To: | <towertalk@contesting.com> |
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Subject: | [TowerTalk] Coax Loss |
From: | "Wilson Lamb" <infomet@embarqmail.com> |
Reply-to: | Wilson Lamb <infomet@embarqmail.com>, "Tower and HF antenna construction topics." <towertalk@contesting.com> |
Date: | Thu, 4 Feb 2010 14:06:59 -0500 |
List-post: | <towertalk@contesting.com">mailto:towertalk@contesting.com> |
This might be a little easier if we remember that the dB expression refers to a multiplication. 10 dB loss means you multiply by 0.1. Thinking of it this way, and remembering that multiplication is accomplished by adding exponents (10^2 X 10^2=10^4), it's pretty easy to visualize that if we multiply by 0.1 on the first 100 ft, then we do it again on the second, 0.1 X 0.1=0.01, or down 20dB. Wilson W4BOH _______________________________________________ _______________________________________________ TowerTalk mailing list TowerTalk@contesting.com http://lists.contesting.com/mailman/listinfo/towertalk |
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