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This project is an update to my previous keyer with currently available components. It also includes the ability to interface with just about any transmitter/transceiver in existence. The Keyer output is for modern transceivers with the keyer chip in charge of CW parameters. Paddle output is used when you want to use your transceiverís keyer. And finally, the High Voltage output is for tube rigs requiring high voltage keyer switching using the keyer chip.