[Elecraft] KAT500 update

[Ron D'Eau Claire]

Is it true that the efficiency of a balun is not affected by the impedance
of the line in which it is used? 

The justification I had seen for putting the balun at the tuner input where
it will see a load very close to 50 ohms resistive (when the tuner is
adjusted for a "match") while at the output the balun may see anything over
a huge range of impedances.

Ron AC7AC