home *** CD-ROM | disk | FTP | other *** search
- Path: sparky!uunet!wupost!zaphod.mps.ohio-state.edu!news.acns.nwu.edu!nucsrl!ddsw1!serveme!n5ial!jim
- From: jim@n5ial.chi.il.us (Jim Graham)
- Newsgroups: comp.dcom.modems
- Subject: 16550AFN replacement for soldered-in 8250.
- Distribution: world
- Message-ID: <716263250snx@n5ial.chi.il.us>
- References: <1992Sep08.231048.3194@gremlin.muug.mb.ca>
- Date: Sat, 12 Sep 92 02:00:50 GMT
- Organization: Me? Organized? Hah! :-)
- Lines: 51
-
- In article <1992Sep08.231048.3194@gremlin.muug.mb.ca>
- charles@gremlin.muug.mb.ca writes:
-
- > nelson@crynwr.com (Russell Nelson) writes:
- >> My serial port board has one socket, and one soldered-in 8250. I
- >> didn't want to use the socket, because that means buying the line
- >> drivers and external DB-25.
-
- > For which after doing the below, probably ended up costing you more!
- > Those little cables can be picked up for a buck, and the drivers are what?
- > 89 cents each?
-
- I agree with you on this part --- except for the price of the drivers...
- I've seen them for about half of what you quote. :-) either way,
- they're dirt cheap. we agree on this, no question.
-
- > Get one of those de-soldering irons from Radio Shack with the bulb.
- > (No, I'm not talking about a seperate iron and bulb, RS makes an iron
- > with the bulb mounted on a steel tube that gets hot, melts the solder and
- > is sucked into the tube).
-
- here's where I disagree. I'm basing this statement on the last version
- of the rack shack desoldering iron I saw, which was many many years ago,
- so it may well be incorrect today, however.... last time I checked,
- this was something like a 40 watt iron --- not too safe for use on a
- board with lots of semiconductors.
-
- my suggestion would, therefore, be more along the lines of getting a
- nice grounded, 25 watt soldering iron, and either a de-soldering bulb
- or the neat little de-soldering strip from rack shack. the idea being
- both to reduce the heat seen by other chips on the board (that might
- be close enough to the old 8250 to be damaged by a large iron) and
- also to help reduce the potential for damage to static charges.
-
- the best solution, of course, is just to buy the line drivers (I
- recently bought a complete set for less than a dollar) and use the
- empty socket.
-
- ok, now that I just got off of an almost hour-long phone call, what
- the heck was I talking about? oh well, I think I was almost done
- anyways..... if I missed something, feel free to kick my in the
- head to remind me. :-)
- --jim
-
- --
- #include <std_disclaimer.h>
- ------------------------------------------------------------------------------
- INTERNET: jim@n5ial.chi.il.us | grahj@gagme.chi.il.us | j.graham@ieee.org
- ICBM: 41.70N 87.63W UUCP: gagme!n5ial!jim@clout.chi.il.us
- AMATEUR RADIO: n5ial@n9hsi (Chicago.IL.US.Earth) 73 DE N5IAL (/9)
- ------------------------------------------------------------------------------
-