The following is from a PDP11/Mass Spec customer of mine. If anyone has any ideas for him feel free to contact either of us. I will just forward anything to him if it gets posted to me or the list. With a little direction he can run diagnostics and has available an electronics shop and decent test equipment like scopes. I don't know if they have things like logic analyzers however. ( I did not need one the one time I was on site) It even meets the 10 year rule.:) Dan ---------------- We have an X-32 computer (CPU/3), a German unix machine from 1989. This computer operates a Bruker AMX-500 NMR spectrometer. The computer is functional except that Fourier transform calculations frequently give a massive "transmitter" spike that is NOT hardware related. Although we normally do all repairs through Bruker, the director of our facility does not want to repair this problem because the computer will be replaced within a year and the instrument is functional. However, for a frequent user (me), this problem is extremely frustrating and time-consuming. The problem is almost certainly one of the three following X-32 boards: CPU board H2297 ECL 12 Memory 16MB H2271 ECL 02 Array Processor H2231 ECL 06 If anyone can help with this problem, please contact me by email. Thank you. Bill Wilson Research Scientist Bill Wilson billw(a)rice.edu Rice University, Dept. of Biochemistry MS140 6100 Main St, Houston, TX 77005-1892 http://www.bioc.rice.edu/~billw/ Tel: 713-348-4914 Fax: 713-348-5154