• Amplified AGC in Communications Receivers - Dance
• An Easily Added _S_ Meter
• Conversion of 1.4V Superhet to Low Consumption Valves - Hall
• Converting Battery Portables to Mains Operation - Dunn
• Economy Measures for All-Dry Receivers - Caborn
• Engineering Features of the UX-245 - Engel
• Suppressor Grid Modulation - Green
• Half Wave and Doubler Power Supply Systems
• Homemade Vacuum Tubes - 1917
• Modernise That Valve Portable - Rolfe
• Modifications to the CR100 - Studley
• New Life for Mains-Battery Portables - French
• Power supplies with vacuum tubes
• Power Transformers Design and Rebuilding
• Pratical Do It Yourself Vacuum Tube Voltmeter
• Semiconductor Tests with an Ohmeter - King
• Techniques to Extend the Service Life of High Power Vacuum Tubes - Johnson
• The 2B6 - A Duplex Triode - Der Mel 1933
• The radio CAR - 1919
• The Story of the Valve - Gardner 1965
• Tubes or Transistors - Moe 1959
• Tubes Within Tubes - Rowe 1926
• Using Surplus Meters - Wright
• Vacuum Tubes and Their Uses - Muhleman 1926

Radio

• Automatic Tuning
• Converter Unit for the New FM Band
• DX Crystal Radio Receiver
• One Compactron Receiver
• The Crystal Radio - Evison QST 1997 12
• Tips for Servicing Your Radio
• What Are the Facts About FM - Murtfeldt 1940

Audio

• Cathode Follower Loudspeaker Coupling - Fletcher Cooke
• Cathode Follower Replies
• Mullard 5 Valve 10 Watt Amplifier
• Quality in Audio Amplifiers - Hollister 1933
• Some aspects of High Quality Reproduction - Traugott 1927
• The Williamson Amplifier - Williamson 1952

• Ricevitori a Modulazione di Frequenza
• L'amplificatore magnetico - Louden - 1953
• Potenziometri su misura (Da Elektor maggio 1980)
• Raddrizzatore a Vapore di Cesio - Burger Turrentine 1951

• Zichtbaar Trimmen - Wobbelen