Summary of Contents for DATONG MORSE TUTOR D70
- Page 2 OF A SWITCH, PLUS BUILT-IN OSCILLATOR FOR SENDING PRACTICE. HOW TO LEARN MORSE WITH THE DATONG TUTOR Sends a continuous stream of precision Morse The key to learning Morse is to learn each character as a in five character groups which never repeat.
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Page 3: Audio Note
A ·- N -· 1 ·---- AUDIO NOTE The frequency of the audio tone can be altered if desired B -··· O --- 2 ··--- by adjusting the preset potentiometer labelled 'NOTE' on C -·-· P ·--· 3 ···-- the printed circuit board. To open proceed as described D –.. -
Page 4: Service Information
SERVICE INFORMATION MODEL D70 THE CIRCUIT AND SERVICE INFORMATION SUPPLIED IS CONFIDENTAL AND FOR USE BY DATONG AGENS ONLY. 1. Refer also to circuit diagram, data sheet, PCB layout. 2. Dismantling Remove the eight screws holding both front and rear panels. - Page 5 required for IC8 and IC9(a) to self reload to 26. Any fault in this resetting will cause adress zero to be accessed and this will produce the illegal character da-dah-dah-dah. With number generation IC9(a) remains held with pin 1 high and IC8 counts down from 26 to 17.