[BC] Class "D" AM Towers

[PeterH]

On Feb 15, 2010, at 9:59 AM, Dana Puopolo wrote:

> Phoenix has several class Cs with 5/8 th wave towers-they get out  
> quite
> well...

Well,

If you have a 460 foot tower on 1230 and a 410 foot tower on 1400,  
each of which is going to produce about 430 mV/m/kW at 1 km, 1.78  
times the minimum field for the class, and which translates to 3.18  
times the power if using the minimum conforming radiator, then you  
do, indeed, have a good situation.

That those two Class Cs couldn:t work out a tower-sharing arrangement  
is another matter.

However, 550 and 1400 appear to be sharing a tower ... 215.2 degrees  
on 1400 and 70.5 degrees on 550, but only 283 mV/m/kW at 1 km on 550,  
just 2 mV above the minimum, but 440 mV/m/kW at 1 km on 1400, on  
account of the ground system being sized for 550.