----- Original Message ----- From: "Arthur Feller" afeller@ieee.org To: amsat-bb@amsat.org Sent: Friday, March 07, 2008 2:20 PM Subject: [amsat-bb] FYI: More background noise?

Wi-Fi Cloud Hovers over Salt Lake City

See: http://spectrum.ieee.org/feb08/6025

Life is short. Be swift to love! Make haste to be kind! - Henri Frederic Amiel, philosopher and writer (1821-1881)

Hi Arthur,

I have seen the Wireless Geography in Salt Lake City ! !

The IEEE Spectrum shows that the minimum signal level of -51 dBm downtown buildings is a very very strong signal not to mention the maximum level of -15 dBm on top.

A single 1/2 wave dipole (Gain = 2.14 dBi) directly connected to a zero bias Schottky diode HSMS 2851 at 2.45 GHz will detect about 0.3 mV with - 51 dBm and 1000 mV with - 15 dBm

You don't need a receiver up there but a multimeter will do the job !

73" de

i8CVS Domenico