Note
QST, Feb 1937, p. 98.
Radio, Mar 1936, p. 95.
Radio's Master Catalog, copyright 1937, p. F-52.
Radio, May 1936, p. 91. ("with improved brilliant tube")
Radio, Dec 1936, p. 70. (with explanation of its operation)
Radio News, Jun 1942, p. 44. (the empty cabinets sold as surplus)
References
Review: Radio, Jan 1937, p. 116.
Brief description. Radio News, May 1937, p. 691
Technical description. Radio Craft, Jun 1937, p. 723.
