In this issue

• Testing High Voltage Tubes on a TV-7 and Its Relatives Issues with low test results due to improper filament voltage.
• Sylvania – The Perfect Host! Sylvania Lodge from Radio Industries, Oct. 1930.
• Safegarding Tube Life and Reliability Engineering Department, Amperex Electronics Corp. Service, July 1958.
• Wierd Tube of the Month: The Circuitron Tubes and associated circuitry placed inside the envelope to be resistant to ionizing radiation.
• Transatlantic Solid State QSO Service Dealer and Electronic Servicing, November, 1956.
• Why Grids Are Shaped the Way They Are Effects of varing the interelectrod espacing.
• Technical Evolution of American Broadcast Transmitters Edmund Lapodt Archive, RCA Corporation, ca 1920-1950.
• Whose Face Is Red? Problems with different results from different tube testers.
• Index to RCA Application Notes A listing from 1930 to 1980.
• RCA App. Note 107, Miniature-Tube Hearing Aid Amplifier RCA Manufacturing Company.
• Sylvania Government Tubes Sylvania offers surplus tubes to the public.