ORYSTAL_CONTROLLED_CODE_PRACTICE_TRANSMITTER

Published:2009/7/12 20:39:00 Author:May | From:SeekIC

When the CW key is closed, IC1-a's output goes high, allowing IC1-b and IC1-c to oscillate. The crystal supplies the feedback path setting the oscillator's operating frequency. The circuit will operate on the 40- and 80-m bands. Section IC1-d isolates the oscillator from the short antenna, ANT1. A clip lead should do here to get the signal out and about for operation. Tune your ham-band receiver to the crystal's frequency and key down. If the receiver doesn't have a CW mode, turn on the BFO and tune for the desired CW tone.



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