In this issue

• More on Houck and the Super-Ducon Continuation of the article.
• The DuMont K1376 A triple ended cathode ray tube.
• “10 Dollar Award” Philco Serviceman, Oct.1953.
• Tubes and Transmitters by DeForest Radio Age, Feb. 2000.
• GE Copper-Core Anode Material GE Techni-Talk, 1959.
• Beryllia Hysteria Discussion on the potential danger of BeO used in tubes.
• Helium Tubes QST, November, 1924.
• Those Radio Tube “Seconds” Radio Industries, May. 1930.
• The WL-461 New (1937) UHF tube that used a tantalum anode.
• 1B3GT – An Engineering Challenge RCA Engineer, Feb.-March 1960.
• The 6C21 Scandal A review of the 6C21 failures in SRC-584 RADAR sets.
• Portland Endorses Hytron Portland, OR police department praises the Hytron HY69.
• Dark Heaters Plain Talk and Technical Tips, Nov.-Dec. 1961.
• A Schickerling Promotion Press release on the Schickerling tube line.