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- Path: cncmac.supra.com!user
- From: clay@supra.com (Clay Cowgill)
- Newsgroups: comp.dcom.modems,comp.sys.mac.hardware.misc,comp.sys.mac.comm
- Subject: Re: mac modems with no wall adaptor needed
- Date: Mon, 26 Feb 1996 09:33:58 -0800
- Organization: Diamond Multimedia, Supra Communications Div.
- Message-ID: <clay-2602960933580001@cncmac.supra.com>
- References: <4g19ml$ke0@tuba.cit.cornell.edu> <1996Feb16.212654.11050@dsi.bc.ca> <4gaetf$ci8@dartvax.dartmouth.edu>
- NNTP-Posting-Host: cncmac.supra.com
-
- In article <4gaetf$ci8@dartvax.dartmouth.edu>,
- Steven.D.Ligett@dartmouth.edu (Steven D. Ligett) wrote:
-
- > With OLD Macs (SEs and Mac IIs come to mind), you could blow the ADB power
- > fuse, for which the ordinary Apple Dealer fix would be a motherboard
- swap. New
- > Macs use a PTC "fuse" - a thermal self-resetting gadget. I know someone who
- > was going to put four such ADB powered modems on a Mac; I recommended against
- > it. :-)
-
- We've had people call with as many as *SEVEN* hanging off one ADB port.
- Not a particularly good idea, but on the other hand it *was* working fine
- until we told them not to do that anymore. We've intentionally tried to
- blow up ADB ports here with a selection of the most power-hungry ADB
- devices we could find-- you'd have to go far beyound the ADB maximum
- device numbers to put your machine at much risk.
-
- (And as Steven mentions all the newer machines use a Polyswitch that
- "opens" the circuit when it gets too hot (from too much current draw) and
- then "resets" when things have cooled down...)
-
- -Clay
-