Robison's Manual of radio telegraphy and telephony for the use of naval electricians (1918)
Robison, S. S. (Samuel Shelburne), b. 1867, United States Naval Institute, Todd, David Wooster, Hooper, Stanford Caldwell · Annapolis, Md. : The United States Naval Institute · leaf 127
y^ CO - 1 -i-_JI I—j»- mm, … MANUAL OF RADIO TELEGRAPHY AND TELEPHONY. 123 SIGNALS AND KEYS. In this system the oscillations in the antenna are continuously pro-duced by the arc, therefore the signals are not made by completely break-ing this oscillatory circuit, but by making a small change in wave length. This change is made…
