What type of heat source is typically used in soldering?

In soldering, a flame torch is a commonly used heat source due to its ability to provide focused and adjustable heat to specific areas. A flame torch creates an intense heat that can quickly melt solder and allow for effective joining of metals, especially in applications where deep penetration of heat is required or where the components are heavy and require more substantial heating for successful soldering.

The flame from a torch can also be easily directed and controlled, making it suitable for various tasks in soldering. Additionally, the versatility of flame torches allows them to work on different types of materials, which is beneficial in situations where various metals need to be joined.

While there are other heat sources like electric heaters, induction heaters, and hot air guns that may be used in different soldering applications, the flame torch remains a popular choice especially in traditional soldering methods where rapid heating is essential.