I'm a believer in true knob and button radio interfaces, and I'm not the only one. A small team, formed around Stu, K6TU developed the Contest Knob, which is now today manufactured by FlexRadio Systems under the name FlexControl. In this interview K6TU reveals the ideas behind the Flex-Control and describes in detail the steps from the design to the industrial production.
The FiFi SDR is a second generation allband HF receiver. Beside it's QSD it comes with a onboard soundcard and a powerful ARM Cortex M-3 CPU which leaves a lot of room for experiments. I was glad to win Kai-Uwe, DF3DCB one of the FiFi-SDR founders for an interview.