Note
QST, Aug 1936, p. 71.
Radio, Feb 1938, p. 93.
11-UA (universal): 9.5 to 20,000 meters - $75.00
11-MA (marine): 9.5 to 3.75 meters - $54.00
11-AA (amateur): 9.5 to 550 meters - $46.00
Sargent’s “Universal” TRF set had a regenerative detector and tuned from 15 kHz to 32 MHz. Amateur (11-AA) and Marine (11-MA) versions covered ranges appropriate to those services.