RadioBanter - View Single Post

November 25th 03, 09:01 PM

Well -- the original post was from he asked:
"How far can a base two meter radio antenna transmit and recieve so as to be
'useable' when the antenn is 100 feet tall above the earth, and the
surronding area is fairly level. (no hills or mountains). I am
talking about a 50 watt base and 50watt mobil. If there is a formula
somewhere, would appreciate the input."

So Artsci should help him.

--
73 From The Wilderness Keyboard
--------------------------------------------------
"Richard Harrison" wrote in message
...
K1YW wrote:
"Artsci takes into account:
To properly estimate a signal`s range, you must have a few important
figures----

Frequency / Band
Transmitter power (in watts)
Antenna height (from sea level)
Antenna gain (net after coax loss)

As a practical matter, first you must have a line-of-sight path. Then
you can worry about path attenuation, gains, losses, transmitter power
and receiver sensitivity.

Attenuation between stations with an obstructed path (including earth
bulge) rises so rapidly with the obstruction that non of the other
factors matters except in the case of brute force communication, such as
atmospheric scatter.

Best regards, Richard Harrison, KB5WZI