Though radio had changed rapidly and radically over the past decade, that change only accelerated in the early twenties.  New regulations, the broadcast boom, the abandonment of spark for CW, and new transmitter, receiver, and antenna designs were all happening simultaneously.  No single one drove the others, but all together they advanced the radio art in a self-supporting feedback loop. Since publication of John Reinartz’s (1QP or “1-Kewpie”) tuner1 in 1921, hundreds of hams had used it on CW with … Continue reading →