In this issue

• Manfred Von Ardenne Laboratory Radio Industries, October, 1931.
• Filamentless Tube Radio Industries, October, 1931.
• Ionized Gas Replaces Tube Filament Popular Mechanics.
• Analyzing the New Eimac Tube Radio, November, 1934 reviews the 150T.
• GE Proudly Announces the Compracton GE Techni-Talk, Sept.-Oct. 1960.
• Present-Day Observatons GE Techni-Talk, March-May 1961.
• Measuring 201As Table for “How To Use Vacuum Tubes”, in Radio Broadcast, Feb. 1926.
• RCA Fixes Its 6BQ7A 6BQ7A file in Government Marketing files in Dowd-RCA archive.
• Television Rental by Radio Dealer Photofact Servicer, Feb. 14, 1958.
• Test Tube Kit A kit of tubes to test resistance welders.
• Tubes of the Humble “AA5” Radio Strings of tubes whose heaters could be wired in series.
• 6BK4A-Bulb Browning RCA Victor “Plain Talk and Technical Tips,” January 1965
• Application Note-RCA Miniature Tubes RCA application note No. 106.
• Geiger Counter Project How to make a portable Geiger survey meter.
• Philco Transistorized Radio for Chrysler Philco Serviceman, July, 1955.