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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/KTXR5XOMSGNR4G3LVTLZRIQZWDZVA4F3/",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/",
    "message_id": "[email protected]",
    "message_id_hash": "KTXR5XOMSGNR4G3LVTLZRIQZWDZVA4F3",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/KXIE5FG45ZQM7ST5RHDKIA6VZ77T6LGF/",
    "sender": {
        "address": "jfloyd (a) es.vccs.edu",
        "mailman_id": "70d469d92b644ab383aaa9118343282a",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/70d469d92b644ab383aaa9118343282a/emails/"
    },
    "sender_name": "John Floyd",
    "subject": "[amsat-bb] Re: Battery-powered UHF Preamp suitable for Arrow or\tElk\tandHT?",
    "date": "2011-03-04T15:14:39Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/KXIE5FG45ZQM7ST5RHDKIA6VZ77T6LGF/",
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "The Ramsey pre-amps are high gain and sensitive particularly considering the price. I use them on a discone for general reception, usually hooked to a PCR-1000. The only problem I have had is lightning susceptability. I have never had one survive a summer on the Virginia coast. I want to try again with a gas discharge tube in front of it. Also, the broad bandwidth increases intermod. Seems like not a problem for a handheld application unless you like to point antennas at the sky during thunderstorms.\n\nJohn,\nKN4GE\n________________________________________\nFrom: [email protected] [[email protected]] on behalf of K5OE [[email protected]]\nSent: 04 March 2011 09:31\nTo: [email protected]\nSubject: [amsat-bb] Battery-powered UHF Preamp suitable for Arrow or Elk        andHT?\n\nBryan,\nI built a cheap (about $17 as I recall) little Ramsey UHF preamp in a small enclosure with a 9 V battery rubber-banded to the Arrow boom, but found the Arrow had so much gain at 70 cm, even AO-27 was workable at the horizon.  I used an external MFJ diplexer in lieu of the Arrow built-in-handle diplexer to protect the preamp from RF on transmit (worked fine, BTW).   If you don't find you can hear that well, take a look at your coax and connectors between the antenna and the rig for unusual losses.\n\nI occasionally see the ARR non-relay preamps going on ebay for under $50 as well, and one of those with a double-ended BNC connector would bolt right onto the Arrow driven element connector.\n\n73,\nJerry, K5OE\n\n\n\n> Does anyone have a recommendation for a UHF preamp suitable for use with an\n> HT and an Arrow? I always wish I had one when I listen for SO-50... it seems\n> like it ought to be inline with BNC connectors and battery powered to\n> maintain portability...\n\n> Thanks in advance!\n\n> Bryan Green KL7CN\n> Usually /W6 in CM98fn\n              408-836-7279\n\n\n\n_______________________________________________\nSent via [email protected]. Opinions expressed are those of the author.\nNot an AMSAT-NA member? Join now to support the amateur satellite program!\nSubscription settings: http://amsat.org/mailman/listinfo/amsat-bb\n\n",
    "attachments": []
}