[dsd]

Let me offer a different perspective. Is rf engineering and research obselete? Should the ability to experiment be locked into spectrum owned by monopolistic companies? And from another angle, is an Arduino project that blinks an LED worthwhile? Spectrum is a limited resource and amateur bands are one of the last ways I know of for folks to experiment within radio without submitting for expensive fcc certification.

[swiley]

This!!

My (admittedly limited) understanding of baseband demodulation started with the swling I did as a teenager.