In some manufacturing you cannot get through the security doors into the assembly area unless your boots and body strap pass the ESD test at the entry point.
David G3UNA > > From: "Mike Short" <[EMAIL PROTECTED]> > Date: 2006/12/20 Wed PM 12:24:56 GMT > To: <[email protected]> > Subject: RE: [Elecraft] ESD Risk vs Relative Humidity > > ESD damage does not always show up immediately. ESD can "stunt" the life of > components. > Instead of lasting 5 or 10 years, you may only get a few years out of them. > I have had a lot of training in the military on ESD, and they spend big > bucks on equipment > And training. The avionics building I worked in in Germany had ESD tile on > the floors, as well as grounded benches, mats > And straps, etc. > > Mike > AI4NS > > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Wyn Hughes > Sent: Tuesday, December 19, 2006 7:20 AM > To: Mike Harris; [email protected] > Subject: Re: [Elecraft] ESD Risk vs Relative Humidity > > Mike and Don, > > Thanks for your input. I suspect that ESD damage occurs more often than one > realises. Don's report confirms. I read reports that quite a few of the > NATO IC-781s went down in the last gulf conflict for no apparent reason, > other than microprocessor failure suspected due to the extreme low humidity. > I have experienced some strange and otherwise wholly inexplicable PC > failures due to early working without a wrist strap in the past. For safety > sake I will stick with the new mat amd its combined wrist strap. Then at > least I will eliminate one possibility from my shopping list of problem > causes. > > Best 73 > Wyn, VR2AX > > > > > ----- Original Message ----- > From: "Mike Harris" <[EMAIL PROTECTED]> > To: "Wyn Hughes" <[EMAIL PROTECTED]>; <[email protected]> > Sent: Tuesday, December 19, 2006 5:42 AM > Subject: Re: [Elecraft] ESD Risk vs Relative Humidity > > > > G'day, > > > > <snip> > > Today in Hong Kong we have relative humidity (RH) of 55% (temp a > > 'freezing' 16 C), compared to our norm of 90 - 100% RH and temp 30 C+ > > <snip> > > > > I assume the 16C was outside not inside. > > > > <snip > > These past two days my daughter and xyl have mentioned several 'static > > shocks' when they play with our cats, all 6 of them. > > > > I remember my school kid days of cats tail static generators, but there's > > a serious question behind this. Under what conditions of RH do most > > builders of Elecraft rigs operate? > > <snip> > > > > RH in the house is of the order 40-60% temp 20-22C most of the time. No > > cats, no ESD countermeasures besides touching an earthed object before > > picking up sensitive devices. Not killed one yet. > > > > Regards, > > > > Mike VP8NO > > > > > > _______________________________________________ > Elecraft mailing list > Post to: [email protected] > You must be a subscriber to post to the list. > Subscriber Info (Addr. Change, sub, unsub etc.): > http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/subscribers.htm > Elecraft web page: http://www.elecraft.com > > _______________________________________________ > Elecraft mailing list > Post to: [email protected] > You must be a subscriber to post to the list. > Subscriber Info (Addr. Change, sub, unsub etc.): > http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/subscribers.htm > Elecraft web page: http://www.elecraft.com > ----------------------------------------- Email sent from www.ntlworld.com Virus-checked using McAfee(R) Software Visit www.ntlworld.com/security for more information _______________________________________________ Elecraft mailing list Post to: [email protected] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
