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U O No 3 a Memorizing by sound only the letter characters 7 0
T No 1 Lettering charts
T No 3 Standard tape scale and its use
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adjustment assigned positions buzzer code practice tables completing Unit Operation ECOO Ediphone EE•O EEEE EEEO EEO OOO EEOE EEOO EOEE EOEO EOOE EOOO groups head set howler instructor as needed International Morse Code J2 of panel Lettering chart MESSAGE BLANK RECEPTION MESSAGE CENTER OEEO OEOE OEOO OOE OOEE OOE OOO OOEEE OOEO EOO OOO EEO OOO OOE OOOE OOOO OPERATOR CODE PRACTICE Panel plug plug in J2 plug of panel preliminary sending practice previous Unit Operations printing RADIO MESSAGE BLANK RADIO OPERATOR CODE receiving operator RECORD NO TABLE relay Rt screws sending operator sent shown in Fig standard tape student's paper STUDENTS MANUAL switch S3 switchboard table cord plug table switch telegraph key Telephone Switchboard Training Manual wax record words per minute