Re: Ground potential differences

2002-10-12 Thread John Woodgate
I read in !emc-pstc that Bailey, Jeff wrote (in ) about 'Ground potential differences' on Fri, 11 Oct 2002: > I am interested >to know what the actual magnitude of ground differences may be from one end >of a plant to another as well as where the numbers come from. It depends on what sort of

Re: Ethernet Radiated Emissions

2002-10-12 Thread John Woodgate
I read in !emc-pstc that neve...@attbi.com wrote (in <20021011040337.NIT V4193.rwcrmhc51.attbi.com@rwcrwbc69>) about 'Ethernet Radiated Emissions' on Fri, 11 Oct 2002: >Second, I recommend refraining from sarcastic comments >in this forum, since that doesn't seem it was about >naivety. No sar

RE: Filtered D-Types.

2002-10-12 Thread Chris Maxwell
Filtered D-subs can be purchased from Conec, Spectrum Control and Amphenol (maybe not any more). A rubber insert with filter caps can be purchased from Metatech. Chris Maxwell | Design Engineer - Optical Division email chris.maxw...@nettest.com | dir +1 315 266 5128 | fax +1 315 797 8024 NetTe

RE: David Sproul...UL creepage limits ;~)

2002-10-12 Thread Scott Lacey
I thought that I might weigh in on this one: As someone mentioned previously, the big hazard involved in jump starting an automobile is the risk of a spark igniting hydrogen gas vapors from the battery. This causes the battery to explode, which sends dilute sulfuric acid and pieces of the ba

Filtered D-Types.

2002-10-12 Thread David Sproul
Hello Group, does anyone knee where I can get either filtered D-type connectors or filter cards that be inserted inside the shell to filter the signals? I was at a seminar where these were shown being used in a Japanese video, (with English voice over) and I was asked if I could source them. Can

RE: Creepage

2002-10-12 Thread David Sproul
Peter Tarver and all, Yes I know that these aren't harmonised standards. My original query I guess was why independent bodies should decide upon such varying creepage distance requirements. I had naively thought that these distances would have been determined by some universally recognised formu

Re: Ferrites for GND

2002-10-12 Thread Wan Juang Foo
Dan, It is a lossy material and most commercially available ferrite beads are 'tuned' to peak around the 100 MHz (VHF band II ?). I suppose there must be lots of exception but I have not use any outside this region. Most of them have different Q to describe their individual characteristics. Ob