Negative. Others have pointed out KANO; living in Hilo I can attest
that it comes in well (in the car) south to near Volcano, east at least
as far as Pahoa, and north to around Laupahoehoe.
Um... I think PBS Hawaii is on broadcast channel 4. We have a corrugated
iron roof on our plantation house which apparently ruins reception

so
we did wind up getting cable for it.
Oh, and at least here in town there's a "more basic than basic" package
for $10 or less that gets you the broadcast channels and a few others.
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