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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
    2,699

    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
    http://www.k0bg.com

  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
    2,699

    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
    http://www.k0bg.com

  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.
    Nullius in verba

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