>Any device which has an unbalanced input and a balanced output
>is ipso facto a balun.
>
>There are two functions which a balun can perform. First is
>transformation from unbalanced to balanced (and vice versa).
>Second, since the device actually is a transformer, you can
>use it to transform impedance by putting a different number
>of turns on one side of the transformer as compared to the other.
There's more. There are current baluns and there are voltage baluns.
Current baluns split current and voltage baluns split voltage. The correct
type must be used based on the application (e.g. driving an antenna,
driving transistor in push pull amplifiers etc.).
73
Ed, W1AAZ
>
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