12BE6

Miniature 7-pin pentagrid converter (heptode layout) designed to serve simultaneously as the local oscillator and mixer stage inside compact AC/DC AM superheterodyne radio receivers. Equivalents: ECC91, 5750, CV1763, 6BY6. Real-Life Examples: Zenith Trans-Oceanic portable shortwave radios (chassis 5H40), classic post-war "All-American Five" table radios, vintage tube-based car radios.