HI all, just a quick follow-up. Recently separated (this year) after ten years flying USAF C-130s all over the world. The problem is indeed what one post mentions. The AF has yet to install SelCal on its 130 fleet. We were (and still are) forced to continuously monitor HFs that, in accordance with generally accepted government contracting practices, are of inferior quality. End result? Repeated radio calls that you can hear because the 130 crew cannot receive the reply.
Trust me, as annoying as it may be to listen to them from another aircraft, the AF crews are infinitely more annoyed...
Cheers,