In the early 70's I loved The Amateur Scientist, "conducted" by C. L. Stong. Great articles, with real technical details, giving you a real chance to build real equipment. To pick one article at random, from February 1972: "A Simple Laser Interferometer, an Inexpensive Infrared Viewer and Simulated Chromatograms". Very, very cool.

There's nothing like that out there now.