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, it’ll take a couple ...

An old — on second thought, make that “very old” — Sony AM/FM broadcast transistor, which I somehow acquired, finally got a little too cranky for me, Figure 1. The analog-dial tuning knob was sluggish ...

Transistors have come a long way. Like everything else electronic, they’ve become both better and cheaper. According to a recent IEEE article, a transistor cost about $8 in today’s money back in the ...