117L7 Vacuum Tube – Rectifier-Pentode Combo for Transformerless AC/DC Radios

The 117L7 combines a half-wave rectifier and a beam power pentode in one envelope, built to run directly off a 117V AC/DC line without a power transformer — a classic three-way portable radio and phonograph tube.

• Tube type: Rectifier-pentode combination
• Heater: 117V AC/DC, no transformer required
• Typical use: Combined rectifier and audio output stage in transformerless AC/DC portable radios and record players

Also cataloged as 117L7/M7GT.