Code Practice Oscillator

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  • Description
CPO - Code Practice Oscillator.  Need to learn how to use a bug without the key connected to a radio?  Our CPO is ready to use.  Includes CPO board and speaker.  Add key cable and 9V battery.  700 Hz tone from LM386 audio chip @350 mW output power.  Not an electronic keyer - for use with bugs and straight keys only.