> From: Mike Evans <[EMAIL PROTECTED]>
> Date: Mon, 23 Jul 2001 14:37:49 +0100
>
> It's Antiques Roadshow again... I inherited this late 80s
> vintage external
> hard drive (40MB, SCSI) , it came with a Mac Plus.
[snip]
> The weird thing is, there is no socket for power at the back.
> At the back of
> it, apart from the normal two SCSI ports (Centronics-50),
> there are just two
> mini-DIN 8 type sockets (similar -looking to the Mac's modem/printer
> sockets.. perhaps a bit bigger), but with holes for only
> three pins, not
> 8...
[snip]
> Anyone know how I can power this thing up? The Plus and the
> drive also came
> with a loose cable, that will fit in the back of the Plus, in
> the large
> socket next to the SCSI dB-25, which I understand is normally for an
> external floppy drive. The other end of this cable has a
> mini-DIN 3 plug,
> that fits perfectly in one of the two such sockets at the
> back of the hard
> drive... I guess this cable is related to the drive?? (The
> package did not
> include an external floppy drive.) Any ideas, before I ruin it with my
> ignorant experiments with cables?
I would bet you can use this cable to power the drive.
I have used the DB-19 port (normally for external floppy drives and early HD's) to
power an external ZIP-drive on my Classic, and it works.
Check <http://developer.apple.com/technotes/hw/hw_19.html> for the pinouts of the
DB-19 (found the URL in p.'s faq). Pins 1-4 are GND, 5 is -12V, 6 is +5V and 7 & 8 are
+12 V.
Is the disk inside the case a normal SCSI-disk (with the normal internal connectors) ?
If so, you could take it out, use the cable to connect the case to the mac, and
measure the current of the internal power connector.
HTH
Luc
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