Yep Mike,

I well remember that modulated CW.  However, there were many times, when I
was growing up in Nebraska, that I could copy the CW part when the A M audio
just wasn't strong enough to hear.  Of course, in those days, they sent
every five minutes instead of every minute.  Talk about dedication to WWV.
I had a friend, when we were at the school for the blind, who literally
stayed up all night once and listened to WWV for eight hours straight.  When
I asked him why he did it, he said, I just wanted to hear what it was like
at night.

Phil
k0ns