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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/PX5STOW73K6WOS4MLQB2OUXTD4LQTFG4/",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/",
    "message_id": "20070823203832.UKME15789.atlmtaow01.cingularme.com@COM",
    "message_id_hash": "PX5STOW73K6WOS4MLQB2OUXTD4LQTFG4",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/PX5STOW73K6WOS4MLQB2OUXTD4LQTFG4/",
    "sender": {
        "address": "kk5do (a) amsat.org",
        "mailman_id": null,
        "emails": null
    },
    "sender_name": "Bruce",
    "subject": "[amsat-bb] Re: A051",
    "date": "2007-08-23T20:38:00Z",
    "parent": null,
    "children": [
        "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/AZOTF7PNBI67QMVQRGRNG62WYFMRB7CW/"
    ],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "this method of correcting for doppler is an incorrect practice. It might be fine if you and your buddy are the only two on the satellite.  also, notice you say 'you perfer', not the correct method. As doppler affects both frequencies, they should both be corrected using computer control. In the absence of computer control, the higher of the two frequencies is always corrected because doppler affects the higher frequency more. It does not matter if this is your tx or rx, it is always the higher frequency.\n\n73...bruce\n\n-----Original Message-----\n\nFrom:  \"i8cvs\" <[email protected]>\nSubj:  [amsat-bb] Re: A051\nDate:  Thu Aug 23, 2007 3:04 pm\nSize:  1K\nTo:  \"Scott Wilson\" <[email protected]>, <[email protected]>,        \"AMSAT-BB\" <[email protected]>\n\n----- Original Message -----\nFrom: \"Scott Wilson\" <[email protected]>\nTo: <[email protected]>; <[email protected]>\nSent: Thursday, August 23, 2007 5:38 PM\nSubject: [amsat-bb] Re: A051\n\n> For those more experienced, I do have a couple of questions:\n>\n> When operating an inverting linear, do you generally transmit on USB and\n> listen LSB or visa versa?\n\nHi Scott, NW2S\n\nWe transmit LSB and we receive USB because doing so many other radio\nhams dedicated to tropo traffic in VHF/UHF can hear us from the satellite\nby chance in 2 meters and 70 cm where they normally operate in USB for\ntropo.\n\n> When operating linear, what's the accepted approach to doppler correction?\n> It seems that you would be able to transmit without any correction, but\n> that your receive would vary a lot more - or perhaps again, visa versa?\n\nThere are various preferences but since OSCAR-6 I prefere to keep constant\nthe frequency of my return SSB signal while manually correcting the TX\nfrequency to keep my voice constantly clear while speaking.\nIf the operator in contact with me do the same then our QSO start and end\non the same frequency during the whole orbit.\nI prefere to use separate RX and TX and in my case they are nothing special\nvery old and mostly homebrewed equipments.\n\n\n",
    "attachments": []
}