Balanced Feeder

Balanced feeder is the classic way to feed a balanced antenna such as a dipole. It has extremely  low loss, much lower than coax cable even at high VSWR, and so can be used for very long feeder runs. One of the most attractive features from a ham radio point of view is that it can be used to form a very efficient multi band dipole that requires no traps. Take any length of wire, cut it in half and feed it with balance line. Provided that the wire element is not too far short of a half wave at the lowest frequency, you can operate the antenna on any frequency above the lowest band. You will need to terminate it with a 4:1 balun and a short length of coax back to the transceiver. You will also need an ATU to complete the match. But the system will be very efficient and very versatile.

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