In this issue

• Wierd Tube of the Month: RCA’s Doomed Type 1. RCA introduces a small rectifier for use in auto-radio market.
• The 1500-Series Tubes. Soviet era special purpose tubes.
• John Hays Hammond Jr. Torpedo Relay Tube. Early tube used to control a torpedo boat remotely.
• Sonar Contact! – With Tubes. Seldom discussed use of tubes for use in SONAR equipment.
• Hytron “Bantam Junor”. Types and specifications for Hytron’s Bantam Junior line of small tubes.
• Tracking Down Grid Emission. Radio Tube Hints, Vol 1, Sylvania Electric Products Inc., 1943.
• Amperex. Amperex Electronic Products Corporation starts production in 1932.