• Tube Type: 6H21B. • Sold as-is, typical for NOS vacuum tubes. This is a rare opportunity to acquire a full factory lot of Soviet-era vacuum tubes that are becoming increasingly difficult to find in this condition and quantity.
• Tube Type: 6H21B. • Sold as-is, typical for NOS vacuum tubes. This is a rare opportunity to acquire a full factory lot of Soviet-era vacuum tubes that are becoming increasingly difficult to find in this condition and quantity.