21 Tubes, AC
The Pilot TV-37 was one of the first economy televisions that sold for under $100 at a time when most televisions cost more. The Pilot used a three-inch 3KP4 CRT with white phosphor, which is considered very rare and difficult to find. This Pilot first came in my possession in 2005 as a mere chassis with a dead 3KP4 CRT and no tubes. This Pilot was rebuilt almost completely, and the cabinet was created using thick plexiglass.