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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/7W7PJUJ3M44H72Z2B2JSPBLHY22JJGRH/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "[email protected]",
    "message_id_hash": "7W7PJUJ3M44H72Z2B2JSPBLHY22JJGRH",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/7W7PJUJ3M44H72Z2B2JSPBLHY22JJGRH/?format=api",
    "sender": {
        "address": "wandtosborne (a) gmail.com",
        "mailman_id": "e0efce0b56004e129f9360474b5a7a08",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/e0efce0b56004e129f9360474b5a7a08/emails/?format=api"
    },
    "sender_name": "Wendy and Terry Osborne",
    "subject": "[AMSAT-BB] Re: Need advice on circular polarized antennas",
    "date": "2023-12-26T03:13:54Z",
    "parent": null,
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Hi Joe,\n\nThe late Domenico I8CVS, designed a switcher that used horizontal and \nvertically polarised yagis to obtain circular polarization, both RHCP \nand LHCP as well as horizontal and vertical. It was described in the \nAMSAT Journal March/April 2007 and May/June 2007.\nI've put the articles in dropbox here:\nhttps://www.dropbox.com/scl/fo/ne4o6ham0xfwovfdz004a/h?rlkey=sl2jswt7mlf1fnwc9a9t8feuc&dl=0\n\nMany years ago I made up a couple of these for the FM Broadcast band and \ncan confirm that the switching system works fine.\n\nMerry Christmas and 73,\n\nTerry Osborne ZL2BAC\n\n\nOn 25/12/2023 6:08 am, Joseph Amato via AMSAT-BB wrote:\n> I’m looking for some advice on antennas for 2 m/70 cm satellite operation.  Presently, I have home-brew yagis for each band, horizontally polarized.  To eliminate fading due to satellite rotation, I want to replace these antennas with circularly polarized ones.  But the new antennas need to be relatively lightweight, because I have to lug them up on a ladder to mount them, and, well, I’m not as young as I used to be.  I have been considering the WiMo circular polarized antennas (#18010 and 18011), but would first like to hear from people who have experience with them.  I like to build things myself, but the WiMo design looks cleverer than anything I’ve been able to come up with so far.  Any advice?  Thanks!\n>\n> Joe K1MNY\n>\n> -----------------------------------------------------------\n>\n> Sent via AMSAT-BB(a)amsat.org. 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> Acceptable Use and Privacy Policies available at https://www.amsat.org/about-amsat/\n>\n> View archives of this mailing list at\n> https://mailman.amsat.org/hyperkitty/list/[email protected]\n> To unsubscribe send an email to amsat-bb-leave(a)amsat.org\n> Manage all of your AMSAT-NA mailing list preferences at https://mailman.amsat.org\n\n",
    "attachments": []
}