1. Yet you misspelled it.
2. Yet you called an extender a balun. Excuse me, you called it a balin (isn't that a kind of whale?).
3. Ask at remote central, don't ask Siri.

It's a bit much to think Siri can answer all questions on all topics.

In fact, I wonder if Siri might know the answer, but think that it's pronounced bay-lun, when it's bal-un... that's bal, as in balanced, and un, as in unbalanced; that's what the word comes from.

So try asking Siri about bay-luns. It would be amusing if Siri knew about baluns but didn't know how the word is pronounced!