Icom Ct-17 Schematic Best

DIY Icom CT-17 Schematic: Build Your Own CI-V Level Converter

If you were to connect an RS-232 port directly to a radio’s CI-V port, the voltage disparity would likely fry the radio's delicate logic circuits. The CT-17 acts as a level converter. It takes the high-voltage RS-232 signals from the computer and steps them down to safe TTL levels for the radio, and vice versa. It also allows for "daisy-chaining" multiple radios to a single serial port. icom ct-17 schematic

: The schematic relies on electrolytic capacitors (often 22uF or 33uF) for the internal voltage doubler circuits of the MAX232. In older units, these are common failure points that can short out the entire interface. DIY Icom CT-17 Schematic: Build Your Own CI-V