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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/WQBQFK4R3G76AK564D3MCL7X47YFD5SK/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "CO2PR01MB207100766642CC82ACB1AA3598900@CO2PR01MB2071.prod.exchangelabs.com",
    "message_id_hash": "WQBQFK4R3G76AK564D3MCL7X47YFD5SK",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/2ETFYEDD2OUFXABCROPA5MVTHVFWF3SR/?format=api",
    "sender": {
        "address": "va7kbm (a) outlook.com",
        "mailman_id": null,
        "emails": null
    },
    "sender_name": "Ken M",
    "subject": "Re: [amsat-bb] Recording TX & RX from one or two radios?",
    "date": "2018-05-18T01:46:17Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/4XUYWJZWGB245AQDPNIR6GXCOCEW7SB3/?format=api",
    "children": [
        "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/TYHOQP34F7WYMGXVD5HRTXMOZDMJLXFE/?format=api"
    ],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Hi Patrick,\r\n\r\nOf course you are right about full duplex recording (kicking myself for not thinking of that!).\r\n\r\nFor HF and all other half-duplex work, especially QRP from the field I’m looking for a wired solution so I don’t record background noise (and I use a headset). Anyway, that’s not a satellite application so I’ll take the question elsewhere.\r\n\r\nThanks!\r\n73 Ken VA7KBM\r\n\r\nOn May 17, 2018, at 5:21 PM, Patrick STODDARD (WD9EWK/VA7EWK) <[email protected]<mailto:[email protected]>> wrote:\r\n\r\nKen,\r\n\r\nIt really is simple, if you are working full-duplex. Just\r\nrecord the RX audio. You get the full exchanges, since\r\nyou will hear yourself and the other stations. A splitter\r\non the speaker of the radio receiving the downlink can feed\r\naudio to a recorder and headphones/earphone/earbuds you are\r\nusing to hear the downlink.\r\n\r\nFor working HF or working satellites half-duplex, I just use\r\na recorder that picks up the radio's speaker audio and my\r\nvoice with its microphone. Then I get both sides of those\r\nQSOs.\r\n\r\n73!\r\n\r\n\r\n\r\n\r\n\r\n\r\nPatrick WD9EWK/VA7EWK\r\nhttp://www.wd9ewk.net/\r\nTwitter: @WD9EWK or http://twitter.com/WD9EWK\r\n\r\n\r\nOn Thursday, May 17, 2018, Ken M <[email protected]<mailto:[email protected]>> wrote:\r\nHello AMSATers,\r\n\r\nI'm looking to record both TX and RX audio to a digital recorder, either\r\nat the QTH or in the field (but mainly in the field), in either of two\r\ncommon scenarios:\r\n\r\n1. TX from one radio, and RX from a different radio (as in satellite use\r\nwith one radio for uplink and one for downlink).\r\n\r\n2. TX/RX from the same radio (as in a full-duplex radio for FM\r\nsatellites, or for non-satellite use).\r\n\r\nI'm wondering if you know of a device (or a published circuit design)\r\nthat will allow TX/RX recording while isolating the radios from each\r\nother and/or a radio's TX from it's RX, while linked to the same\r\nrecorder? I have to believe this is a well-solved problem within the\r\nsatellite radio community but I haven't found too many ideas for field\r\nuse. This is seems to be an easier problem to solve at the QTH if\r\nrecording to computer, with various sound interfaces (Signalink, etc.)\r\nso my main interest is in field use with a digital recorder so I can\r\nrecord my QSO's while juggling two radios plus antenna, etc. The easy\r\nalternative is just to record the RX side, which is easy, and works for\r\nlogging but doesn't give you the full exchange.\r\n\r\nThanks & 73!\r\nKen VA7KBM\r\n\r\n\r\n",
    "attachments": []
}