In this issue

• Identification of the Radio Equipment Used on the NC-4 Plane Analysis of the equipment and which tube they used during the first trans-Atlantic flight.
• Selling Tubes on Consignment Electronics, June, 1932.
• The Locked-Door Tube Factories Radio magazine, Nov., 1924.
• Wierd Tube of the Month: The Arctarus Coronet Arctarus introduces a metal line of tubes with a glass button stem.
• Demountable Tube – The GE FZ-1 GE produces a 100 kilowatt transmitting tube with a replacable filament.