This may be somewhat hard to understand, but I'll do my best to explain it. If My station gets 1.8 miles in the daytime, on a clear freq. of 1600 khz, about how far could it reach at night if there was a station operating about 150 miles away on the same freq with occasional fading in and out with a weak signal at best?
This may be somewhat hard to understand, but I'll do my best to explain it. If My station gets 1.8 miles in the daytime, on a clear freq. of 1600 khz, about how far could it reach at night if there was a station operating about 150 miles away on the same freq with occasional fading in and out with a weak signal at best?
General comments... There are dozens of licensed AM broadcast stations operating on 1600 kHz just in the eastern US. Their skywave signals at night can extend for hundreds of miles. At distant receive sites normally they combine to make none of them intelligible/usable. But their combined field strength there would still interfere with the signal of a Part 15 AM setup, except close to its antenna.
An AM signal needs to be quite a bit stronger than whatever else is on the channel in order to be heard without a lot of interference. So at 1.8 miles, where your Part 15 signal is very weak, it won't take much nighttime skywave from other stations to interfere with it.
//
I operate on 1700, which is completely clear on the U.S. West Coast; however, there is a Mexican station in Tijuana on the same frequency. Supposedly, the station is 10 kw. At night, they dominate the channel and reduce my coverage to blocks. Finding an open frequency in a crowded major market is tough!
Frank
www.easthillradio.com
Our signal @ 1620 can make 2 miles during the day, but things get rough at night. By the time you hear us, you can almost see my front porch light! I've put a timer on the transmitter so that we just go dark after 10 pm. Might as well save the electricity.
1620AM Copperhead Radio,
Lucama NC