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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/NELHDZIVOZRD53RATSNAMDCKLOEVF54F/?format=api",
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    "message_id": "001001c8b3d8$fcc64820$0200a8c0@kc6uqh",
    "message_id_hash": "NELHDZIVOZRD53RATSNAMDCKLOEVF54F",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/4HND5PRAR25MKV2MLZ2ATTEHBVISJJGY/?format=api",
    "sender": {
        "address": "kc6uqh (a) cox.net",
        "mailman_id": "d9201820d18047e4a2772c86bda5e111",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/d9201820d18047e4a2772c86bda5e111/emails/?format=api"
    },
    "sender_name": "kc6uqh",
    "subject": "[amsat-bb] Re: bias tee circuits and components for 2.4\tGHzdownconverter",
    "date": "2008-05-12T02:36:31Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/4HND5PRAR25MKV2MLZ2ATTEHBVISJJGY/?format=api",
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Michael,\nAnything over 0.5 uH should work well, suggest you use 1.5 feet of # 28 to \n#36 enameled wire from an old transformer on a 1/2 watt carbon resistor 10K \nor larger. Put some of your Wife's fingernail polish on it to hold the wire \nin place. A small flame will burn the enamel off the ends of the wire and \nclean the soot of with a pen knife or sandpaper,  wrap and solder the ends \nof the wire to the resistor leads. Use a quality small ceramic capacitor 220 \npF to 1000 pf as a blocking capacitor, keep leads very short.\n73,\nArt, KC6UQH\n\n----- Original Message ----- \nFrom: \"Michael Tondee\" <[email protected]>\nTo: \"amsat-bb\" <[email protected]>\nSent: Sunday, May 11, 2008 10:01 AM\nSubject: [amsat-bb] bias tee circuits and components for 2.4 \nGHzdownconverter\n\n\n>I have a  Pacific Monolithics surplus MMDS downconverter here that I would \n>like to get up and running on S-band. It has an 122 MHz IF and I want to \n>whip up a bias -tee to power it. I've looked at the circuits in the \n>Satellite Experimeters handbook and my problem is finding an rf choke of \n>the right value that is readily available in my area. Shouldn't I be able \n>to just wind  something with an air core out of magnet wire or something \n>similar that will do the trick? According to the circuit I have I'd need \n>about a 1.5 uh choke for 146 Mhz and it isn't critical so that's probably \n>close enough for my downconverters IF frequency. I hate to spend shipping \n>charges to get one little choke or ferrite core for winding a choke on \n>here. Most places have a minimum order and I don't need anything else at \n>this time. I'd also welcome links to any other circuits that might be out \n>there.\n> Thanks,\n> Michael, W4HIJ\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": []
}