At Texas A&M University, experimental particle physicist Dr. Rupak Mahapatra spends his days chasing some of the faintest signals in the universe. His lab designs cryogenic semiconductor detectors ...

Stamped: "Detector / Type A / No. W145 / DR. No. RW 50 A 133 A / W.N.Y. 1916". A three turret crystal detector with a 4-position sweep switch, two connecting screws ...

Marked: "The Grewal Mfg. Co. / Newark, N.J. / Pat. Pend." A crystal detector with induction coil and slider. Detector is fixed type, and has one lead to a .0005 mfd. bypass capacitor which offers a ...