Jim:
My college engineering book shows Boltzman's constant as 1.38*10^-23
Joules/K. Does that help any?
73 de
Gene Smar AD3F
-----Original Message-----
From: Jim Reid <jimr.reid@verizon.net>
To: towertalk@contesting.com <towertalk@contesting.com>
To: <towertalk@contesting.com>
Date: Sunday, December 30, 2001 1:31 PM
Subject: [TowerTalk] Thermal Noise Levels
>
>Hi,
>
>Need my memory jogged! I believe I recall that
>the kTB value, at near room temperature, and
>in a 1 mHz bandwidth, the formula will calculate to be
>-114 dBm of noise power -- is this correct? Or
>close. If so, and the bw were narrowed to 1 kHz,
>a 30 dB shrinkage, the noise power would then
>be -144 dBm. These numbers seem about correct.
>Appreciate a correction if I am not doing this right, hi.
>Yes, the correct units must be used, degrees K, but
>I have no reference out here to the value of Boltzman's
>constant, B.
>
>73, Jim KH7M
>
>
>
>AN Wireless Self Supporting Towers are now available! Windloading tables,
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>
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AN Wireless Self Supporting Towers are now available! Windloading tables,
foundation diagrams and charts, along with full details are now at the
AN Wireless Web site: http://www.ANWireless.com
-----
FAQ on WWW: http://www.contesting.com/FAQ/towertalk
Submissions: towertalk@contesting.com
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