No, if you remeber the environment of the 360/370 systems was strictly controlled to avoid thermal stress and pollution. Personally in the early '70 have worked on systems with ten year of operation, without any problems related to the wrapping. My experience say that the wire wrap is more reliable. Ciao Leo -----Messaggio originale----- Da: William Chops Westfield A: PICLIST@MITVMA.MIT.EDU Data: mercoled“ 20 gennaio 1999 19.00 Oggetto: Re: [OT] Wire wrapping questions >By the way: number one "mysterious problem" in old mainframes with >wirewrapped backplanes? After 5+ years of operation, some of the wrapped >wires that were positioned against other pins would eventually have the >insulation displace enough to cause an inadvertent connection to the post! > >BillW >