Archived posting to the Leica Users Group, 2013/01/11
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]On Jan 11, 2013, at 10:32 AM, Frank Filippone wrote: > Huh? > > Trivia..... The term "computer bug" came from this period. Caused by > cockroaches that seek out the warmth and food ( insulation) of the > electrics > ( notice, not electronics). They caused a bunch of problems back then. ( > And that was before Windows!) > > The A/C was sometimes the largest cost.... as the tubes ( what, 7,000?) > generated an enormous amount of heat, that led to failure of the tubes > themselves and the wiring and especially the capacitors. > > If you have ever seen one of these monsters you will realize the > massiveness > of an installation. Ease of replacing a tube ( if you were lucky enough to > find the one bad tube in 7,000) was not bad, but you had to find the bad > one, let stuff cool down ( and dissipate the charges of several hundred > volts on various capacitors) before starting the procedure. > > Built like tanks is more like it..... > > BTW, I learned to use the Analog Devices analog computer as an employee of > the company back in 1973. They were primarily used by scientists doing > work > with multiple polynomial equations, sometimes non-linear. Patch cords were > used to interconnect the various functions. more interesting information - thanks Regards, George Lottermoser george at imagist.com http://www.imagist.com http://www.imagist.com/blog http://www.linkedin.com/in/imagist