Take my word also - We fought our 900mhz links for weeks until we moved 36inches away from the tower - even at 30inches you'll be kickin yerself in the arse.

For 2.4ghz - I've seen issues with anything less then 18inches of seperation from a tower.....

JohnnyO

On Thu, 2006-02-16 at 21:42 -0500, Tom DeReggi wrote:
I can tell you from experience, mounting it at 6 inches is not a good idea. 
We did that once, in a rush job, when the climbers were there and mounting 
hardware was not. Definate holes in coverage were identified after the fact.

The answer of how far from the tower, is also a factor of how big your tower 
is, and of what kind.

I recommend 18"-24". As for Rick's suggestion of 36", never tried it, so 
don't know, but I see no reason not to take his word for it.

Tom DeReggi
RapidDSL & Wireless, Inc
IntAirNet- Fixed Wireless Broadband


----- Original Message ----- 
From: "Rick Smith" <[EMAIL PROTECTED]>
To: "WISPA General List" <wireless@wispa.org>
Sent: Thursday, February 16, 2006 7:47 PM
Subject: Re: [WISPA] omni tower separation


>
> actually, at 900 mhz, 36" is preferred.
>
> On one tower, with trango, using an OD9-11 (11 dbi vert omni), I saw 8-10 
> db improvements in my customer connections that were NLOS when I moved the 
> antenna out from 24" to 36"....
>
>
> Marlon K. Schafer wrote:
>
>> I've always been taught that 18" is the minimum.
>> marlon
>>
>>     ----- Original Message -----
>>     *From:* Kurt Fankhauser <mailto:[EMAIL PROTECTED]>
>>     *To:* wireless@wispa.org <mailto:wireless@wispa.org>
>>     *Sent:* Thursday, February 16, 2006 10:12 AM
>>     *Subject:* [WISPA] omni tower separation
>>
>>     Is 6 inches enough separation with a 9db omni from a 25g tower?,
>>     I’ve done it with 12 before and I had no problems, just wondering
>>     what 6 would do.
>>
>>     Kurt Fankhauser
>>
>>     WAVELINC
>>
>>     114 S. Walnut St.
>>
>>     Bucyrus, OH 44820
>>
>>     419-562-6405
>>
>>     www.wavelinc.com <http://www.wavelinc.com>
>>
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