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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/3E6HZTPGM674W7SG7FMZJERTT2KTWICX/",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/",
    "message_id": "CAJUhCTPnJ2iSap4ti2KPFn-RHkVx7gFw6FxNeU6KQ6Kudkh_Lw@mail.gmail.com",
    "message_id_hash": "3E6HZTPGM674W7SG7FMZJERTT2KTWICX",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/QKRUJBYY4DBVAOLSPTZ7SK7MFGEAT7TG/",
    "sender": {
        "address": "normanlizeth (a) gmail.com",
        "mailman_id": null,
        "emails": null
    },
    "sender_name": "Norm n3ykf",
    "subject": "Re: [amsat-bb] Exciting Coax",
    "date": "2018-01-23T03:02:48Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/QKRUJBYY4DBVAOLSPTZ7SK7MFGEAT7TG/",
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Mark,\n\nBelden 9913F7 with \"clamp\" (hand assembled) N connectors would work\nfor your feedline. If you go this route, MAKE SURE THAT THE CONNECTOR\nHAS THE PROPER CENTER PIN FOR 'F7.\n\nRG-142 and hand assembled BNC's would work for the gear interconnect jumpers.\n\nLook on the bay for real Amp connectors. They are cheaper here than at\nan online vendor. Finding the right connectors at a hamfest can be\niffy.\n\nRG-142 can be had cheaply on the bay as well.\n\nHigher freqs are best handled by hardline. Small pieces are available\nand new, OEM (surplus) connectors are available at reasonable cost.\n\nClosely following the spec sheet for the connector that you're\nassembling is critical. I use a copy of the MIL348 standard (for free,\navailable online) for the dimensions. There's only one that matters,\nreally for us. How far is the pin recessed. Get that wrong and the pin\nwill \"tulip\" the prongs of the female or not make proper contact,\ntrashing the connectors, your work and introducing a point of failure.\nAn el cheapo pair of digital calipers (use the depth gauge on the\ntongue end) will make short work of this.\n\nRazor blade and sharp scissors make short work of cable prep. A\ncassette stripper can help, but I have found is not a one size fits\nall fix.\n\nIf the sickness bites, a crimper set is a good investment. Making\ncustom cables for portable gear is a snap. I usually carry a few clamp\nconnectors in case of failure in the field.\n\nNorm n3ykf\n\nOn Mon, Jan 22, 2018 at 9:03 PM, anderson58625 <[email protected]> wrote:\n> Reading the subject line, I may have somehow mixed sarcasm with a potential\n> pun (eye of the beholder!) <grin>.  Sorry for that.\n>\n>\n>\n> I seek to avoid investing in a set of cable producing hardware (or assembled\n> cables) which I will regret later.  I am hoping to get some guidance\n> regarding coax for:\n>\n> 1)      IF patch between equipment (male-male BNC's)\n>\n> 2)      2m feedline (N-connectors) (<50')\n>\n> 3)      70cm feedline (N-connectors) (<50')\n>\n> 4)       A later potential for feedline carrying microwave frequencies\n> (>1GHz)\n>\n>\n>\n> The frequency & loss-rate charts for coax are informative, but I'm not sure\n> I'm seeing which connectors will fit what cable brand/types.  With the\n> variables of loss, dimensions, flexibility, and potential proprietary\n> crimping systems, etc., I don't have enough experience or information to\n> confidently make an online materials order.  Things were much easier down\n> here with just HF frequencies, RG-213, and good quality (weather protected)\n> PL-259's! <grin>\n>\n>\n>\n> For IF patch cables, I figure these are conveying HF so the cable type/loss\n> at 1-3' isn't very important.  But, there is also shielding:  A\n> consideration?\n>\n> .       Any thoughts on IF cables?\n>\n> .       Plus, I've never attached a BNC to a cable.  Easy?  Avoid it?\n>\n> .       Plan on a new crimper/die?\n>\n> .       Or, if premade would be cheaper (just a few IF patch cables), any\n> quality sources to recommend?\n>\n>\n>\n> For the 2m & 70cm feedlines, I know flexibility may be a consideration on\n> rotating/elevating masts.  Of course, I'm sure a rigid feedline may be\n> superior elsewhere, but I am not at that point yet.  Still, advice on that\n> subject is gratefully appreciated.  I need to provide good questions to hope\n> for good answers, so what feedline you would recommend for:\n>\n> .       Reasonable flexibility/portability\n>\n> .       2m-23cm\n>\n> .       Modest power\n>\n> .       <50'\n>\n> .       For use with n-connectors\n>\n>\n>\n> The benefit of you knowledge and experience is much appreciated.\n>\n>\n>\n> 73\n>\n>\n>\n> Mark W9AT\n>\n>\n>\n>\n>\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",
    "attachments": []
}