> Carrie: > I have always known to be 100 mills min off the board for 1 Watt or greater component. The greater the wattage the more heat they produce. Unless there is a short and a little fellow burns out and takes part of the board with it. > Ramon > > -----Original Message----- > From: Roger Stoops [SMTP:[log in to unmask]] > Sent: Thursday, March 11, 2004 10:00 AM > To: [log in to unmask] > Subject: Re: [TN] Can't remember a darned thing! > > Actually, I believe the issue would be the operating temp of the component itself in relation to the temperature at which the board material begins to degrade or become damaged. My memory tells me that if the operating temp at the surface of a resistor exceeded 70deg C or so, we would stand the little fella off the board a minimum of 1.5mm. Then again, my memory may be just as bad (or good) as yours... > > I also checked the CM-770 doc, but didn't find anything after a cursory exam. > > > Roger M. Stoops, CID+ > Trimble Navigation Ltd., Dayton, OH, USA > Ph: +01 937.245.5288 > Fax: +01 937.233.7511 > > > -----Original Message----- > From: TechNet [mailto:[log in to unmask]]On Behalf Of Morse, Carrie > Sent: Thursday, March 11, 2004 9:33 AM > To: [log in to unmask] > Subject: Re: [TN] Can't remember a darned thing! > > > Phil, > Real funny! > > Are you implying that YOU can't remember either, or that there is none? > If there is none, was there ever one? I thought it was in IPC-A-610B. > Or maybe it was a military application from my old Raytheon days. I was > young then and probably would have remembered! > > -----Original Message----- > From: Phil Nutting [mailto:[log in to unmask]] > Sent: Thursday, March 11, 2004 9:30 AM > To: TechNet E-Mail Forum.; Morse, Carrie > Subject: RE: [TN] Can't remember a darned thing! > > Ooh, good question. There is a standard for this... cool! > > -----Original Message----- > From: TechNet [mailto:[log in to unmask]]On Behalf Of Morse, Carrie > Sent: Thursday, March 11, 2004 9:27 AM > To: [log in to unmask] > Subject: [TN] Can't remember a darned thing! > > > Since, for some reason, I can't remember a darned thing lately, I was > wondering if someone could tell me WHERE within all of our IPC specs I > can find where it specifies at what wattage we need to start raising > resistors off the board (ex: 1W, 1.5W?) > > Thanks, > Carrie > > --------------------------------------------------- > Technet Mail List provided as a service by IPC using LISTSERV 1.8e To > unsubscribe, send a message to [log in to unmask] with following text in > the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or > (re-start) delivery of Technet send e-mail to [log in to unmask]: SET > Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the > posts: send e-mail to [log in to unmask]: SET Technet Digest Search the > archives of previous posts at: http://listserv.ipc.org/archives Please > visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for > additional information, or contact Keach Sasamori at [log in to unmask] or > 847-509-9700 ext.5315 > ----------------------------------------------------- > > --------------------------------------------------- > Technet Mail List provided as a service by IPC using LISTSERV 1.8e > To unsubscribe, send a message to [log in to unmask] with following text in > the BODY (NOT the subject field): SIGNOFF Technet > To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) > To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest > Search the archives of previous posts at: http://listserv.ipc.org/archives > Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 > -----------------------------------------------------> > > --------------------------------------------------- > Technet Mail List provided as a service by IPC using LISTSERV 1.8e > To unsubscribe, send a message to [log in to unmask] with following text in > the BODY (NOT the subject field): SIGNOFF Technet > To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) > To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest > Search the archives of previous posts at: http://listserv.ipc.org/archives > Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 > ----------------------------------------------------- --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 1.8e To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 -----------------------------------------------------