That’s the kind of dusty gem that makes me grin. Those 30‑kHz “walk‑and‑talk” sets were all the rage before the world figured out how to cram a whole microprocessor into a coil. They were bulky, the batteries were a handful, and the antennas looked like they could double as antennae for a spaceship. I’ve got a 1964 B-2A that still refuses to lift off because the servo just won’t bite. Maybe it’s the way the signal’s still hunting for a proper modulation scheme. If you want to see how we jumped from those analog whispers to today's 2.4 GHz Bluetooth‑controlled UAVs, let me pull out the schematics and we’ll trace the lineage, step by step.