Taking a cheap little USB gadget and using it as a Software Defined Radio (SDR) to explore the radio spectrum from the tens ... control a cheap 27 MHz RC toy using the 43rd harmonic of a 631 ...

Stock, this radio module is just okay, but with a few modifications, it can be turned into a very good receiver with a spectrum analyzer ... and this is where most RC hobbyists stop.

There's lots to discover in the electromagnetic spectrum. Here's a tour that begins with radio waves and takes you through microwaves, infrared radiation, light, ultraviolet radiation, and X-rays.

(Bloomberg) -- Senate Republicans are considering a massive sale of radio spectrum intended to generate billions of dollars to help pay for President Donald Trump’s agenda and free up airwaves ...