Basetech bt 305 single output 150w variable bench power supply basetech bt 305 p the basetech bt 305 is a continuously adjustable linear dc power supply with specifications and design build quality that stretch beyond other psus in its price bracket p p both output voltage and current limit can be set independently using the front mounted dials including fine adjustment for voltage the bt 305 has two easy to read led displays showing the voltage and current output even when the psu s