[BC] Chucks AM Grounding Question

[Dave Hultsman]

Cowboy is correct.....
 
The two major problems with AM signals is the M3 Conductivity of the earth and the  skywave ionosphere at night.  If AM could be redesigned, AM's SHOULD have an allocation tables calculated for daytime coverage based on ground wave signals similar to the FM rules.
 
In this case you take the average of all conductivities of the US and then determine your input power levels and the coverage based on a coverage area;  i.e.    Class D AM 50 kW.,. ND 150 miles, Class C AM 10 kW 75 miles,  Class B AM,  5 kW. 40 miles,  Class A AM,  2.5 kW., 25 Miles..
 
The AM input power would be determined by milage to a coverage area.  You could expect a Class A local station to do 25 miles in 30-40 mmhos conductivity and also in a 3-5 mmhos conductivity. In the 30-40 conductivity the input power may be 2.5 kW.  In the 5 conductivity area the input power may be 9.6 kW.
(Note: estimated figures, no calculation made)  and so for other power levels in sime cases a 50 kW. signal base on the avaregae may have and inout power of 35 kw. and the lower conductivity have 100 kW. input power.
 
Then if we send a satellite to vacuum up the ionosphere layer,  we could all have the same coverage day and night and elminate all these extra AM towers that stick up in the air, pollute the sky and kill birds.
 
However I think its too late to start over.
 
JMHO   HI
 
Dave Hultsman
 
In a message dated 2/15/2012 7:33:20 A.M. Central Standard Time, curt at spam-o-matic.net writes:
>Think of it this way...
>You're trying to flood an area with a garden hose. ( transmitter )
>Areas of high conductivity ( concrete ) will propagate water across
>it fairly well.
>Areas of poor conductivity ( sand, or sponge ) soaks it up faster
>than it can traverse.
>A strip of something hard ( the power grid ) will help a little, but
>the majority is still sponge.