Re: db-19 cables from older Mac 400K 3.5" drives

[dalloff@freenet.columbus.oh.us (Dave Althoff)]

David Empson (dempson@actrix.gen.nz) wrote:
: stephen e buggie <buggie@argo.unm.edu> wrote:

: >       I once did pin-out measurements on this short db-19 cable and
: > found them to be the same as with Apple II db-19 cables.
: >
: >       I've connected this short Mac db-19 cable to Apple Disk II drives.
: > About half the time, the drive works perfectly.  Yet, with half the short
: > cables, the drive does not work well.

: It is possible that not all cables are identical.  They may have
: eliminated unused wires in some cables.  The Apple 3.5 Drive on an Apple
: II uses more signals than the 400K/800K/Apple 3.5 on a Mac.

: However if they just work unreliably (as opposed to either perfectly or
: not at all), this isn't likely to be the problem.

: > My _hunch_ is that possibly the male pins on the db-19 plug may be
: > slightly thin, and some do not make good contact with the walls of the
: > female db-19 socket.

: That sounds a little dubious, but not beyond the bounds of possibility.
: It could be a noise/shielding problem.

Good point...Steve, this is a long shot...but have you tried leaving the
magnet in place?  It's there for a reason, you know...of course, I've
never known the presence or absence of the magnet to make any difference...

--Dave Althoff, ][.
-- 
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