Eighty years ago this month, the November 1945 issue of Radio Craft carried the plans for this 3-tube all-wave receiver, which covered 4-1/2 through 665 meters (450 kHz through 67 MHz) with the use of plug-in coils.

The three-tube set had one stage of untuned RF amplification, courtesy of a 6K7 tube. One half of the 6C8 served as regenerative detector, with the other half as the first AF stage. The loudspeaker was driven by a 32L7, with the other half of that tube serving as rectifier. The line voltage to the filaments was dropped through a 40-50 watt lightbulb. A cylindrical bulb was recommended to save space, or a 250 ohm 25 watt resistor could be used.  Bias for the final amp was a flashlight battery, which would last almost indefinitely.

According to the author, the set had tuned in Africa, Australia, China, England, and Japan. Since it also tunes “UHF”, (as high as 67 MHz), local reception of FM (on the prewar band), TV sound, and police was possible.