philpem, 1 month ago

@lethalbit Interesting - I thought the IDC connector topped out at 50 pins (they're a pain to remove too) and the internal 68 was a high-density D-sub. The external 68 is the same connector but tougher - I've plugged external HD68 cables into internal drives for testing.
Where did the IDC68 turn up?

lethalbit, 1 month ago

@philpem I mean it is /kinda/ dsub, but it's still an IDC connector, just with a fine pitch,

Personally i've not seen any such devices but /supposedly/ they showed up on internal CD-ROM and HDD drives.

So maybe it's the same mating connector style but just crimped onto a ribbon cable :v

philpem, 1 month ago

@lethalbit ohhh! yeah, that's the HD68 and they do have an IDC variant. I thought you meant the big 0.1 pitch 2-row things.
They are indeed the same as the external plugs but crimp-on for convenience/mass-manufacture.
They might have turned up on CD drives but I've mostly seen them on later DDS tape drives and hard drives.

I have an Amphenol HD68 internal SCSI cable around here somewhere which is twisted-pair. The cables crimp onto an untwisted section that happens every few inches.