Note
QST, Sep 1937, insert between pp. 96, 97.
QST, Jan 1938, inside back cover.
Lafayette catalog number 69, p. 102.
Lafayette catalog number 73, p. 107.
Lafayette catalog number 78, p. 147.
The NC-81X is the same receiver but covers only the ham bands.
References
National's notes: QST, Sep 1937, p. 69.
Brief description. Radio News, Nov 1937, p. 279
A few notes: QST, Dec 1937, p. 61.
Radio Craft, Jan 1938, p. 403
National's notes: QST, Sep 1938, p. 63.
Radio News, May 1941, p. 51. (clearance)
NC-80