Fifty years ago this month, the December 1970 issue of Science and Electronics carried the plans for this one tube receiver covering most of the broadcast band up through VHF, 600 kHz to 38 MHz.

The set used a single tube, a 6D10 triple triode Compactron.  One stage was used as RF amplifier, the second was the regenerative detector, and the third stage served as AF amplifier to power the headphones. Band switching was accomplished through plug-in coils made out of commercial oscillator coils wired into old tube sockets. The front panel featured the main tuning dial and bandspread, as well as volume and regeneration controls. The sensitive circuit was said to be able to pick up anything worth hearing, and could be put to use by the beginning ham or SWL.

According to the magazine, with a little bit of practice, the set would produce around-the-world reception on a daily basis.