The percentage of Part 15ers who use computers in connection with broadcasting is probably high, and no doubt DSL is a common form of internet connection, and as it happens ADSL (Asynchronous Digital Subscriber Line) utilizes a frequency band from 24 KHz to 1.5 MHz, which is, yes, half way into the AM band.
In reading about how it works I was astonished and impressed by how the little DSL modem box negotiates to compensate for telephone line noise such as RFI from AM stations. How fortunate, because I have a nearby 5000 watt station that is present on my phone line so that I can actually listen to it during line tests. Yet the DSL is normally able to plow through.
But a week ago the DSL connection began failing very frequently until at last I traced the cause. My telephone happened to be on a 10-foot extension cable which got coiled on the floor at the foot of my 3-meter AM 1550 antenna. The extension cable was receiving my AM signal and adding it to all the other noise, which proved too much and the modem was giving up. By simply removing the extension cable away from the transmitting antenna the DSL service again became stable and DSL streaming is back on.
In this thread it would be interesting to hear other experiences not only with DSL but also cable modem, which might even touch FM frequencies.
gotta wonder what dsl does to am band reception.
I have AT&T DSL, and to be honest, I have had no problems with AM band interference at all over the past two years that I've had the service. I am sure that if I were to put my radio close to the modem it might pick up some noise, but in every part of the house that I listen, I do not notice anything.
I love my DSL service. You can't beat the value! And these days, they offer the basic DSL service for what I used to have to pay for dial-up!
No RFI from the DSL modem. However, the DSL modem does not like my AL-80B, key down at 800 watts. LOL!