3Q5GT Beam Power Amplifier Tube. Designed for the output stage of a 3 way receiver. MFR: RCA, Raytheon. SKU: 3Q5GT. New old stock. No longer available for export.
3Q5GT/G, Tube 3Q5GT/G; Röhre 3Q5GT/G ID50647, LOCKED OFF PAR | Radiomuseum.org
The new American 3Q5GT electronic tube is used for replacing VT221 Xiwannian RCA 3Q5 gall bladder power amplifier. - AliExpress
3Q5 @ The Valve Museum
Request for 3Q5GT Single Headphone amp schematic | diyAudio