probably a manufacturing restriction, winding machine can't handle the heavier wire, etc.

why do you care?? what's important is the coils' performance

DR EE
"¦¦¦SHAD0W¦¦¦" wrote in message news:qanug.2760$hK6.2535@trndny07...
I saw some chokes that had three wires bound togetehr at the ends (parallel) and wound five times around a toroidal core. Why would they do that? Doesn't that reduce the inductance? Why not just use one wire?