Email Detail

HTTP 200 OK
Allow: GET, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/Y4TQYU4ZVCMEK2S5OYTIKCHVIAU3NYI5/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "[email protected]",
    "message_id_hash": "Y4TQYU4ZVCMEK2S5OYTIKCHVIAU3NYI5",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/4CGZYKRAUZHRSCX7M72XI7DPD3UDASWQ/?format=api",
    "sender": {
        "address": "yono_adisoemarta (a) yahoo.com",
        "mailman_id": "0f8c5fb66117469a95e91d6a2563b698",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/0f8c5fb66117469a95e91d6a2563b698/emails/?format=api"
    },
    "sender_name": "Suryono Adisoemarta",
    "subject": "Re: [amsat-bb] AO-92 L/V with an Alinco DJ-G7T full-duplex (long)",
    "date": "2019-03-06T02:23:08Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/4CGZYKRAUZHRSCX7M72XI7DPD3UDASWQ/?format=api",
    "children": [
        "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/7AXWA7RIAKDSJVRPCNUAUCX6ZFK76SES/?format=api"
    ],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "\nWhich Yagi 1.2 GHz that you use ?\n\n73 de Yono YD0NXX \n\n\n\nSent from my mobile device\n\n> On Mar 6, 2019, at 6:23 AM, Patrick STODDARD (WD9EWK/VA7EWK) <[email protected]> wrote:\n> \n> Hi!\n> \n> I have written a bit about the Alinco DJ-G7T and using it on satellites on\n> this list over the years. I wrote about using it on AO-92 in both U/V and\n> L/V modes last year:\n> \n> http://amsat.org/pipermail/amsat-bb/2018-February/066923.html\n> \n> Until the past weekend, I had always worked AO-92 L/V with two radios -\n> transmitting on 1.2 GHz from the DJ-G7T, and receiving the 2m downlink\n> with my Kenwood TH-D74 (which can also record the downlink). I have used a\n> couple of different antennas, but have wondered if the DJ-G7T could work\n> the L/V mode full-duplex like it can work U/V (with some caveats) full-\n> duplex. Now, I have tried this for myself, and will ask the question...\n> \n> Can the Alinco DJ-G7T work AO-92's L/V mode full-duplex? Yes.\n> \n> Before the past week or so, I was aware of the triplexers offered by\n> Diamond that included a 1.2 GHz port. Those are noticeably larger than the\n> diplexers from Diamond and other manufacturers, and a larger price tag as\n> well. I saw something online that mentioned the Diamond MX-37 diplexer,\n> having one port for HF through 470 MHz, and the other port for 800-1300\n> MHz. Physically, the MX-37 diplexer is similarly sized with other\n> diplexers, and it has two coax pigtails for those two ports - coax with an\n> N connector for the 1.2 GHz port, and a PL-259 on the other pigtail for\n> use with the lower frequencies. The common port is an N socket. After I\n> received this diplexer in the mail, I was ready to fit it into my portable\n> AO-92 L/V station.\n> \n> I have been using a 10-element 1.2 GHz Yagi for AO-92 L/V in the past few\n> weeks, and I tie that to the PVC handle of my Elk log periodic. I decided\n> to tie the MX-37 diplexer to the PVC handle behind the antennas. This\n> allowed me to connect the 1.2 GHz side of the diplexer directly to the coax\n> pigtail from the Yagi's driven element. I used a 3-foot/1m length of coax\n> from the PL-259 connector on the other side of the diplexer to the Elk's\n> coax feedpoint. From the common port on the diplexer, I ran another\n> 3-foot/1m length of coax to the DJ-G7T.\n> \n> To keep from causing audio feedback while transmitting, an earpiece or\n> something like that needs to be plugged into the DJ-G7T. The DJ-G7T uses\n> a single 4-conductor 3.5mm jack for speaker/mics. To split out the speaker\n> jack so I can use an earpiece and an audio recorder, an adapter is needed.\n> I use Alinco's EDS-10 adapter, which provides a 3.5mm speaker jack and a\n> 2.5mm microphone jack (don't need anything in the smaller jack for this).\n> Alinco also has an EDS-14 adapter, which looks very similar to Yaesu's\n> CT-91 adapter used with a few HTs (VX-6R and VX-7R, among others) - where\n> the two jacks are on short pigtails from the 3.5mm plug. The Yaesu CT-91\n> adapter works fine with the DJ-G7T.\n> \n> The DJ-G7T only allows transmitting from VFO A, the upper VFO on the HT's\n> display. I put the 1267 MHz uplink frequency in this VFO, along with\n> encoding the 67.0 Hz CTCSS tone. I use 5 kHz tuning steps on this radio for\n> 1.2 GHz. I set the volume for this VFO to 0, and tightened the squelch to\n> the maximum. For the lower VFO (B), I put 145.880 MHz with the squelch left\n> wide open, and adjusted the volume to a reasonable level using my earpiece.\n> \n> I used this setup for 3 passes over the weekend. The antennas were a little\n> heavier with the diplexer on the handle, but I could still control them\n> with one hand. I held the DJ-G7T, along with the splitter and patch cable\n> to my audio recorder. I could still adjust the knob for the transmit VFO,\n> and made some contacts on those 3 passes. It was fun to be able to use just\n> one HT for AO-92 L/V.\n> \n> There are some tradeoffs when going from a two-HT setup for AO-92 L/V to\n> just the DJ-G7T. The 2m receiver isn't as good as with other HTs, certainly\n> not as good as the TH-D74 I have normally used when working L/V. I heard\n> some other signals mixing with the AO-92 downlink on parts of a couple of\n> passes. Of course, the DJ-G7T does not come with a built-in recorder like\n> the TH-D74. There may have been a little less power going to the 1.2 GHz\n> Yagi, passing through the coax to the diplexer's common port and then out\n> from the diplexer to the Yagi, but I still got through. During one of the\n> L/V passes, I was still able to get through AO-92 transmitting at low power\n> from the DJ-G7T (rated at 300mW for 1.2 GHz).\n> \n> I posted some pictures of this setup on the QRZ satellite forum, in a long-\n> running thread \"Where's AO-92???\", starting at:\n> \n> https://forums.qrz.com/index.php?threads/wheres-ao\n> -92.614536/page-34#post-4986044\n> \n> Audio from my recorder on the 3 passes I worked last weekend with this\n> setup is in the \"Satellite_Audio-2019\" folder in my Dropbox space:\n> \n> http://dropbox.wd9ewk.net/\n> \n> The direct link for the pass I worked Saturday evening, where the recording\n> started at 0537 UTC Sunday (3 March), is:\n> \n> https://www.dropbox\n> .com/sh/v3byggtuqw33fkk/AAA_gyTts4RpjT3jZa8GJI5ha/Satellite_Audio-2019/20190303-0537UTC-AO92-DM43bl.mp3?\n> dl=0\n> \n> Audio from the 1709 UTC pass Sunday morning is at:\n> \n> https://www.dropbox.com/sh/v3byggtuqw33fkk/AACeV6R0Bjh-RRPXTrNpblAca\n> /Satellite_Audio-2019/20190303-1709UTC-AO92-DM43bl.mp3?dl=0\n> \n> and the late-morning pass at 1843 UTC Sunday:\n> \n> https://www.dropbox.com/sh/v3byggtuqw33fkk/AADmbAfFYtHARDfULAR\n> _J5eSa/Satellite_Audio-2019/20190303-1843UTC-AO92-DM43bl.mp3?dl=0\n> \n> It is nice to see that the DJ-G7T is capable of L/V full-duplex operation,\n> just as it is capable of U/V full-duplex operation, in line with Alinco's\n> advertising for the radio - with some caveats. I can now alternate between\n> a one-radio setup and a two-radio setup for AO-92 L/V. More fun with\n> radios... :-)\n> \n> 73!\n> \n> \n> \n> \n> Patrick WD9EWK/VA7EWK\n> http://www.wd9ewk.net/\n> Twitter: @WD9EWK or http://twitter.com/WD9EWK\n> _______________________________________________\n> Sent via [email protected]. AMSAT-NA makes this open forum available\n> to all interested persons worldwide without requiring membership. Opinions expressed\n> are solely those of the author, and do not reflect the official views of AMSAT-NA.\n> Not an AMSAT-NA member? Join now to support the amateur satellite program!\n> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb\n\n",
    "attachments": []
}