Not related to survival -- but certainly related to communications. I thought readers of this forum would be interested in this: FCC to Investigate Raised RF Noise Floor And another version of the story from the ARRL, the body that supports Amateur radio: FCC Technological Advisory Council Initiates Noise Floor Inquiry As noted in the 2nd article, "many types of devices generate radio spectrum noise. In the case of incidental radiators — devices not designed to emit RF but do so anyway — there is little regulation governing such noise. 'Most electric motors, light dimmers, switching power supplies, utility transformers, and power lines are included in this category,' the TAC announcement explained" -- which would explain to the layman some of the sources of RF.
Sadly, eliminating noise emissions from devices is usually an easy fix. Typically, a few cents worth of parts. But they are omitted to save cash and now we have a big mess.
In another topic they were discussing how to avoid government from monitoring comms post SHTF. Based on what the FCC does (or rather, fails to do) during normal times, I think we have little to worry about.
If the FCC wants to Monitor the RF Noise Floor, they should start in Congress, in the Capital.... This boys do NOTHING but increase the Noise....
Ahhh... Electrical and electronic devices that emit RF not in FCC Compliance. Just find all that Chinese junk that everybody imports and get it out of the country. Make the importers refund to the consumers the actual retail cost of the items and be done with it!
Almost exactly right DR... Ever sit at a traffic light and listen to your radio to the RF countdown in static coming from the crosswalk light, or the massive increase in RF interference when you pull up to an intersection. LEDs light emitting diodes, A type of FET or in other words each light is in effect a small radio transmitter. Some battery chargers in the NiCad and Li ion class are horrendous!! just drive by a construction site or someone's back yard garage while the are charging battery packs.