In this issue

• Deciphering Date Coding of Post-WWII GE Tubes
• The History of Vatea Radio and Electrical Corp.
• National Union
• The 12AP4 Picture Tube
• Weird Tube of the Month: The Arc Oscillator
• Radio Checkers and Chess
• The Nuvistaplug
• RCA Surrenders Rights to Four Trade-Marks
• The Consentrated-Arc Lamp – Introduction
• The Development of the Concentrated-Arc Lamp
• Experiments With Magnets