In this issue

• Westinghouse Developments Leading to the WD-11
• Review: Jackson Model 648 – Complete Tube Tester Manual
• Packing Those Big Ones
• A History of General Electronics
• A 6AX5 Gammatron Amplifier Osci;llator
• Robert Sutherland, W6PO
• More Australian Radar Tubes
• “Big Blue” Tubes: IBM Part Numbers vs. Industry Identifiers
• The 1AE4 – “No Joy at RCA