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Re: [TowerTalk] Funniest thing I've seen in weeks

To: Jim Smith <jimsmith@shaw.ca>, Towertalk@contesting.com
Subject: Re: [TowerTalk] Funniest thing I've seen in weeks
From: Bill Aycock <baycock@direcway.com>
Date: Fri, 30 Jul 2004 06:21:09 -0500
List-post: <mailto:towertalk@contesting.com>

Enjoy your lunch- this appears to be a good occasion for fruit, as in "Apples and Oranges".He was referring to Gain, while you argued about S/N. There IS a difference.
Bill


At 01:46 AM 7/30/2004 -0700, you wrote:

Hi Tom,

First of all, I'm very nervous about dipping my toe into the pool where the big boys swim, but here goes.

First of all, the MANY that you refer to has now been decremented by 1.
Thank you.

I'm trying to understand your statement below.
If the received noise is uniformly distributed in azimuth I would think that additional gain, presuming that it comes from a narrower azimuthal pattern, would increase the SNR of the desired signal.


If there is a lot of noise from one direction and the increased directivity is such that there is now a null in the direction of the big noise then the SNR of the desired signal would increase a lot.

Am I on the right track here or totally out to lunch?

73 de Jim Smith VE7FO

Tom Rauch wrote:

This is actually pretty important, because MANY people think
7dB of additional antenna gain improves the receiving and
transmitting 7dB. The actual receiving change can be
anything from zero to dozens of dB. If for example you have
a 15 meter Yagi with 3dB of feedline loss and improve system
gain 2dB by replacing the feedline, the receive S/N will
remain the same.

73 Tom


_______________________________________________


See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions and ask for Sherman, W2FLA.

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_______________________________________________


See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions and ask for Sherman, W2FLA.

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Bill Aycock - W4BSG
Woodville, Alabama



_______________________________________________


See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions and ask for Sherman, W2FLA.

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