[sdiy] Oberheim OB-Xa internal ribbon cables

[Eric Frampton]

It’s actually the ribbon that connects the mainboard with the voice boards, not the front panel. You can hold down a chord, wiggle the ribbon, and the pitches change drastically. 

I know it’s a 26-conductor cable, but as far as spacing wire gauge and the type of press-on connector it uses to connect to the voice boards and all, I don’t know exactly what I’m looking for.

e

> On Nov 9, 2017, at 1:40 AM, Roman <modular at go2.pl> wrote:
> 
> That's regular ribbon cable with 0.1'' pitch, I think it's 36-wires, easy to get in any electronic store as "flat ribbon cable". I guess that's the one connecting panel board with mainboard?
> It's hard to believe the cable is broken in the middle, unless there are some clearly visible marks of abuse. I's expect them to break at the connectors first. Have you checked continuity with multimeter?
> All panel pots are working as expected?
> 
> Roman
> 
> Dnia 8 listopada 2017 19:03 Eric Frampton <eric at ericframpton.com <mailto:eric at ericframpton.com>> napisał(a):
> 
> Hey folks -
> 
> I’m working on a buddy’s OB-Xa, and the ribbon cable between the motherboard and the voice trays is failing (when you move the cable keeping the ends intact, the pitch of various oscillators fluctuates significantly). I need to order a new one, but I’ve never had to spec ribbon cables before so I don’t know what to look/ask for. Help?
> 
> thanks,
> Eric
> 
> 
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