Topband: ADC overload from MW transmitters

[Jim Brown]

On Sun,10/18/2015 8:59 PM, Steve Ireland wrote:
> Phil lives line of sight from the Australian Broadcasting Transmitter installation in the northern suburbs of Perth. There are three AM transmitters there which run 24 hours a day, seven days a week:
> 6PB at 10 kW on 585 kHz; 6RN at 20 kW on 810 kHz; and 6WF at 50 kW on 720 kHz,

That's typical of medium-size cities in the US for high power 
broadcasters, but major cities typically have twice as many. Both large 
and medium-size cities, as well as smaller ones, typically have 6-10 
stations in the 5kW range, and more in the 1kW range. Chicago is typical 
of a large city (like New York, Boston, Los Angeles, San Francisco) -- 
it has 50kW on 670 kHz, 720 kHz, 780 kHz, 890 kHz, and 1,000 kHz. 
There's also a daytime only station with 50kW on 1160 kHz. Cincinnati is 
typical of smaller cities like Indianapolis, Detroit, Minneapolis, 
Cleveland, St Louis, and New Orleans, with 2-3 50kW stations and many 
smaller ones. Cincinnati 50kW stations are on 700 kHz and 1530 kHz.

I grew up in a small town in WV, with three 5 kW stations within two 
miles on 800 kHz, 930 kHz, and 1470 kHz.

Bottom line -- there's a lot more broadcasting in the US than in most 
countries.

73, Jim K9YC