TO-3 at Motorola around 1955. The lead spacing was originally intended to allow plugging the device into a then-common tube socket. The metal package can be attached to a heat sink, making it suitable for devices dissipating several watts of heat. Thermal compound is used to improve heat transfer between the device case and the heat sink. Since the device case is one of the electrical connections, an insulator may be required to electrically isolate the component from the heatsink. Insulating washers may be made of mica or other materials with good thermal conductivity. The case is used with high-power and
Celtic Connections Celtic Connections The Celtic Connections festival started in 1994 in Glasgow, Scotland, and has since been held every January. Featuring over 300 concerts, ceilidhs, talks, free events, late night sessions and workshops, the festival focuses on the roots of traditional Scottish music and also features international folk, roots and world music artists. The festival is produced and promoted by Glasgow’s Concert Halls. Donald Shaw, a founding member of Capercaillie, was appointed Celtic Connections Artistic Director in 2006. Shaw announced in February 2018 that he would be stepping aside from the role. At the core of the festival is the Education