In Part TWO of the 2009 Hamvention SDR Forum, FlexRadio's Gerald Youngblood K5SDR and Elecraft's Lyle Johnson KK7P square off on the two company's different approaches to implementing SDR.

At the time, neither Flex nor Elecraft did 'direct sampling' - they both used analog heterodyne stages and did their A/D conversion in the IF. The big difference was that the Elecraft radios looked like traditional ham equipment, with lots of knobs and buttons. The only Flex interface was a computer screen. Since then, of course, Flex has advanced to direct conversion, and added an option for a somewhat more traditional front panel. Elecraft has expanded their line of radios, but still uses analog conversion ahead of their SDR stage.

Both presentations have some useful slides, so the Radio Rating is B-.