Hi Scott...One Quick question...
Whenever you do anything in life, it's to Achieve something, WHAT are you trying to Achieve?...Are you trying to help?
or just trying to annoy, and wind people up? If so, you are succeeding

I for one, cannot remember what I was doing, on a specific day in 1989..... Coverage maps for any station are strange
way back, when run by the IBA etc, Things were Actually Measured, and the Maps were called Measured Coverage Areas (MCA's)
Nowadays, we have the silly situation where MCA maps are Called Measured, but are Not Actually Measured
They are a combination of Computer Simulation, using quite good software, assuming site is engineered in a competant way

But The Coverage plots for AM, look like been done, by putting a dinner plate down on the paper, and drawing round it
So As PM says, It don't make Any difference to coverage, what a poorly drawn map says
As for Signal strength improvement, 1kw to 4kw gives twice the microvolts at the receiver, that's it. simples
What's this? super secret Coverage map you have, lets have a look at it please

To draw your own Improved coverage map, just draw a bigger circle, outside the original one !
or, why not build yourself an Ocean going Liner, and use an LP to Mark the portholes out

Sorry to be a bit sarcastic

Rod Watts