Re: Magnetics testing
Hi All, A better place would be inside an aluminum smelting plant. The pot lines use a voltage of 600v with an amperage 0f 100,000 amps. Lots of gauss there. I once worked as an engineer on a pot line and none of my mechanical watches would keep proper time because of the magnetic fields. Thanks Jim Freeman Scott Douglas wrote: > Lisa, > > Gee, could you maybe talk to your local power company and set up inside one > of their local distribution stations? With all those transformers, high > voltages and currents, I would think 80 gauss would be easy to find? > > Scott > > At 11:13 AM 6/13/02 -0500, Ken Javor wrote: > > >I don't know labs who does this kind of work, but I don't think the original > >request is that "out there." I think more info is needed (at least by me). > >If this is at 50/60 Hz, I don't think it is that bad. Looks like around 100 > >Amps would be necessary. Not your typical Helmholtz coil, but not outside > >the bounds of reality. Depends a lot on the size of the test item. If it > >is small compared to a breadbox, then the 100 Amp number could come down > >substantially. > > > >-- > > >From: Mike Cantwell > > >To: emc-p...@majordomo.ieee.org > > >Subject: RE: Magnetics testing > > >Date: Thu, Jun 13, 2002, 9:08 AM > > > > > > > > > > > > > > 30 to 80 Gauss is equivalent to about 6500 A/m. This is an enormous > > field!!! > > > > > > Do you have the right units? > > > > > > > > > > > > -Original Message- > > > From: lisa_cef...@mksinst.com [mailto:lisa_cef...@mksinst.com] > > > Sent: Thursday, June 13, 2002 6:40 AM > > > To: emc-p...@majordomo.ieee.org > > > Subject: Magnetics testing > > > > > > > > > > > > Hello All, > > > > > > I am wondering if anyone knows of a test lab in the northeast capable of > > > generating a magnetic field strength of 30 to 80 Gauss? > > > > > > thanks > > > > > > Regards, > > > > > > Lisa > > > > > > Lisa A. Cefalo, CRE > > > Manager, Reliability and Design Services > > > MKS Instruments > > > (978)-975-2350 X 5669 > > > lisa_cef...@mksinst.com > > > > > > > > > --- > > > This message is from the IEEE EMC Society Product Safety > > > Technical Committee emc-pstc discussion list. > > > > > > Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ > > > > > > To cancel your subscription, send mail to: > > > majord...@ieee.org > > > with the single line: > > > unsubscribe emc-pstc > > > > > > For help, send mail to the list administrators: > > > Ron Pickard: emc-p...@hypercom.com > > > Dave Heald: davehe...@attbi.com > > > > > > For policy questions, send mail to: > > > Richard Nute: ri...@ieee.org > > > Jim Bacher: j.bac...@ieee.org > > > > > > All emc-pstc postings are archived and searchable on the web at: > > > http://ieeepstc.mindcruiser.com/ > > > Click on "browse" and then "emc-pstc mailing list" > > > > > > --- > > > This message is from the IEEE EMC Society Product Safety > > > Technical Committee emc-pstc discussion list. > > > > > > Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ > > > > > > To cancel your subscription, send mail to: > > > majord...@ieee.org > > > with the single line: > > > unsubscribe emc-pstc > > > > > > For help, send mail to the list administrators: > > > Ron Pickard: emc-p...@hypercom.com > > > Dave Heald: davehe...@attbi.com > > > > > > For policy questions, send mail to: > > > Richard Nute: ri...@ieee.org > > > Jim Bacher: j.bac...@ieee.org > > > > > > All emc-pstc postings are archived and searchable on the web at: > > > http://ieeepstc.mindcruiser.com/ > > > Click on "browse" and then "emc-pstc mailing list" > > > > > > >--- > >This message is from the IEEE EMC Society Product Safety > >Technical Committee emc-pstc discussion list. > > > &
Re: Surplus EMC Test Equipment available
Hi All, I for one am very happy about this posting. A deal on some equipment that is useful but not required is appreciated. Thanks Jim Freeman kazimier_gawrzy...@dell.com wrote: > I'm planning a garage sale sooncan I post a list too?My > opinion and not that of my employer.Regards,Kaz Gawrzyjal > -Original Message- > From: Michael Taylor [mailto:mtay...@hach.com] > Sent: Wednesday, May 15, 2002 6:00 PM > To: 'emc-p...@ieee.org' > Subject: Surplus EMC Test Equipment available > > Greetings all. Risking the wrath of some list members, I am posting a > list of surplus EMC test equipment. I hope no one takes this as a > business offering, which it is not. > > I would prefer these items to go to a working lab instead of just > being sold off to a broker. > The recent assimilation of another company into the Danaher Corp. > Collective has resulted in several EMC Test equipment items declared > surplus. > > These items are all in like new condition and guaranteed working to > spec. > If anyone has any interest in these items please contact me off-line. > No reasonable offer refused. > Below is a list of items. (with the understanding the list is > preliminary and may change subject to upper management decisions over > which I have no control) > > Items 1 & 2 are available now. Items 3-14 will not be available for > 30-35 days. (I was directed to list them now) > Thank you for your understanding in this listing. > Michael Taylor > Colorado > mtay...@hach.com > 970-663-1377 ext 2646 > > <<<< items available now >>>>> > 1. Lindgren shield room (2 years old) 16' L x 12' W x 10' H w/ 4' door > (unlined), 2x 30A filters & two 12" wave guide air vents. > > Buyer responsible for disassembly & removal prior to 7/30/02. > Located in Wisconsin. > 2. TEM Cell, Voltek "G-STRIP" 4'x4'x4' in good condition. > > <<<< the following are scheduled for surplus in the next 30 days.>>>> > 3. Schaffner NSG 1025 EFT/Surge Generator w/ 2 CDN's > 4. Schaffner CDN-125 EFT Coupling Clamp > 5. EMCO 20A LISN > 6. SOLAR 24A LISN > 7. Chase MA2050B LISN > 8. KeyTek Mini-Zap ESD gun (complete kit) > 9. Advantest 3 Ghz Spectrum analyzer > 10. HP L1500 / 4401A 1.5 Ghz Spectrum Analyzer > 11. HP 7 series System Spectrum Analyzer (a great system EMC > Analyzer for an automated test system) > w/ 70206A Graphics Display unit > 70001A Mainframe > 70300A Tracking Gen. > 70621A Preamp (10Hz-3 Ghz) > 70904A RF Section > 70400A Local Osc. > 70902A IF (10Hz-300Khz) > 70903A IF (100Khz-3Mhz) > 12. HP 8648A Signal Gen. (9K-1Ghz) > 13. Marconi Signal Gen. 2022E (9K-1Ghz) > 14. Elgar, SW-5250 Programmable AC Power Source, 40Hz-400Hz 3phase > @1750VA/phase (can be ganged for 18A -1 phase @ 366V) for harmonics, > flicker, & Power Qual. > > 15 Fischer Communications, model BCICF-1, Injection Clamp > Calibration Fixture. > end of list
Re: Some slightly disturbing interview news ...
Hi All, I have heard of this and know that it is performed as an information gathering tool. A company usually employs their own engineer designate(the most politically correct engineer that has any brains) and puts him on all the interview lists. This person writes reports as to what is being done outside and then the managers use this database to question their internal experts about why they are doing things a certain way,. Keep in mind that the managers have no idea how or what it takes to solve the problem but use the database to badger internal people and force them to investigate a problem in a way that doesn't match their skill set while at the same time expressing disappointment at how the job isn't getting done in a timely manner because of the insuficiency of expertise in the internal people. The internal person may even on the right track but will be forced off of it befause of management pressure. Another time I was actually queried about the values for particular constants and watched the politically correct engineer write down the answers in my presence. This was a case of a not particularly bright politically correct engineer. Thanks Jim Freeman Berkley wrote: > This is nothing new.. I found this to be typical interviewing technique at > several start-ups that I had interviewed with over the past 3-4 years. The > questioning would get extremely detailed, and in my opinion, way too focused > (for a first interview). I learned to recognize some tell-tale signs.. for > instance, where my most of my responses to specific questions got an > immediate reaction like " but what if you already tried that and it didn't > work? .. what else would you do"... and the questioning would proceed way > down, into the micro-level on this one problem. > > It was so blatant at one interview that, after a grueling 2 hours, I finally > stood up and said "hire me and you'll find out", then walked out. They > called me back for a second interview! .. I kindly declined.. > > Be Good, > George > > - Original Message - > From: "Ken Javor" > To: "Doug McKean" ; "EMC-PSTC Discussion Group" > > Sent: Thursday, May 16, 2002 12:54 AM > Subject: Re: Some slightly disturbing interview news ... > > > > > Happened to me personally, but not in Silly Valley. > > > > -- > > >From: "Doug McKean" > > >To: "EMC-PSTC Discussion Group" > > >Subject: Some slightly disturbing interview news ... > > >Date: Wed, May 15, 2002, 6:45 PM > > > > > > > > > > > Times are tough all round but there's no need to > > > make things tougher. Here in Silly Valley, things > > > are tough and I have made some attempts to > > > find a few people jobs in my spare time. These > > > are people I know personally. I'm sure I'm > > > not alone in this venture. I'm sure most if not > > > everyone on this list would also help. > > > > > > One headhunter who called me wanted to know if > > > I was just plain nuts or just some sort of a good guy > > > handing a job offer off to someone I knew who was > > > looking. I told him it was none of his business , > > > just make sure to give so-and-so a call. Which they do. > > > > > > Unfortunately, what I have personally experienced > > > in the past (rarely), and what appears to be happening > > > at least with a few of companies currently is the following ... > > > > > > EMC job opening is posted. Resumes are sent. > > > A few candidates are selected for interviews. > > > Most of the interview centers on questions about > > > how to solve some problems that are being > > > experienced by said company. Then there's a > > > decision not to hire anyone. Purchase req for > > > new hires is closed. All candidates are rejected. > > > > > > A few months later, same company goes through > > > the whole thing again. Only this time, there's a > > > different set of questions to problems all being > > > experienced by said company. Both sets of questions > > > involving "how-would-you-solve-this" type of problems. > > > > > > I'm sure most of you know where I'm going with this. > > > At the end of the day, the company or whoever in the > > > company, has their solution or solutions. > > > > > > I'm not crying about this. My questions are ... > > > Comes with the turf? > > > Are you surprised to hear such a thing? > > > Not surprised? > &
Re: stun guns on aircraft
I don't feel embarassed. As a matter of fact, I feel proud that the US has found a medium between suppression and freedom of expression. How come every one in the world looks to the US for leadership in conflicts? Probably because the ROW(rest of world) has never figured it out. Jim Freeman Robert Wilson wrote: > "Free men own guns". Yeah right. The true mark of a civilized country is > that its citizens all own guns. Never been anywhere else, have you? It > is just this sort if immature 19th century frontier mentality that is > embarrassing the US in the eyes of the rest of the world. > > Bob Wilson > TIR Systems Ltd. > Vancouver. > > -Original Message- > From: Pettit, Ghery [mailto:ghery.pet...@intel.com] > Sent: May 6, 2002 4:24 PM > To: 'Ted Rook'; < > Subject: RE: stun guns on aircraft > > I've resisted jumping in in this fashion, but - > > FREE MEN OWN GUNS! > > Those who will trade essential freedoms for temporary security deserve > neither - Benjamin Franklin. > > Folks, the 2nd Amendment pre-dates the wild west by a long time. Those > of > us who value our RIGHTS are tired of the wimps in the world trying to > take > them away. > > Ghery S. Pettit > Life Member, National Rifle Association > > -Original Message- > From: Ted Rook [mailto:t...@crestaudio.com] > Sent: Monday, May 06, 2002 1:08 PM > To: < > Subject: stun guns on aircraft > > and other safety considerations > > keep the hijackers off planes using ground security > > an airplane in flight is not the place to have gun fights > > too many lives are at risk > > the first priority is to get the plane safely on the ground, anywhere > > then at least the passengers have a chance > > Most citizens of most countries enjoy the security that comes from > having > thrashed out land rights, territorial disputes, and the systems of law > and > law enforcement before firearms were invented. > > America is one of the few places in the West that relies on firearms as > a > negotiating tool. > This is poor judgement. > Firearms are offensive weapons not negotiating tools. > Giving someone a gun escalates an already dangerous situation. > Now you want the pilot to not only assure the safety of the plane but > also > be an effective executioner. > Asking too much IMHO. > Unfortunately America was taken by force and is defended by force and is > unlikely ever to change. > > --- > This message is from the IEEE EMC Society Product Safety > Technical Committee emc-pstc discussion list. > > Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ > > To cancel your subscription, send mail to: > majord...@ieee.org > with the single line: > unsubscribe emc-pstc > > For help, send mail to the list administrators: > Ron Pickard: emc-p...@hypercom.com > Dave Heald: davehe...@attbi.com > > For policy questions, send mail to: > Richard Nute: ri...@ieee.org > Jim Bacher: j.bac...@ieee.org > > All emc-pstc postings are archived and searchable on the web at: > http://ieeepstc.mindcruiser.com/ > Click on "browse" and then "emc-pstc mailing list" > > --- > This message is from the IEEE EMC Society Product Safety > Technical Committee emc-pstc discussion list. > > Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ > > To cancel your subscription, send mail to: > majord...@ieee.org > with the single line: > unsubscribe emc-pstc > > For help, send mail to the list administrators: > Ron Pickard: emc-p...@hypercom.com > Dave Heald: davehe...@attbi.com > > For policy questions, send mail to: > Richard Nute: ri...@ieee.org > Jim Bacher: j.bac...@ieee.org > > All emc-pstc postings are archived and searchable on the web at: > http://ieeepstc.mindcruiser.com/ > Click on "browse" and then "emc-pstc mailing list" > > --- > This message is from the IEEE EMC Society Product Safety > Technical Committee emc-pstc discussion list. > > Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ > > To cancel your subscription, send mail to: > majord...@ieee.org > with the single line: > unsubscribe emc-pstc > > For help, send mail to the list administrators: > Ron Pickard: emc-p...@hypercom.com > Dave Heald: davehe...@attbi.com > > For poli
Alpha particles
Hi All, I am trying to calibrate Alpha Particles to the charge that they generate in a semiconductor. If anybody can help me with the energy of the Alpha Particle(I think 1Mev), the number of electron-hole pairs generated per Alpha particle in the junction or the bulk, and some ideas on how to convert Alpha particles counts per hour(cph) to Failures in time(FIT) rate. we a re employing a bump technology for our product and this could be of concern. The Vendor has given us some FIT rates and I would like to correlate that to the cph( also given) I have the geometries involved but there may be some that I have not considered. Thanks Jim Freeman --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server.
Re: radar
I didn't know that there were any speed limits in Germany. Jim Freeman Lothar Schmidt wrote: > There are even better systems on the market. The German police use > systems which show the driver very clearly by placing the cameras so, > that it takes the front of the car.So please smile if you drive too > fast Best RegardsLothar Schmidt > > Technical Manager EMC/Radio > BQB > CETECOM Inc. > 411 Dixon Landing Road > Milpitas, CA 95035 > ( +1 408 586 6214 > Ê +1 408 586 6299 > > -Original Message- > From: kazimier_gawrzy...@dell.com > [mailto:kazimier_gawrzy...@dell.com] > Sent: Tuesday, January 08, 2002 1:09 PM > To: ghery.pet...@intel.com; nickjro...@cs.com; > emc-p...@majordomo.ieee.org > Subject: RE: radar > > My own experience with photo radar showed a very clear > picture of the rear of the car, showing the license plate > and also a good view of the back of my head. No court > summons was involved as I did not attempt to fight it. The > ticket went out to the registered owner of the vehicle...not > the driver hence no insurance impact.My two cent and and not > that of my employer,Regards,Kaz GawrzyjalDell > -Original Message- > From: Pettit, Ghery [mailto:ghery.pet...@intel.com] > Sent: Tuesday, January 08, 2002 2:34 PM > To: 'Nick Rouse'; emc > Subject: RE: radar > > Does the photo show who was driving the car? Can't say that > I would be too happy to be summoned to court when one of my > kids (or wife) was speeding.Ghery Pettit > -Original Message- > From: Nick Rouse [mailto:nickjro...@cs.com] > Sent: Tuesday, January 08, 2002 12:03 PM > To: emc > Subject: Re: radar > > I don't know if the technique is used in America but the > speed cameras in the UK are triggered by radar but produce > evidence by taking two pictures illuminated by two strobe > pulses timed about 150ms apart. Stripes are painted across > the road spaced so that between flashes a vehicle will > traverse one stripe pitch for every 10mph.If the pictures > show you have traversed more than 7 stripe pitches (on > motorways)you will receive copies of these photos together > with a summons to appear in court.Nick Rouse >Jim > Freeman wrote: > > > >Hi All, > > > I apologize for being off subject but I was driving to > > work and > > >noticed aCalifornia Highway Patrol officer on the > > opposite of the > > >freeway an about 500 yards away. What brought him to my > > attention was > > >what appeared to be a strobe light that was flashing. I > > have been > > >thinking about and I was wondering if the new radar has > > some ways of > > >taking pictures or if the strobe light really is the > > radar source. Any > > >help would be appreciated. > > > > >Thanks > > >Jim Freeman > > > Hi All, > > I apologize for being off subject > > but I was driving to work and > > noticed aCalifornia Highway Patrol > > officer on the opposite of the > > freeway an about 500 yards away. What > > brought him to my attention was > > what appeared to be a strobe light > > that was flashing. I have been > > thinking about and I was wondering if > > the new radar has some ways of > > taking pictures or if the strobe light > > really is the radar source. Any > > help would be appreciated. > > > > Thanks > > Jim Freeman >
radar
Hi All, I apologize for being off subject but I was driving to work and noticed aCalifornia Highway Patrol officer on the opposite of the freeway an about 500 yards away. What brought him to my attention was what appeared to be a strobe light that was flashing. I have been thinking about and I was wondering if the new radar has some ways of taking pictures or if the strobe light really is the radar source. Any help would be appreciated. Thanks Jim Freeman --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server.
Re: EMC-related safety issues
Hi Ken,
The reason that those companies stopped was because it was found
that there was mercury in the formulation of the vaccine. The mercury
had no other use other than stabilization. The mercury is known to
cause brain damage. Prior to around 1980, DPT was not given to infants.
The rise in autism has correlated with the increased use of the infant
vaccines.Those companies were also found to have poor process control
that allowed too much of a live virus in their vaccines causing a
so-called 'hot batch'. The company that is left doesn't have mercury in
their formulation and has superior process control. I would much rather
see my child suffer through a virus than be permanently brain
damaged(usually undetectably)
BTW, whooping cough and pertusis are the same thing. the D stands
for Diptheria.
Jim Freeman
Ken Javor wrote:
> My take on it is that rather than appease ridiculous demands, a
> company ought to look at the profit vs. risk vs. cost to consumer and
> decide, heck, it ain't worth it. Case in point on the news today I
> heard that DPT shots are in short supply, because two companies quit
> making it. They quit making it because there were a very small number
> of bad reactions to it and there were lawsuits or gov't action. Well,
> my kids are beyond that stage but I sure feel sorry for the people out
> there whose infants are at risk for whooping cough, diphtheria and
> pertussis. The only thing worse than watching your child become
> seriously ill is knowing it was easily preventable.
>
>
> S on 1/4/02 7:37 AM, cherryclo...@aol.com at cherryclo...@aol.com
> wrote:
>
>
> Hey, Ken, let's try to be realistic here!
>
> Sure - we should try to get laws we don't like changed, but
> that isn't going to happen overnight and in the meantime we
> have to operate within the law as it stands.
>
> Or are you suggesting immediate insurrection by product
> manufacturers?
> (Outlaw manufacturers roaming the wild wild west - an
> interesting concept!)
>
> The IEE's guide on EMC and Functional Safety is concerned
> with such legal aspects, but is also concerned with saving
> lives in a world where electronic control of safety-related
> functions is proliferating madly.
>
> As my paper at the IEEE's EMC Symposium in Montreal and my
> recent article in ITEM UPDATE 2001 show - at present EMC
> standards don't address safety issues, and most safety
> standards don't address EMC-related functional safety
> issues.
>
> Regards, Keith Armstrong
>
> In a message dated 03/01/02 17:24:42 GMT Standard Time,
> ken.ja...@emccompliance.com writes:
>
>
> Subj:Re: EMC-related safety issues
> Date:03/01/02 17:24:42 GMT Standard Time
> From:ken.ja...@emccompliance.com (Ken Javor)
> Sender:owner-emc-p...@majordomo.ieee.org
> Reply-to: ken.ja...@emccompliance.com (Ken Javor)
>
> To:c...@dolby.co.uk (James, Chris),
> acar...@uk.xyratex.com ('acar...@uk.xyratex.com'),
> emc-p...@majordomo.ieee.org
>
>
>
>
> There is an inherent contradiction in this
> anti-profit, anti-technology point-of-view that I
> cannot and will not defend. All I am saying is
> that people who feel this is wrong should stand up
> and say so, not write guides for how to go along
> with it.
>
Re: [Fwd: Who or what is W letter in a circle]
As I remember it, this is for Westinghouse corporation that has since been broken up and is almost in oblivion. Thanks Jim Freeman David Heald wrote: > Forwarded for Paul Smith. Please CC:paul_j_sm...@teradyne.com on any > relpies. > > Dave Heald > EMC-PSTC Admin > > Original Message > Subject: Who or what is W letter in a circle > Date: Mon, 10 Dec 2001 15:33:29 -0500 > From: paul_j_sm...@teradyne.com > To: emc-p...@majordomo.ieee.org > > Folks, > > Is anyone familiar with Who or what is W symbol in a circle? > Your commnets would be appreciated. > > Paul J Smith, Teradyne, Boston > > --- > This message is from the IEEE EMC Society Product Safety > Technical Committee emc-pstc discussion list. > > Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ > > To cancel your subscription, send mail to: > majord...@ieee.org > with the single line: > unsubscribe emc-pstc > > For help, send mail to the list administrators: > Michael Garretson:pstc_ad...@garretson.org > Dave Healddavehe...@mediaone.net > > For policy questions, send mail to: > Richard Nute: ri...@ieee.org > Jim Bacher: j.bac...@ieee.org > > All emc-pstc postings are archived and searchable on the web at: > No longer online until our new server is brought online and the old > messages are imported into the new server. --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server.
Re: Chris' humorous story is true!
This story is true but I heard that it was not Henry ford but Chicago Edison who was having problems and the consulting Engineer was Steinmetz. This was talked about in our Engineering 100 course at Purdue. Jim Freeman Rich Nute wrote: > Hello from San Diego: > > One of my colleagues has added material of interest to > one of Chris Allen's humorous stories. > > Best regards, > Rich > > This is actually a true story (with some adjustment). It happened at a Ford > plant back in the 1930's (which makes the $50K fee all the more > significant). The engineer was brought over from Germany to fix the > problem, and Henry Ford was appreciative of the service, but outraged with > the bill. Thus he demanded an itemization of it thinking he could out one > over on this engineer and reduce the amount. And he did, in fact get the > itemization below. Henry Ford paid the bill. > > Mario Raia > 10319 SE 15th Street, Suite 100 > Vancouver, WA 98664 > 360-891-6113 > 360-891-6114 Fax > mr...@ipinc.net Email > > > > > Comprehending Engineers-Take 2 > > > > There was an engineer who had an exceptional gift for fixing all things > > mechanical. After serving his company loyally for over 30 years, he > > happily > > retired. Several years later the company contacted him regarding a > > seemingly > > impossible problem they were having with one of their multimillion dollar > > machines. They had tried everything and everyone else to get the machine > > to > > work but to no avail. In desperation, they called on the retired engineer > > who had solved so many of their problems in the past. > > The engineer reluctantly took the challenge. He spent a day studying the > > huge machine. At the end of the day, he marked a small "x" in chalk on a > > particular component of the machine and stated, "This is where your > > problem > > is". > > The part was replaced and the machine worked perfectly again. The company > > received a bill for $50,000 from the engineer for his service. They > > demanded > > an itemised accounting of his charges. The engineer responded briefly: > >One chalk mark $1 > >Knowing where to put it $49,999 > > --- > This message is from the IEEE EMC Society Product Safety > Technical Committee emc-pstc discussion list. > > Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ > > To cancel your subscription, send mail to: > majord...@ieee.org > with the single line: > unsubscribe emc-pstc > > For help, send mail to the list administrators: > Michael Garretson:pstc_ad...@garretson.org > Dave Healddavehe...@mediaone.net > > For policy questions, send mail to: > Richard Nute: ri...@ieee.org > Jim Bacher: j.bac...@ieee.org > > All emc-pstc postings are archived and searchable on the web at: > http://www.rcic.com/ click on "Virtual Conference Hall," --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://www.rcic.com/ click on "Virtual Conference Hall,"
Re: Speed Measuring Devices
actually, with the judges i've seen you would fit right in as an unfair and partial to his own interests type of judge. Jim Freeman "Maxwell, Chris" wrote: > Maybe the only thing in need of calibration here is our collective > conscience and our speedometers. > > I thought the purpose of laws, radar guns, speeding tickets ... was for the > public good, not so that we could invent the most clever way to avoid > getting caught. It may be an interesting intellectual exercise, but I don't > know if it's worth the effort. I also don't know if it merits the attention > of this forum. > > If I were a judge, I'd start charging by the hour if I had to listen to all > sorts of "what if" scenarios. If the "what if's" didn't pan out, I'd triple > the fine just for wasting my time. (I guess that's why I'm not a judge :-) > > > -Original Message- > > From: Price, Ed [SMTP:ed.pr...@cubic.com] > > Sent: Thursday, November 16, 2000 8:04 PM > > To: 'Peter Merguerian'; emc-p...@majordomo.ieee.org > > Subject: RE: Speed Measuring Devices > > > > > > Peter: > > > > The best chance to win is through a technicality. Look for errors on the > > officer's report; time, date, road conditions, traffic, license #. Also, > > there's the possibility that the officer may not show up in court, and you > > win by default. > > > > If you search the web about "police radar", you will find several sites > > which offer detailed commentary on the legal points of officer training, > > experience, observation of the infraction, etc. Unfortunately, this may > > all > > have little bearing on Isreali civil jurisdiction. > > > > BTW, USA radars come with a printed, signed C of C attesting to the > > calibration. No idea what the recommended cal interval is. I have a Kustom > > K-1 X-band unit, and it also came with a little tuning fork (also with > > it's > > own C of C). When struck, and held in front of the radar horn, the fork > > tines physically move back and forth at a velocity equal to 50 MPH. Thus, > > a > > field check simply involves striking the fork and demonstrating an > > indicated > > 50 MPH. > > > > FWIW, I have never had this unit read incorrectly. It's sensitive enough > > to > > clock a car at one kilometer, or a human walking at about 200 meters. I > > have > > deliberately tried to induce error in it with a cell phone, amateur > > 2-meter > > 7 watt transceiver and a 5 watt CB 11-meter transceiver. (Guess you don't > > want this testimony!) > > > > I have always thought, if I felt like really sticking my neck out, that I > > would try to get the radar unit impounded as evidence until the trial. > > After > > all, the ultimate witness against you is one person swearing that they > > operated a meter correctly. That meter is now evidence against you, and > > it's > > condition must be preserved for your inspection at trial. (If a pistol is > > obtained from an investigation scene, it's impounded as evidence. So why > > not > > a Doppler radar?) > > > > The tactic here isn't fair; it's economic blackmail. A radar is sold to a > > municipality as a an enforcement tool, which just happens to pay for > > itself > > and go on making bundles of bucks (shekels?) How long till your trial? How > > long will the municipality be denied the use of the radar? How much money > > per day? How many continuations can you get? Your hope is that they decide > > that you aren't worth the loss of the revenue stream. > > > > Let us know if you need to change you email address for a while. > > > > Ed > > > > > > Ed Price > > ed.pr...@cubic.com > > Electromagnetic Compatibility Lab > > Cubic Defense Systems > > San Diego, CA. USA > > 858-505-2780 (Voice) > > 858-505-1583 (Fax) > > Military & Avionics EMC Services Is Our Specialty > > Shake-Bake-Shock - Metrology - Reliability Analysis > > > > > > -Original Message- > > From: Peter Merguerian [mailto:pmerguer...@itl.co.il] > > Sent: Thursday, November 16, 2000 6:28 AM > > To: emc-p...@majordomo.ieee.org > > Subject: Speed Measuring Devices > > > > > > > > Dear All, > > > > Yes, I did get a speeding ticket today! I am not sure if I was speeding or > > not - I do not have my eyes on the speedometer all the time! I asked the > > policewoman to show me the ca
Re: PCB fuse trace
Hi Peter, The simple metal tubes are a vacumn and the metal isn't surrounded by volatile material as it is in the PCN trace. Jim Freeman Peter Tarver wrote: > > > Jim - > > Except for when a high breaking capacity fuse is needed, arc > extinguishing fillers, like sand, are not generally necessary. I > would also expect that such a fuse would not be in a primary circuit, > where the US safety standard expects a fuse to see 10kA for miniature > fuses. Even most of these fuses (again, in the US) don't use arc > extinguishing fillers, but are simple glass tubes with metal ferrules > (the 1" by 1-1/4" miniature fuses, and even several varieties of 5mm > by 20mm fuses). > > The above is based on my experience testing fuses for about 4 years, > during my tenure at UL. > > Regards, > > Peter L. Tarver, PE > ptar...@nortelnetworks.com > > -Original Message- > From: Jim Freeman > > In all of this discussion, no one has mentioned the possibility of > fire from blowing a PCB trace fuse. I know that there are flame > retardants in the PCB material that protect to a certain flashpoint > but to rely on that mechanism for fire prevention is a bit far > fetched. From my limite experience with fuses, there is generally a > large structure that is enclosed in sand to prevent a fire from > spreading. > > Jim Freeman > > Peter Tarver wrote: > > My experience with safety agencies is they do not want to rely on > traces opening to act as fuses and no standards have been developed, > that I am aware of, to address this issue. Fuses certification gets > involved in the metallic alloys used, to the fraction of a percent, > the conductor size, additional construction features, such as heat > sinking elements for time delay characteristics, tension loading for > fast action, blah, blah, blah. > > Most of these issues are far too difficult to control for pwb traces, > especially considering the etching processes don't lend themselves to > the level of control necessary to be a reliable fuse of specific > ratings. Additionally, the heat sinking from pwb layout of one > product to another or varying copper thicknesses in a product line, > adding or subtracting ground planes for emc, the variability of > soldering processes and location/thermal capacity of components on the > pwb make this seem far too cumbersome to want to work with. > > BTW, this is a very different world from "repeated twice, same result" > single-fault testing, where a pwb trace opens. > Regards, > Peter L. Tarver, PE > ptar...@nortelnetworks.com > > -Original Message- > From: Matsuda, Ken [mailto:matsu...@curtisinst.com] > Sent: Thursday, September 14, 2000 7:02 AM > To: emc-p...@ieee.org > Subject: PCB fuse trace > > I was wondering if anyone knew a standard for the US, Canada, and > Europe > that covers PCB board traces that can be used as fuses? > > > Thanks for the help, > Ken >
Re: PCB fuse trace
In all of this discussion, no one has mentioned the possibility of fire from blowing a PCB trace fuse. I know that there are flame retardants in the PCB material that protect to a certain flashpoint but to rely on that mechanism for fire prevention is a bit far fetched. From my limite experience with fuses, there is generally a large structure that is enclosed in sand to prevent a fire from spreading. Jim Freeman Peter Tarver wrote: > > > My experience with safety agencies is they do not want to rely on > traces opening to act as fuses and no standards have been developed, > that I am aware of, to address this issue. Fuses certification gets > involved in the metallic alloys used, to the fraction of a percent, > the conductor size, additional construction features, such as heat > sinking elements for time delay characteristics, tension loading for > fast action, blah, blah, blah. > > Most of these issues are far too difficult to control for pwb traces, > especially considering the etching processes don't lend themselves to > the level of control necessary to be a reliable fuse of specific > ratings. Additionally, the heat sinking from pwb layout of one > product to another or varying copper thicknesses in a product line, > adding or subtracting ground planes for emc, the variability of > soldering processes and location/thermal capacity of components on the > pwb make this seem far too cumbersome to want to work with. > > BTW, this is a very different world from "repeated twice, same result" > single-fault testing, where a pwb trace opens. > > Regards, > > Peter L. Tarver, PE > ptar...@nortelnetworks.com > > -Original Message- > From: Matsuda, Ken [mailto:matsu...@curtisinst.com] > Sent: Thursday, September 14, 2000 7:02 AM > To: emc-p...@ieee.org > Subject: PCB fuse trace > > > I was wondering if anyone knew a standard for the US, Canada, and > Europe > that covers PCB board traces that can be used as fuses? > > > > Thanks for the help, > > Ken > > --- > This message is from the IEEE EMC Society Product Safety > Technical Committee emc-pstc discussion list. > > To cancel your subscription, send mail to: > majord...@ieee.org > with the single line: > unsubscribe emc-pstc > > For help, send mail to the list administrators: > Jim Bacher: jim_bac...@mail.monarch.com > Michael Garretson:pstc_ad...@garretson.org > > For policy questions, send mail to: > Richard Nute: ri...@ieee.org >
Re: Chip noise halts Intel 820 motherboard
I was wondering why the Intel stock took a dive that more excessive than the market dive. The analysts probably recieved a heads up from some industry wag. Jim Freeman Paul J Smith wrote: > Barry, > > Thanks for the heads-up. Article was also published by AP in today's Boston > Globe. The following excerpt is from the site you noted > > Regards, Paul J. Smith > Teradyne, Boston > > Chip maker will replace motherboards using its 820 chip set due to noise > caused > by simultaneous switching of > signals. > > Intel Corp. has acknowledged another setback for PCs using its 820 chip set. > > The company announced Wednesday morning that it will replace motherboards > using > its 820 chip set that are exhibiting > symptoms of a problem with a related component -- called a memory translator > hub, or MTH -- with synchronous dynamic > RAM (SDRAM). > > While the hub is not part of the 820 itself, it is > required > on a motherboard that uses SDRAM. It > enables the chip set, which was designed to work with > Rambus dynamic RAM (RDRAM), to use > less expensive, more readily available SDRAM. > > "We have found that some systems ... may be sensitive to > system board noise," an Intel > spokesman said. > > Hangs and reboots > > The MTH problem, which manifests itself by system hangs > and > intermittent system reboots, is due > to noise caused by simultaneous switching of signals on > the > MTH buses, Intel officials said. > > Intel is working with PC and motherboard makers to notify > computer users of the problem and to > offer a replacement motherboard. Intel plans to replace all the 820 > motherboards with SDRAM support that it sold directly > to customers with an Intel 820 chip set motherboard with RDRAM memory. > > Computer users who believe they are affected should > contact their manufacturers, or they can > check Intel's Web site, where they can download the > MTH > ID Utility to test for the presence > of the hub. > > The MTH support site also includes additional > information on the problems. > > "We believe less than 1 million boards with the MTH have been shipped to > customers," an Intel spokesman said. However, > "since we have determined no root cause on this issue, we have decided to > offer > a replacement." > > Barry Ma on 05/10/2000 07:12:33 PM > > Please respond to Barry Ma > > To: EMC-PSTC > cc:(bcc: Paul J Smith/Bos/Teradyne) > Subject: Chip noise halts Intel 820 motherboard > > http://dailynews.yahoo.com/h/zd/2510/tc/chip_noise_halts_intel_820_production_1.html > > INTEL will replace motherboards using its 820 chip set due to noise caused by > simultaneous switching of signals. > > > Can anybody be more specific or just make a speculation by using EMC language? > > Another question is irrelevant to EMC. I am wondering why it took so long - > five > months from field failure report to recreating the problem inside INTEL? See > quotation below: > > First noted in November > "Intel began shipping the MTH last November. The problem was brought to light > by > an Intel customer who observed the problem Intel followed up on the report > and observed the problem in its own tests earlier this month." > > Barry Ma > b...@anritsu.com > > ___ > > Why pay when you don't have to? Get AltaVista Free Internet Access now! > http://jump.altavista.com/freeaccess4.go > > ___ > > --- > This message is from the IEEE EMC Society Product Safety > Technical Committee emc-pstc discussion list. > > To cancel your subscription, send mail to: > majord...@ieee.org > with the single line: > unsubscribe emc-pstc > > For help, send mail to the list administrators: > Jim Bacher: jim_bac...@mail.monarch.com > Michael Garretson:pstc_ad...@garretson.org > > For policy questions, send mail to: > Richard Nute: ri...@ieee.org > > --- > This message is from the IEEE EMC Society Product Safety > Technical Committee emc-pstc discussion list. > > To cancel your subscription, send mail to: > major
