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Explains AC line voltage, transformer, fuse, and voltage regulation for positive and negative DC supplies.
Describes how the key lever actuates switches S1 and S2 to control the dot and dash generator circuits.
Explains how transistor Q3 prevents the dot generator from activating when the key is neutral.
Explains how transistor Q6 prevents the flip-flop multivibrator from switching when the key is in the dot position.
Describes the non-oscillating Q4/Q5 flip-flop circuit that requires external pulses to switch states.
Explains how transistor Q11 starts the audio multivibrator when activated by dot or dash signals.
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General