Reply to post: Anti-static.....

Fresh cotton underpants fix series of mysterious mainframe crashes

Peter Christy


"In a far galaxy, a long time ago"... I was helping out a friend who manufactured radio control gear. The American designs he was using were well past their sell-by date, and I offered to design something a bit more up-to-date for him. My design entailed the use of new-fangled CMOS chips in the decoder, so I duly gave him the traditional warnings about static, etc, when assembling them. A week or two after my system had entered production, I went round to his factory, and found him sitting at his workbench soldering in the chips, wearing nothing but his cotton shorts!

Not a pretty sight, but at least he'd listened to what I told him!

Around the same time, I worked in the videotape department of a major broadcaster. The old quadruplex VTRs were monsters that cost around 3 times as much as a small semi-detached house. The video heads only lasted about 200 hours before requiring a re-work at £1000 a throw. The company had replaced the worn out "computer" floor tiles, and the new ones were causing enormous static build ups. You only had to walk across the booth to get an almighty belt when you touched the machine.

The solution was an aerosol can of anti-static spray, which you sprayed over the floor and your trouser legs to reduce the static build up. This worked a treat! Unfortunately, the anti--static spray was in orange cans, almost identical in appearance to the cleaning agent used to clean the video heads on the VTRs! The anti-static stuff had the unfortunate property of completely stripping the insulation off the delicate heads.

I'm not sure how many heads got destroyed before all the anti-static sprays were removed, but even if it were only a few, the expense must have been enormous.......



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