5R4GY RCA (Brown Base) Rectifier Tube in Original RCA Box. Most Favored 5R4 in History.

• Still in the Original Three Color Round Logo RCA Box.
• RCA 5R4GY Rectifier Tube.
• One of the tubes that built America and won WW2
• Most favored 5R4 in history by both engineers and music lovers.
• 1950’s Big D-Getters, brown micanol bases and wire arbors help make this tube a real winner.
• Great for power supplies and all kinds of amplifiers.
• Big clean and clear bold sound. Sweet and creamy at the same time.
• Developed by RCA in 1942, its hard to beat the original legend!

If multiple tubes are ordered, micro matching is automatic.