[kodera2t] takes us through a few circuits built with these tubes, from a simple subminiature vacuum tube radio to a more complex reflex radio. Taking a walk through this history is an interesting ...

When you think of an old radio it’s possible you imagine a wooden ... their induction coils they don’t have the resonant tank circuitry that a typical early-20th-century transmitter would ...

generating high-frequency radio waves purely through the use of integrated circuits and a set of patented algorithms without using conventional analog radio circuits in any way whatsoever.