hi alll. even though i'm not an aviator, i just bought a pair of DC
H10-30s for $15 and i'm exploring what else i can use them for. the plugs
are a bit of a mystery, though, so i'm hoping someone can help me figure
them out. the two-conductor one is clearly the output; i can hear through
them. but the other plug, which is presumably for the mic, has four
segments! can anyone explain what they are, or cite a jack that accepts
such a plug? i've never seen it before in my life!

thanks much.

aaron.