RadioBanter - View Single Post

November 11th 04, 04:50 AM

On Wed, 10 Nov 2004 20:50:31 -0600, (Richard
Harrison) wrote:

That`s a 6dB change from doubling the distance.

Hi Richard,

Unfortunately, from FCC field data for BOTH AM and FM curves over real
earth, they show anywhere from 6dB to 20dB+ depending on range from
the transmitter. In most respects departure has to do with earth
curvature and earth soil conditions. Even sea water paths do not
recover the greater than 6dB requirements.

73's
Richard Clark, KB7QHC