Gunsmoke tops the list as the longest-running dramatic series in network television history with 635 episodes. Set in Dodge City, Kansas, during the 1870s, Gunsmoke began as a radio program in 1952, switched to the land of visual entertainment in 1955, and finally ended its 20-year run in 1975. NEXT.
Silver soldering. Hard soldering or silver soldering is used to join precious and semi-precious metals such as gold, silver, brass, and copper. The solder is usually referred to as easy, medium, or hard. This refers to its melting temperature, not the strength of the joint. Extra-easy solder contains 56% silver and has a melting point of 1,145 Â°F (618 Â°C). Extra-hard solder has 80% silver and melts at 1,370 Â°F (740 Â°C).
1 Soldering is used to form a permanent connection between electronic components. 2  The metal to be soldered is heated with a soldering iron and then solder is melted into the connection. 3  Only the solder melts, not the parts that are being soldered. This is called tinning and it will help the heat flow from the iron's tip to the joint. 2  The solder should flow onto the tip, producing a bright shiny surface. 3  If the solder will not flow onto the tip, clean it by wiping it on the wet sponge. 4  When tinned, wipe excess solder off on the wet sponge.