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/GUOIREBJKFKS5VQNJVCNM2C4NNAR3F4X/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "002101d182f8$8b020240$a10606c0$@net",
    "message_id_hash": "GUOIREBJKFKS5VQNJVCNM2C4NNAR3F4X",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/GUOIREBJKFKS5VQNJVCNM2C4NNAR3F4X/?format=api",
    "sender": {
        "address": "tjschuessler (a) verizon.net",
        "mailman_id": "e00b615eeb1940c790a22f139add6462",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/e00b615eeb1940c790a22f139add6462/emails/?format=api"
    },
    "sender_name": "Tom Schuessler",
    "subject": "[amsat-bb] Coax jumper lenths -- Math help please.",
    "date": "2016-03-20T22:33:35Z",
    "parent": null,
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Hello all,\n\nI have a question for those of you much more experienced than I.  It relates\nto a satellite antenna installation I am working to accomplish this Spring.\n\nI have two cross polarity yagis, one  for 145 and the other for 435.  Each\nof these antennas has two separate feeds for the H and V polarities.  The\ntwo meter antenna has two feeds, both at about 14 inches from the end of the\nantenna boom.  Jumpers from the connectors will be secured to the very end\nof the boom and trail off to main feed line connectors below the AZ rotor.\nThe mount point of this boom is 5' 2\" from the end of the boom with the\ndriven element.  The 70CM yagi is an end mount but the two connection points\nare offset from each other.  One is 17 inches from the back end of the boom\nand the other is 24.  Coax jumpers will again be attached to the boom and\nwill trail off to connections below my AZ rotor.  \n\nI will be using two separate rotors, (A G5400 or G5500 is not in the\npaycheck right now), an elevation rotor with a 4'2\" boom to mount the two\nantennas and an azimuth rotor which will have a probably 2' maximum mast\nfrom there to the EL rotor mount.  All this will mount to an only half\nextended push-up-pole, which is ground mounted but attached to the apex of\nmy single story house.  Total height off the ground will probably be 20 feet\nwhen all is said and done.  I will be running 4 runs of not that flexible\n9913 up to just below the AZ rotor and from there want to attach jumpers of\nmore flexible LMR 400 Flex to make the runs out to the antennas mentioned\nabove.\n\nMy question is for your more math savvy or just plain experienced folks, is\nhow long should the jumpers be in total for each antenna to allow for a 360\ndegree rotation and 180 degree elevation shift based on the parameters I\ndescribed above???  I was guessing 10 to 11 foot jumpers from antennas to\nthe barrel connectors just below the AZ rotor but wanted to make sure that\nthat was long enough, or if they could be shorter, say maybe 9 feet.  Of\ncourse the 70 CM antenna with it's one feed point 7 inches further up the\nantenna would need to be that much longer I guess.  I also understand that\nthe 2 meter swing will be greater because of the more center mount rather\nthan the end mount on the 70 cm antenna.\n\nClear as mud???\n\nThis is new territory for me so I am wanting to make sure that all the\ndecisions are right before I need to do things over, and over, and over to\nget it right.  I can take some pictures if someone needs to see what I\ndescribed.  Email me and I will give you my cell if you would rather talk or\nask questions verbally.\n\nThank you to the group in advance for your help and thoughts.\n\nTom Schuessler, N5HYP\[email protected]\n\n\n",
    "attachments": []
}