Sylvania Electric Products 6JS6C Vacuum Tubes

The Sylvania 6JS6C vacuum tube is a high‑power beam‑type line‑output valve designed for television sweep circuits, i.e., the horizontal deflection stage of CRT equipment. Manufactured by Sylvania Electric Products, this tube is widely referenced as a dedicated television sweep tube used to control the electron beam in vintage CRT displays. Today it is commonly sold as a genuine replacement (NOS or used) for restoration and retrofits of mid‑century video/television gear, and it has seen use in amateur‑radio designs that employ high‑power sweep tubes in certain configurations. Buyers typically seek authenticated Sylvania production or equivalent NOS stock to preserve original performance in vintage TV repair projects, ensuring compatibility with classic line‑output circuitry. The 6JS6C’s reputation as a robust, high‑voltage beam tube makes it a recognized option for restoring or recreating the gain and sweep characteristics of historic television and related equipment.