On Aug 29, 10:19am, Max wrote: > Subject: Re: Need EMC Help With Video Card >
> I still have the problem when I remove all of the cables from the system, > including the printer cable, etc. The emissions are coming out of the > holes in the PC cabinet and this is a very good PC and is well sealed. The > largest emissions seem to be coming from the fan vent holes. > > [email protected] >-- End of excerpt from Max Max, We have had problems with fans and fan vent holes very often. All the rules about hole sizes and emissions don't apply when the body of the fan is mounted right up against them and the fan itself is "hot" with RF. We have had to keep the power wiring to the fan held flat against the chassis and then put ferrites on it to choke off any pickup from emissions inside the box. Once we had to put ferrites on the fan leads from a Pentium cooling fan. It seemed to pick RF up capacitively right off the case of the Pentium it was cooling and then the leads radiated thruout the case. Good luck! -- Mike Donnelly [email protected] WD7M Standard disclaimer: These are my own words, not the Company's.
