Next, turn the Volume Control knob about half way on (white dot at top), and the Local-distance knob up (to right). Then push on-off switch to left; this will place the set in operation and cause the Tuning Dial to be illuminated. A very slight hum should then be heard from the speaker.
In about 30 seconds the tubes will be properly warmed up and the desired program can then be selected by means of the Illuminated Dial, by turning knob directly below same slowly to right or left.
After a suitable program has been selected, volume should be regulated by the Volume Control knob. The Local-distance switch should always be turned to the “local” (left) position for receiving local or powerful stations. Always tune the program in accurately with the Tuning Dial control knob, and regulate the volume afterwards with the Volume Control. This will give the best quality of reproduction.
The Illuminated Dial is graduated in two ways, viz: (1) In divisions of ten by large black figures, and (2) in frequency (kilocycles), the latter being marked in smaller red figures.
The easiest way to locate a desired station is to ascertain its frequency in kilocycles from the newspaper or any published list of broadcasting stations with frequencies, and then adjust the dial control so that the indicating pointer at bottom of dial window is opposite the desired frequency (red numerals) or at a position which would correspond most nearly to that frequency, in case the particular number desired does not appear on the dial.
It is suggested that the dial number (according to the 0-100 or black figure scale) for each station, be recorded as soon as heard, on one of the log cards furnished with set, so that at a later date the correct number for any station which has been previously heard can be determined at a glance by simply referring to the "log.”
A complete list of broadcasting stations, together with their frequencies, etc., can be obtained from the Superintendent of Documents, Government Printing Office, Washington, D. C. Such lists also appear from time to time in various radio magazines.
When through operating the set, simply turn the on-off switch to the “off” position (right). It is not necessary to remove the plug from the electric socket.
Owing to the careful construction and rigid factory inspection of Atwater Kent radio receivers, and the fact that there are few moving parts, practically no attention is necessary.
It might be well, however, to occasionally check the tubes by either taking them all out and having them tested by the dealer, or trying out new tubes (one at a time) in place of each in the set, noting any difference in performance. Be careful that the on-off switch is turned off when inserting or removing tubes, and that the correct type of tube is always inserted in the proper socket.
Tubes are usually guaranteed by their makers, through the dealer, and in case any trouble is experienced with tubes, the matter should be taken up with the dealer from whom they were purchased.
A periodic inspection of the aerial, lead-in and ground connection is also advised, all connections being carefully checked and cleaned and tightened if necessary.