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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/WS6BPVZQT46JLTR66YN3JEIBRUAPRQZX/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "[email protected]",
    "message_id_hash": "WS6BPVZQT46JLTR66YN3JEIBRUAPRQZX",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/UDVGACZ6NBL4ASB3PDZK42NRVDM2JVKV/?format=api",
    "sender": {
        "address": "dquagliana (a) aol.com",
        "mailman_id": "75c9beaffd1d4a0cb28236652097bbb0",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/75c9beaffd1d4a0cb28236652097bbb0/emails/?format=api"
    },
    "sender_name": "Douglas Quagliana",
    "subject": "[amsat-bb] Re: Hamtronics receive converters",
    "date": "2012-01-21T04:05:27Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/UDVGACZ6NBL4ASB3PDZK42NRVDM2JVKV/?format=api",
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "\n \nHi John,\n\nHamtronics previously offered a UHF receive converter.   It was available as a kit and was a mix\nof through-hole components and surface mount.  This was the first surface mount kit that I built.\nThere were two options for the crystals, so that it would convert either 435.0 MHz or 435.5 MHz \ndown to 28.0 MHz depending on which crystal was installed in the circuit board.  One note\nof caution: If you want to use it for AO-27 ( at 436.8 MHz ) then verify that your receiver will \ntune past 29.7 MHz up to 29.8 MHz, or get the crystal to convert 435.5 MHz down to 28.0 MHz.\nSome ten meter receivers only tune up to 29.7 MHz.  Also, tuning up some of the coils required\na special tuning tool from Hamtronics. \n\nWe measured my receive converter at the 2010 International EME Conference in Dallas last year.\nMy receive converter had about a 6.3 dB noise figure and 15.1 db gain.  \n\nIn my experience, it always required a low noise preamp in order to be useful for receiving \nsatellite signals. Whether the preamp requirement was due to the design or whether it was \nbecause this kit was the first surface mount kit that I ever built was something that I \nnever determined. :-)  The preamp that I used in front of it measured 1.55 dB noise figure\nwith 14.3 db gain.  The combination of low noise preamp and downconverter worked very \nwell with an HR2600 on AO-27 and AO-51.\n\nA few more details are available at:\n\nhttp://www.amsat.org/amsat-new/information/faqs/mobileQRP.php\n\nTLDR: Yes, they used to offer it. If you see one for a couple bucks at a hamfest, grab it \nand use it with a low noise preamp.\n\n73,\nDouglas KA2UPW/5\n\n\n-----Original Message-----\nFrom: John Geiger <[email protected]>\nTo: AMSAT-BB <[email protected]>\nSent: Fri, Jan 20, 2012 10:41 am\nSubject: [amsat-bb] Hamtronics receive converters\n\n\nDoes anyone know if Hamstronics has made a UHF receive converter?  The\ncurrently make one for 2m, but I would like one to use for FO29, if\npossible.\n\n73s John AA5JG\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 \n",
    "attachments": []
}