Re: Gonna ask what may be a stoopid question here...
Doesn't even need to be an official RF device. I recently installed a (CE-marked) 12v switchmode power supply, bought from Amazon, to drive some electronics. Seemed to be working fine, until I noticed later that none of the WiFi devices in the house could connect to the router.
A 'scope on the output of the PSU revealed vast quantities of RF hash at fundamental frequencies well into the MHz range, and harmonics far beyond that. Several ferrite chokes and multiple capacitors later I got the hash down to a few mV, and the WiFi devices started working again. A non-technical punter would not have been able to resolve that
And that's a device that supposedly meets EU standards. They'd be better to fix that sort of EMC issue before worrying about folks tweaking their ISM-band WiFi to increase its range
Biting the hand that feeds IT
