Wouldn’t that increase the happiness of North Korean citizens? It’s a worker’s paradise, so I’m told! Best Korea must just be protecting its people from foreign propaganda. /s

I mean, if that’s North Korea’s concern here, they should ban receivers that can pick up outside stations and switch domestic use over to some kind of proprietary system. Trying to create a buffer zone around the state just seems unrealistic.

kagis

It sounds like they more-or-less do do that for television, just not radio:

en.wikipedia.org/wiki/Television_in_North_Korea

Television sets sold in North Korea are able to operate only on the PAL and DVB-T2 systems, to prevent them from being able to pick up broadcasts from South Korea (which use NTSC System M analogue and ATSC digital) or China (which uses DTMB digital). However, broadcasts from Russia can be picked up, as they are also DVB-T2. Imported TV sets that are able to operate on both PAL and NTSC, such as those from Japan, have their NTSC abilities disabled by the government on import.[9]

Apparently they do run “jamming” stations to try to block reception of some radio stations from the outside world, though.

Yes