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 204
brating open sendingcircuits. Calibrating sending and receiving circuits enables us to select and sendand set our instruments to receive definite known wave lengths and is thefirst requisite of tuning. In order that our receiving circuits may beselective, i. e., respond only to the wave lengths for… … aeo 2.60 Z70 2B0 2.30 300 3IO 320 330 ^M-O 350 360 37o 3BO 3&0 WAVE LENGTHS IN METERS Fio. 112. 196 MANUAL OF RADIO TELEGRAPHY AND TELEPHONY. that a wave train may be long enough to build up current in a rigid re-ceiving circuit the sending circuit must be a persistent oscillator, i. e., itmust…
