Examples of balun designs Choke balun. A choke balun can be built by simply looping 8 to 10 times a coax line on itself. In fact, a choke balun is a bit of a misnomer because it doesn't actually balance the line, but does provides isolation for the transmission line. The proper name for such a device is an RF choke. 4:1 UHF baluns
As the popularity of this game grew, it was exported to other countries like Canada, Australia, Ireland and the US, who made their bit part changes to the rules. Walter Camp is widely regarded as the person who invented football in America. Walter Camp brought in some defining alterations to the traditional game of Rugby in America. American Football's governing body is known as the National Football League (NFL).
However, a different version the game caught on in medieval England and became very popular with rules and regulations soon being assigned. The English came up with the 'laws of the game' in 1863 when the Football Association was formed. A memorable part of the history of soccer came in the first world war. England and Germany were fighting on the Western front until Christmas Eve 1915 when a temporary truce took place between the countries. From somewhere a 'football' was thrown out and both Englishmen and the Germans began a free-for-all soccer game.