Brian Instruments BRIKON model 723 floppy drive tester/analyzer

Hello Joe, Thanks for your offer to copy the manual. That would be so helpful! I'm located in Calgary, Alberta, Canada, near the beautiful Rocky Mountains. In the interests of trying to help you with your analog cable problem, I'll try to describe what my unit has... Two ribbon cables come out the back of my unit: - A "normal" IBM-PC 34 pin ribbon cable with two connectors on the end (one that mates with the connector found on most 3.5 inch drives and one that mates with the PC-board-edge connector found on older 5.25 inch drives). - A wider 50 pin ribbon that mates with a PC-board-edge connector. I don't know what kind of drive this cable is for! There are also two male receptacles on the back near the center of the unit. - A 20-pin (2 X 10) connector that looks like it will mate with my old Apple II 5.25 inch floppy drives. I have not been brave enough to try it yet! - A 40-pin (2 x 20) connector of the same style as the above 20-pin connector (just longer :-) Inside the unit these two connectors are mounted on a small PC board, which then has a jumper to one of the unit's two plug-in "cards". This small PC board is fed an unregulated voltage, and has a linear regulator (+12 volt if I remember right) mounted on it. Aside from some capacitors, there's not much more on this board. The board looks more like an adaptor than anything else. Could it be you're missing this little adaptor board? If so, I can reverse engineer it for you. It wouldn't be the first time I've created a schematic from a populated PC board! Somewhere around here I have an Apple service manual that gives the pin-outs for the 20-pin floppy drive connector, though I would expect you should be able to find that on the web pretty easily these days. But if you need it, I'll dig it up. Finally, there's the leads to supply power to the drives under test: - one lead ends with a connector appropriate for 5.25 inch drives, and came mated with a short adaptor to fit 3.5 inch drives - the second lead ends with a strange 6 pin (2 rows of 3) connector that probably fits what ever monster the above 50 pin ribbon cable was intended to mate with :-) Please let me know if I can help. My email address (replace the Z with "@" and the X with "."): kennjZtelusplanetXnet (yeah, I already get enough spam!). Take care, Kenn