The Magic Wallet.
The more money you **retrieve** from it, the more money is **inside** it.
Or a “magical money printing” machine.
“…power-supply rails dynamically expand and contract with the output signal, allowing much more power to be delivered to the loudspeaker while lowering the plate dissipation…”
But what is even nicer, is that laconic “Next Time” section, … the one with that brief, single sentence, and the supercharged circlotron schematic …
Can’t wait to see THAT one …