Single-phase generator The early generators for those single-phase traction networks are single-phase generators. Even with newer three-phase motors which were introduced to some modern trains, the single-phases transmission for traction networks survive their time and are still in use in many railways today. However, many traction power stations have replaced their generators over time to use three-phase generators and convert into single-phase for transmission. In the early development of hydroelectricity, single-phase generators played an important role in demonstrating the benefits of alternating current. In 1891, a 3,000 volts and 133 Hz single-phase generator of 100 horsepower was installed at Ames Hydroelectric Generating
Single-reed instrument Egypt include the arghul and the zummara. Examples include clarinets, saxophones, and some bagpipes. See links to other examples below. Single reed instruments fall under three Hornbostel–Sachs classes: The following is a list of clarinets and saxophones, relative to their range and key of transposition from the opposite family: Note that if one was to compare clarinets to their saxophone counterparts while considering their approximate lowest (concert) pitch†, the order would shift: Single-reed instrument A single-reed instrument is a woodwind instrument that uses only one reed to produce sound. The very earliest single-reed instruments were documented in ancient Egypt, as