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/PIMGFLIAFRQFBRCFTFASE657MRJERUI4/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "CANq+eyX38cxaj6wfKxiriUZ7gi92xpR=SFwt9uz_kbTg05we6w@mail.gmail.com",
    "message_id_hash": "PIMGFLIAFRQFBRCFTFASE657MRJERUI4",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/S7WU3SRI65LBIOBWGV6ASH7U4WTJ4QAJ/?format=api",
    "sender": {
        "address": "dave (a) druidnetworks.com",
        "mailman_id": "3b01b396750a47f287ea0c65babd40ea",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/3b01b396750a47f287ea0c65babd40ea/emails/?format=api"
    },
    "sender_name": "David Swanson",
    "subject": "Re: [amsat-bb] WSJT-X FT8 QSO confirmed between W2JAZ and W5RKN on\tFO-29",
    "date": "2017-10-17T18:53:43Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/DGY7XPVKUVOBH2WXI4HLOQ32ACFSYHW6/?format=api",
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "I appreciate the apology Ron. I'll consider this event water under the\nbridge.\n\nThanks.\n\n-Dave, KG5CCI\n\nOn Tue, Oct 17, 2017 at 12:28 PM, Ronald G. Parsons <[email protected]> wrote:\n\n> First of all, let me apologize for any disruption I may have caused by my\n> tests (experiment, interference, ...).\n>\n> Last evening around 0120Z  I was indeed transmitting MSK144 on a downlink\n> frequency of 435.878 (at the satellite) on a pass of FO-29 with a 4 degree\n> max elevation at my location with the satellite over the Atlantic. The pass\n> was monitored by a station in Virginia as a test of using MSK144 at low\n> angles. I deliberately transmitted near the upper end of the passband. I\n> continuously monitored the passband on my panadapter and there were quite a\n> few QSOs on that pass, all well below my frequency.\n>\n> I also did a test around 0300Z as shown in your link (\n> http://druidnetworks.com/w5rkn-msk144-fo29.jpg)\n>\n> If I interfered with any of those QSOs, I am sorry. The test confirmed\n> that MSK144 could be decoded at weak signal levels even in the face of\n> Doppler shift.\n>\n> As far as the AO-7 incident you mention below, I did on a couple occasions\n> inadvertently cause a mode switch. I was certainly not the only station to\n> cause this action. Because I knew how that action could accidently be\n> caused, I did make a couple posts to AMSAT-BB to help others avoid this\n> mistake.\n>\n> Again, I am sorry for any problems this may have caused.\n>\n> Ron W5RKN\n>\n> *From:* David Swanson\n> *Sent:* Monday, October 16, 2017 11:03 PM\n> *To:* Ronald G. Parsons\n> *Cc:* AMSAT-BB\n> *Subject:* Re: [amsat-bb] WSJT-X FT8 QSO confirmed between W2JAZ and\n> W5RKN on FO-29\n>\n> On the FO29 pass at 0155z this evening, I noticed a very hard time getting\n> into the transponder. The pass was nearly overhead, and the 3w-4w that is\n> normally sufficient was barely cutting it. I also noticed it was 'up and\n> down' alot, whereas some moments it was easy to get in, then it would be\n> nearly impossible. There were also pockets of 'noise' all over the\n> transponder, that sounded somewhat digital, but I just couldn't place them.\n> I found W5PFG in the passband (who was portable in a rare grid in western\n> Texas) and he commented on the difficulty of working an otherwise easier\n> bird tonight as well. I checked the screen, and no other birds were\n> obviously in range, so I started scanning around the passband to see what I\n> could hear. Up around 435.870 I found (or rather heard) what I was looking\n> for. I fired up my recorder and captured this:\n>\n> https://drive.google.com/open?id=0B8W_KstbAsD_VF9NbGR3ZXlicUE\n>\n> For those not familiar, that is the telltale sound of MSK144. I work a\n> fair amount of Meteor Scatter in addition to operating satellites, and the\n> noise is unmistakable. Since my shack PC has wsjt-x installed, I quickly\n> fired it up and went to the msk144 mode and after some quick tweaking\n> started decoding the signal. This is a screenshot of what I saw:\n>\n> http://druidnetworks.com/w5rkn-msk144-fo29.jpg\n>\n> This signal continued for at least 8 minutes (that I recorded) in a 5\n> second T/R cycle while FO29 was passing high over North America. Every 5\n> second the digital signal would get transmitted, and all other SSB qsos\n> would start to fail. You might call this an experiment, but I call it\n> intentional QRM.\n>\n> *For the record* You are not the first person to play with wsjt-x modes on\n> the linear satellites. Some months ago during the late night hours on the\n> XW's and FO29 when the footprint was primarily over the desert southwest\n> and south pacific, I to \"experimented\" with FT8 and MSK144. I purposely ran\n> my transmitted signal thru over 100ft of low grade coax to attenuate my\n> uplink to ~1.5w ERP. I made sure the entire transponder was empty before\n> starting, announcing myself, then started the transmission. I decoded\n> myself successfully, said \"Well that was dumb\" and never did it again. I\n> purposely didn't announce what I had done to the world because I knew\n> someone would think they were being cool too, and would fire up a 2700hz\n> wide 50% duty cycle mode on a high US pass and QRM people trying to make\n> QSOs out of existence, because said individual would lack even basic\n> situational awareness and courtesy to others. What is extra hilarious about\n> the fact that it is you being the responsible party for destroying a pass,\n> is your constant whining to this mailing list about people using too much\n> power on AO-7, when you're one of the worst offenders. On July 16th this\n> summer, I was roving in EM35 and you called me on the 2155z pass of AO7,\n> and you got the first 3 letters of your callsign out before you killed the\n> bird. I know it was you, because I had already made 3 QSOs right at my AOS\n> with other stations using a reasonable amount of power, and as soon as you\n> key'd up the whole bird started FMing and croaked before you even finished\n> your call. You didn't get that grid that day, and after the stunt you\n> pulled this evening - you won't be getting any grids from me in the future\n> either.\n>\n> -Dave, KG5CCI\n>\n>\n",
    "attachments": []
}