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Thread: NR22L mount help

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  1. #1
    Join Date
    Oct 2010
    Location
    So. California
    Posts
    200

    Question NR22L mount help

    Just got my Diamond NR22L in today. I currently have a wilson 5000 roof mount and the antenna is holding up pretty good, but i don't know how long it will last. So, i am on the hunt for a custom mount or a 5" diameter washer as a backing plate for the inside of the roof. I found these but i dont know if its the right way to do this.http://bellsouthpwp.net/b/r/breedlove1/page28.html

    i DO NOT use mag mounts, and want it on the roof. so a hitch mount is not an option.

    Give me an idea what i can do. thank you.

  2. #2
    Join Date
    Oct 2010
    Location
    So. California
    Posts
    200

    Default

    This is pretty much what i have now as a mount system.
    http://www.hamradio.com/detail.cfm?pid=H0-003634
    it has a 3" washer on the bottom goes through a hole in the roof and a plastic washer and rubber washer on the outside of the so239/UHF mount. I am thinking that the 3" underneath is not enough under wind loads?

  3. #3
    Join Date
    May 2001
    Location
    Roswell, NM DM73
    Posts
    2,590

    Default

    What you really want is an honest-to-john NMO. They're not compatible with the Diamond NMO. Properly installed, they do not leak, even with the antenna removed.

    They advertise the NR22L are a "very high gain" 2 meter antenna—6 some dB as I recall. Well... It isn't any better than a Larsen NMO2/70BK. The reason is, they dB rating is is actually dBi, not dBd as it should be. Not only that, read the fine print about the "reference" antenna.
    Alan Applegate, KBG
    [URL="http://www.k0bg.com"]http://www.k0bg.com[/URL]

  4. #4
    Join Date
    Oct 2010
    Location
    So. California
    Posts
    200

    Default

    Quote Originally Posted by K0BG View Post
    What you really want is an honest-to-john NMO. They're not compatible with the Diamond NMO. Properly installed, they do not leak, even with the antenna removed.

    They advertise the NR22L are a "very high gain" 2 meter antenna—6 some dB as I recall. Well... It isn't any better than a Larsen NMO2/70BK. The reason is, they dB rating is is actually dBi, not dBd as it should be. Not only that, read the fine print about the "reference" antenna.
    I know the debate between Larsen,Comtelco,Diamond,Comet etc etc..... i know.

    your off topic.

    I wanted a monoband for simplex and so far this aqntenna has outperformed all of my mobile antennas ON simplex within 5 mile tests. There is no way in the world a NMO will handle this antenna. i have done my research on DBD & DBI as-well as EIRP and ERP calculations.

    P.S I have 2 NMO mount's on the roof as well one is for 440, the other is for 220MHz.

  5. #5
    Join Date
    May 2001
    Location
    Roswell, NM DM73
    Posts
    2,590

    Default

    I my memory is correct, the antenna mounts on an SO239. An NMO is a much stronger mount, but you're probably correct, it needs more support. You're only recourse that I am aware of is the ballmount sold by Breedlove. It is ugly for sure, but on a adequate surface, will hold any current 2 meter antenna.
    Alan Applegate, KBG
    [URL="http://www.k0bg.com"]http://www.k0bg.com[/URL]

  6. #6

    Post

    Just got my Diamond NR22L in today. I currently have a Wilson 5000 roof mount and the antenna is holding up pretty good, but i don't know how long it will last.
    The Diamond NR22L is a 96 inch antenna.
    Reminds me of Hustler collinear mobile antennas that WB2WIK used in 1970s
    http://www.universal-radio.com/catal...antm/2210.html

    I have no information on your vehicle or this Wilson mount, BUT the NR22L will exert significant stress on that mount (due to its height) as you cruise down the highway.
    I am on the hunt for a custom mount or a 5" diameter washer as a backing plate for the inside of the roof.
    Common issue/problem for the radio installer with newer trucks, automobiles, and school buses (increasing usage of fiberglass and composite body parts). 2011 QRZ question.
    http://forums.qrz.com/archive/index.php/t-315204.html

    PCTel (MAXRAD, ANTENNA SPECIALISTS, BLUEWAVE, WISYS AND SPARCO WIRELESS brand names)
    sells a metal disk for installation under the antenna, to serve as a better attachment & ground plane for mobile antennas.
    http://www.antenna.com/apg_product_lines.cgi?id_num=12

    Part number: K332
    6-inch ground plane disk with .38" OD hole provides ground plane for fiberglass-bodied vehicles.
    http://www.antenna.com/apg_products.cgi?id_num=10999

    Usually used with 3/8 mounts, the hole can be enlarged for various mounts, as required (NMO, old A/S mount, SO-239)
    This item is usually "in stock" at better LMR dealers that do municipal & public safety radio installs.

    PCTEL, Inc.
    471 Brighton Drive
    Bloomingdale, IL 60108-3102
    Sales Toll Free: 1-800-323-9122
    Phone: 1-630-372-6800
    ==

    The Antenna Farm, Montana carries various mobile antenna parts
    http://www.theantennafarm.com/catalo...a395ad90688f4a
    The Antenna Farm
    PO Box 145
    Pray, MT 59065
    Last edited by W9GB; 04-11-2012 at 03:22 PM.

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