RTL SDR upconverter for shortwaves (0-30MHz)

Tomasz Watorowski has published a new build, a┬áNE612 RTL SDR Upconverter: This is a simple yet completely functional upconverter for the popular SDR donlge. The construction was build around cheap and easily obtainable mixer IC marked as NE 612, manufactured by Phillips Semi. Despite its limitations, it performs outstandingly well, at least when price-to-quality factor […]