Gw instek gps 2303 multiple output linear dc power supply gw instek gps 2303 p the gw instek gps 2303 is a 2 to 4 channel 180w to 200w output linear dc power supplies overload and reverse polarity protection and an output on off switch keep the gw instek gps 2303 and their load safe from unexpected conditions a high regulation 0 01 3mv and low ripple noise lt 1mvrms 5hz to 1mhz are maintained for channel 1 and 2 in constant voltage mode p p automated cooling fan speed control