Note
Lafayette catalog number 53, p. 132. (SW-58C)
Radio News, Jul 1932, p. 43.
Radio News, Sep 1932, 175.
Radio News, Oct 1932, p. 199.
Radio News, Nov 1932, p. 263. (this ad references Sep 1928)
QST, Oct 1933, page 74.
The 58C is a rack panel version of the SW-58 (refer to QST, Oct 1933, page 79).
Radio News, Dec 1933, p. inside back cover.
The SW-58 was an SW-5 variant that featured changes in the RF-stage tubes (from ’27s to type ’58s) and the addition of a slide-rule dial. National also made an SW-58C, which covered the 200–400 kHz frequency range used by airlines of that era.
References
Review. Radio News, Aug 1932, p. 100.
