[bal-uh
n] 
| a device for converting a balanced line into an unbalanced line and vice versa. |
balun electronics
A transformer connected between a balanced source or load and an unbalanced source or load. A balanced line has two conductors, with equal currents in opposite directions. The unbalanced line has just one conductor; the current in it returns via a common ground or earth path.
(1996-10-17)