NR22L mount help

[K6DEA]

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.

[K6DEA]

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?

[K0BG]

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.

[K6DEA]

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.

[K0BG]

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.

[W9GB]

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
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The Antenna Farm, Montana carries various mobile antenna parts
http://www.theantennafarm.com/catalo...a395ad90688f4a
The Antenna Farm
PO Box 145
Pray, MT 59065