RCA 6AH4GT Six-Pin Cylindrical Glass Vacuum Tube

RCA 6AH4GT is a six-pin, cylindrical glass vacuum tube that contains two triode sections in a single envelope. This dual-triode device, produced by RCA, is commonly encountered in vintage equipment as a driver or small-signal stage; in CRT-based systems it has been described as a low-mu triode suitable for vertical-deflection related circuits. The plug-in form factor with a six-pin base makes it a drop-in option for compatible sockets in mid‑century electronics, where two triode sections can be configured in cascade or common-cathode arrangements to achieve the desired gain and signal handling. As with other RCA tubes of the era, the 6AH4GT is documented in historical Receiving Tube Manuals and RCA data sheets that outline its intended electrical characteristics and applications in analog signal paths for both audio and display gear.