Quote:
Originally Posted by TheHolyHades1
Alan, when I said "arbitrary" I was referring to this statement in the very link you posted:
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If you study the rest of the words on that page, I hope you'll see why calling it arbitrary, even in scare quotes, is simply wrong.
That incorrect statement was made in only one of the three answers. Because it was corrected by a comment on that answer, I didn't think it necessary to warn anyone following the link to disregard it. The truth remains that it is not arbitrary at all. The other two answers both explained succinctly why 120 ohms is the proper value.