1H5GT

Battery-operated, low-drain octal 8-pin multi-unit tube combining a signal diode for detection and a high-mu single triode for first-stage audio amplification in portable equipment. Equivalents: 1H5G, 1H5GT/G, VT-223. Real-Life Examples: Zenith Trans-Oceanic portable shortwave radios (early battery models), portable post-war "camera-style" personal radios.