These NOS/NIB (3) Sylvania 17DQ6B 17GW6 Vacuum Tubes are vintage electronics that have been tested and are ready to use in vintage audio and Ham  equipment. Made in the United States by the reputable brand SYLVANIA, these vacuum tubes are a valuable addition to any collection of vintage parts and accessories. With a focus on quality and authenticity, these tubes offer a glimpse into the history and craftsmanship of vintage electronics.