My National NC303 Was Hot

Knobs, Knobs, and More Knobs! It Ws A Virtual Cockpit!

My first real receiver was from National.

This is a National Company Model NC 303 15-tube amateur band only receiver that tunes the 160, 80, 40, 20, 15, 11, and 10 meter radio amateur bands. There is also an "X" band that functions as a tunable IF in the 30 to 30 MHz range for use with broad-band crystal converters. Individual scales on the "X" band provide direct reading calibration for the 6, 2, and 1 1/4 meter amateur bands.

Each amateur band has an individual calibrated dial scale. Tuning is facilitated by a rotating dial drum such that only the calibrated dial scale that is in use is visible.

The radio is a double conversion superheterodyne receiver that includes a Q-multiplier notch rejection filter, an S-meter, variable IF selectivity plus selectable SSB with a fast attack/slow release AGC circuit, a muting circuit, a heterodyne detector, and separate noise limiters for AM and SSB and CW reception.

The radio does not have an internal speaker. There is a two-screw terminal strip on the rear of the radio for connecting the wires of an external speaker.