G. W. A. Dummer & J. Mackenzie Robertson 
British Special Quality Valves and Electron Tube Devices Data Annual 1964-65 [PDF ebook] 

British Special Quality Valves and Electron Tube Devices Data Annual: 1964-65 presents data on various special quality valves. The selection also presents information in different types of special electron tubes and devices. The text discloses information such as heater, capacitance, characteristics, operating conditions, and range values. As for electron tubes and devices, the selection presents the characteristics, cathodes, typical operation, and maximum ratings. The book will be of great use to electronics designers, engineers, and technicians. Electronics hobbyists and end-users will also benefit from the text.