noise figure.  \n> \n> I want to use ARR preamps but can not determine if the radio can safely supply the 200 ma they want. I would certainly not want to damage the radio trying to improve the hearing.  I assume that there is someone on this reflector who is using those pre-amps on a 910 and confirm that it works or does not work.\n> \n> The other question might be is it safer to power the pre-amps from a separate supply.  This might make it safer when reversing the up and down bands.  \n> \n> Gene   \n> WB2LLP \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",
    "attachments": []
}