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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/FPE34CAEUAMB5HLS7J327ZWI3RJ7AUY6/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "[email protected]",
    "message_id_hash": "FPE34CAEUAMB5HLS7J327ZWI3RJ7AUY6",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/ZKPBAFTSAMPMXAI3HD3E52MVTYDPQFWB/?format=api",
    "sender": {
        "address": "vk3jed (a) gmail.com",
        "mailman_id": "e049fcabdd4648088cd7ce227ab7c655",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/e049fcabdd4648088cd7ce227ab7c655/emails/?format=api"
    },
    "sender_name": "Tony Langdon",
    "subject": "[amsat-bb] Re: Doppler Tuning Convention Question (summary)",
    "date": "2010-06-01T21:36:40Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/DRDSDNK73TQW2FVISDVSHKWTGWOVXAOW/?format=api",
    "children": [
        "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/55QHM2XKEC66IUYPH33PFUQGJDW4CQLC/?format=api"
    ],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "At 05:53 AM 6/2/2010, Michael Tondee wrote:\n\n>was fun. Not so if I came upon a station who was using manual tuning\n>while I was trying to let my computer do the work. I had to chase him\n>all over the passband and often lost stations completely that way. I\n>didn't fare much better with manual tuning. I guess I never really\n>learned it like some of the \"old hands\" have.\n\nI have had quite a bit of success with manual tuning on the SSB \nbirds.  It does require a lot of attention, especially on V/U and \nU/V.  On mode A, it's fairly straightforward, though adjusting the \nuplink on a radio that doesn't allow tuning on transmit is \ntricky!  One has to break their over into short segments of a few \nseconds long and make the uplink adjustment in steps. :)\n\nOn V/U, I was using an FT-847 at a hamfest, which was easier, \nprovided I focused on keeping up with the Doppler. :D\n\n>   When I can finally afford the V/U unit for my new Flex and get back on\n>linear birds it would be my hope that everyone who was in a base station\n>setup would be using full doppler control via computer. It baffles me\n>why anyone wouldn't, it makes life so much easier.\n\nIn my past, it was simply because I didn't have the right \nradio(s).  Now I have an FT-736R, and the first accessory I bought \nfor it was a CAT cable! :)  I can even dedicate a computer to the job.\n\n>   I do understand why portable stations like Tim would not be using full\n>doppler and I have no problem with that. I guess I just need to learn\n>how to manually tune in that situation.\n\nYep, it can be fiddly, but rewarding.\n\n>73,\n>Michael W4HIJ\n>On 6/1/2010 12:14 PM, John Belstner wrote:\n> > Thanks to everyone that responded.\n> > For those that have been on the list for years this thread may be \n> a dull rerun, but as a newbie, the information is useful.\n> >\n> > > From everyones responses, it appears that indeed there are \n> currently two conventions:\n> > 1. Full Doppler CAT tuning\n> > 2. Manually tuning the higher frequency while keeping the lower fixed\n> >\n> > I know that operators have been successfully using convention #2 \n> for years so this is my lack of sat operating experience talking \n> here, but just looking at the math it seems that it would be \n> difficult for two stations with different velocity vectors to the \n> satellite to communicate without at least one of them adjusting \n> both TX and RX.  I need to try this for myself I guess.\n> >\n> > One thing I did notice is that when operating Full Doppler CAT \n> tuning I was only able to successfully track other operators who \n> were doing the same.\n> >\n> > Cheers,\n> >\n> > 73, John W9EN\n> > DM13le\n> > [email protected]\n> >\n> >\n> > _______________________________________________\n> >\n>\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\n73 de VK3JED / VK3IRL\nhttp://vkradio.com\n\n",
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}