If you cultivate an interest in building radios it’s likely that you’ll at some point make a simple receiver. Perhaps a regenerative receiver, or maybe a direct conversion design, ...

Editor’s Note: This DI is a two-part series. Part 1 discusses audio oscillators, namely the Wien bridge and biquad, state-variable, or two-integrator-loop configuration. Over the years, the Design ...

Entries keep ticking in for the One Hertz Challenge, some more practical than others. [Pierre-Loup M.]’s One Hertz Sculpture has no pretensions of being anything but pretty, but we can absolutely ...