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June 2005

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Subject:
From:
"Ingemar Hernefjord (KC/EMW)" <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Ingemar Hernefjord (KC/EMW)
Date:
Fri, 3 Jun 2005 08:56:01 +0200
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The younger mates are so serious and selfcontrolled today. We used to have more fun on the job when young. Like this one.
We used a 30 kV DC supply with 100 meg in series, put finger on, and charged ourselves to plus 30,000 V. You needed thick rubber shoes of course. Walked out to coffee machine or else, met comrade, pointed at his nose and said 'you got something there' and touched his nose. The result was a audiable flash, a shriek, and then you had to defend yourself when the victim hammered on you. We modified the game. Connected the supply to the steal frame of the lab benches. When the chosen object sat down and rolled his chair near the bench, you heard the scream through walls. Next modification could stopped with a disaster. We connected 30,000 Volts to the door handle,and amused every time a selected poor guy jumped high by the flashover. However, one day, we forgot to remove the croc connector from handle, there was a knocking, the handle went down and a bounce on outside. And silence. Someone opened the door, and on outside was a shaky, stammering old postman, retired but doing some extra job as elder. We got frightened and asked him what happened. He looked angrily on us, picked up the post from the floor and said "Nothing. Nothing at all" and left. The supply was never used that way any more.

Used battery gun. We found a whole bunch of used handtorch batteries and 10 feet long plastic tubes and other stuff, left by electricians after house repair. One guy looked thoughtfully on the stuff, took a battery, put it into the end of a plastic tube, went to an open window, grasped a pressurised air pistol and pressed it into the plastic tube, elevated the tube and pressed the "trigger" and off went the battery and landed some 50 meters away. We improved the version, threedoubled the pressure and the whole thing ended in a game to see who could get most batteries into a steel container 100 meters away.

When television was not allowed on the job. Winter olympic game time and work without knowing what happened. Unacceptable! A guy opened his Tektronix oscilloscope, worked hard on overtime, and after couple of days he was ready. All engineers were gathered in their white coats around the test equipments. The boss appeared wondering why so many guys,  looked over shoulders and saw green sweeps on a  number of CRTs. "Good, they are working hard on the new TWT", he said to the next boss and they left, and closed door. With some simple switch maneuvres on the oscilloscopes, the athletics from the olympic games appeared on the little CRT. Green, everything green, but what...no worries..we could at least see and listen. As soon as a higher-in-rank appeared, someone whistled and..alas..a concentrated group of engineers working hard...

Soldering iron shooting game. We put a number of 150 Watt soldering irons in vices. Removed copper tip and filled the cavity with the tips from ordinary matches and pressed the copper back into the iron. All electric connectors were plugged into a multipanel with a common switch. All went out, last guy triggered the switch, and we waited. After some minutes something like a machinegun was heard, we opened the door and inspected the wooden wall to see who's copper tip had penetrated deepest into the wood panel.

Nuts? Idiotic?...yes...but we had fun.

Ingemar Hernefjord
Ericsson Microwave Systems

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