Note
QST, Dec 1947, inside back cover,
QST, Jan 1948, p. 161.(Internal view)
QST, Jul 1948, inside back cover.
Lafayette-Concord (1949 #949), p. 144.
Allied Radio catalog 1951 (copyright 1950), p. 139.
QST, Jun 1951, inside back cover.
QST, Nov 1951, inside back cover.
Allied Radio catalog 1952 (copyright 1951), p. 137.
QST, Apr 1952, inside back cover. (NC-183D)
QST, May 1952, inside back cover. (NC-183D)
Allied Radio catalog 1953 (copyright 1952), p. 36.
QST, Apr 1954, p.111.
Allied Radio catalog 1956 (copyright 1955), p. 194.
Walter Ashe catalog 1957 (probably issued in 1956), p. 2.
Allied Radio catalog 1957 (copyright 1956), p. 243.
Allied Radio catalog 1959 (issued in 1958), p. 375.
References
See National's Notes: QST, Jun 1949, p. 73.
See National’s Notes: QST, Feb 1952 p. 71. (adding squelch)
See National’s Notes: QST, May 1952 p. 79.
Allied Radio catalog 1958 (copyright 1957), p. 266.
The 16-tube National NC-183 covered 0.54–31 and 48–56 MHz in five bands. It was a single-conversion set with robust audio from a pair of push-pull 6V6s.
The NC-183D was double conversion above 4.4 MHz and single conversion below that. Its five bands covered 0.54-31 and 48-56 MHz. The NC-183D used 17 tubes, and its IF stages had a dozen tuned circuits in the single-conversion mode, 16 when using double conversion. It had a new crystal-filter circuit and a temperature-compensated main-tuning capacitor. The
"Nan-D" NC-183 was a 16-tube, single conversion set with the same tuning ranges.
