In this issue

• Readers Report
• High-Purity Nickel – A 1950’s Break-through for WE Tubes
• Early Swiss Contribution in Micro-Wave R &D Before and During WW11
• Sarnoff Gets Ready for UV 201’s
• The Umac
• Stems n’ Seeds in Tubes
• DeForest and Inons – He Wises Up
• “Seconds” in Tube Manufacture
• e-Bay Hype: The 6SN7 Isn’t Alone