Hard Sky – Fifty Years Later

Interesting that the “Hard Sky” of 1958 coincided with the creation of the first working integrated circuit. While “dumpster diving” in the vastness of the newly available QST archive, I ran across “After Sunpots, What” by W6NLZ (ARRL members only). There has been an additional 50 years of observations since then, but it is an interesting perspective on which to becomeacquainted.

This bottomless pit of QST history is pretty interesting too.