In this issue

• Non-Tubes from Eimac Products from Varian AG of Switzerland.
• A Stabilized Neon-Tube Coupled Amplifier AIEE Transactions, September 1941.
• Wierd Tube of the Month: Westinghouse Lenard Ray Tube WL-785 A tube designed to radiate Lenard or Cathode Rays for pest and bacteria control.
• Heater-Cathode Hum Radio Maintenance, June 1948.
• The Stenode Non-Tube Building a crystal filter inside a tube envelope.
• Speed History “Speed – The Perfect Radio Tube” ca. 1931.
• The “Z” Tube Rectifier Amateur Radio, July 1925.
• The Metal Receiving Tube GE re-enters the receiving tube market with external metal tubes.
• RCA Application Note 29 – The 2A3 RCA December 29, 1933.