Chris:

The UHF mount is the pl259/SO238 type of mount that has the usual coax 
connection.

The NMO mount is stronger, and has a much tighter connection, in my opinion. 
It's therefore less succeptable to moisture.


I went through the same problem when I was getting my motor home set-up for 
2-meters and 440 going, and the NMO mount was suggested over the UHF one 
hands down.

I don't think it's much more expensive than the UHF mount either.

Hope this helps.

If you want a good explanation, call the folks at R and L Electronics.

They were the first ones who patiently explained the difference to me.

73 from Tom Behler:  Kb8TyJ

----- Original Message ----- 
From: "Christopher Moore" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Saturday, November 15, 2008 4:05 PM
Subject: question about mobile antena mounts


>    Hello,
> I'm looking for a 6m / 2m / 440 mobile antenna.  I found a Diamond 
> cr427-B.
> There are two versions, a uhf mount and an NMO mount.
> What are the differences?  What is a NMO mount?
> I suppose I could call someone at AES or HRO to get an explanation but
> thought that our knowledgeable list members would be a great start.
>
> tnx and 73
> Chris w1gm
>