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- Path: news-2.ccinet.ab.ca!usenet
- From: tmeikle@ccinet.ab.ca (Trevor Meikle)
- Newsgroups: comp.sys.amiga.hardware
- Subject: Re: Battery Acid Timebomb
- Date: 2 Feb 1996 10:09:08 GMT
- Organization: CCI Networks, a division of Corporate Computers Inc.
- Message-ID: <1871.6606T165T2295@ccinet.ab.ca>
- References: <4efa0d$apr@vixen.cso.uiuc.edu> <4eitib$1oa8@news.doit.wisc.edu> <2397.6603T1236T2627@galstar.com>
- NNTP-Posting-Host: gcr2.ccinet.ab.ca
- X-Newsreader: THOR 2.22 (Amiga;TCP/IP) *UNREGISTERED*
-
-
- On 31-Jan-96 14:11:19, David Templeton said somthing about Re: Battery Acid Timebomb:
- >>In article <4efa0d$apr@vixen.cso.uiuc.edu> claevius@prairienet.org
- >>(Brent Busby) writes:
- >>>
- >>leave the tip in contact with the traces for a long time to get the
- >>solder to melt properly for a good connection, or risk a cold joint.
- >>That'll heat up the components. Using a high watt iron, you can get
- >>the solder to melt almost immediately, get a good joint, and not heat
- >>up the surrounding components.
- >> At least, that's what I've been told, and that's my experience.
-
- > You use a low wattage iron on microelectronics for Gods sake! You
- >need to go take a class in soldering. Liquid flux is used to ensure
- >the solder heats and flows evenly. There is no substitute for proper
- >equipment and materials. If you don't have them or can't get access
- >to them take it to a shop and have it done right.
-
- Depends on your definition of low wattage irons. Low watt usually
- means 10-15 watts, which is generally too low to use on PC boards. 25-25
- watts is usually the best, if you can't get a temp controlled iron. For
- temp controlled irons, the stting I use is at 650 to 675 degrees farenheit.
-
- > Besides the A4000 has a multilayer board and you need flux to
- >ensure the solder flows evenly to the contacts on both sides of the
- >PCB. A high wattage iron will burn the PCB, cause the runs/tabs to
- >lift and FRY sensitive semiconductor devices.
-
- You have more of a chance of lifting pads and runs with a lower
- wattage iron. Reson is that you generally have to hold the iron on the
- component longer for the proper amount of heat transfer. Ive got a 15 watt
- pencil iron, and the only thing I use that for is flat packs and SMT work.
- Otherwise I use a 30 watt iron.
-
-
-
- --
- Trevor Meikle Email: tmeikle@ccinet.ab.ca
- Power to the AMIGA From Medley, Alberta, Canada, Eh?
-
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