Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!swrinde!elroy.jpl.nasa.gov!ncar!hsdndev!cmcl2!cmcl2.nyu.edu!freudent From: freudent@lab.ultra.nyu.edu (Eric Freudenthal) Newsgroups: sci.electronics Subject: Early CRT X-RAY Emissions Message-ID: Date: 6 Jun 91 14:03:01 GMT Sender: notes@cmcl2.nyu.edu (Notes Person) Distribution: sci Organization: New York University, Ultracomputer project Lines: 20 Nntp-Posting-Host: lab.ultra.nyu.edu I have recently acquired a motorola 17T4 (old TV in machine-age case) with a 17AP4 or 17BP4 crt. The acceleration voltage is 12KV. To my surprise, this set has minimal shielding around the rectifier tube, which raises the question in my mind whether the set pre-dates x-ray shielding. (I have heard that very early TVs were hazards). I replaced the rectifier with a diode, but am wondering if I should also shield the CRT. There is a glass faceplate in front of the tube. Thank you. Please reply by mail. ....Eric -- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Eric Freudenthal NYU Ultracompter Lab 715 Broadway, 10th floor New York, NY 10003 Phone:(212) 998-3345 work (718) 789-4486 home Email:freudent@ultra.nyu.edu