Early radio receivers worked on a principle called Tuned Radio frequency (TRF), patented in 1916. They weren’t very easy to use, requiring each stage to be tuned to the same frequency (until ...

It’s still not the highest performance receiver in the world, but it’s astoundingly simple ... as amateur radio, toy walkie-talkies, toy electronics kits, and unexpectedly in very cheap ...

The Digital Radio Mondiale consortium is welcoming the announcement of a small and affordable radio receiver model that will be made in India. It will be manufactured by a local affiliate of Solar ...

The broadcasts cannot be heard on a simple AM/FM radio receiver. There are many receiver options, however, ranging from handheld portable units which just pick up Weather Radio broadcasts ...