In this issue

• The Soviet 1500-Series Tubes-Updated. Updated listing of 1500 series “Special Purpose” tubes.
• The CeCO “H” C. E. Company plugs it’s “hotter” version of the 201A.
• “Filteramic” Antenna Plain Talk and Technicial Tips, August 1960.
• The Early Years of the Klystron History of the Varian Brothers, Stanford and Sperry.
• Westinghouse “DIY” Tester Westinghouse enters the self-test market.
• Philco Rectifier Conversion Early TV modification to replace 3 small rectifiers with 2 larger ones.
• Edison Mazda Lamps Edison advertisement promoting light bulbs circa 1927.
• New 100-Milliampere Tubes RCA Application Notes, AN-189.
• Special Alloy [for Filaments] Special filament wire without nickle used to reduce breakage.
• The Evolution of a Vacuum Tube From Radio, Jan. 1937, another joke story.
• Plastic Tube Spots Corona Philco Serviceman, Jan. 1956.
• RCA Amp Demonstrator, 1935 Unique training aid board backed by actual circuits for demonstrations.