[olfactory]

A few interesting things about SDR and the kind of tinkering and experimentation one can do:

- in amateur radio, SDR is starting to dominate new commercial designs, but has not yet overtaken the superhet.

- you can buy a low end SDR (rtlsdr) for $20 or a better one for $120 (sdrplay) or a high end one that transmits for $2K (flexradio)

- Ettus hardware is great if you have the dollars and only care about VHF/UHF

- if you want to play with the concepts without buying hardware, just learn DSP.

- there are many interesting applications that are now fairly affordable to build that used to require massive budgets (due to cheaper FPGAs)