From Richard Hess' website, 2022 Christmas Letter (link)
QUOTED from https://www.richardhess.com/family/christmas2022.pdfJohn G. McKnight (“Jay”) a giant of the magnetic recording world, died on November 5, 2022 in Cupertino, California. He worked at Ampex in the 1950s and 1960s as the art and science of audio recording was being refined. In the 1970s, he started Magnetic Reference Laboratory to provide superb audio calibration tapes. In addition, he was a great help to Richard in researching recording esoterica for his papers and blog and encouraging him in his pursuit of high-quality audio tape recovery. He will be missed.
https://peoplepill.com/people/john-g-mcknight
https://en.wikipedia.org/wiki/John_G._McKnight
What a Guy! RIP Years back there was a top manager at Intel who told me he worked at Ampex specifically in the high speed tape duplication department. "We were over 1MHz on that tape head!" I'm certain the two knew each other.