All the voice boards are the same.
The general number convention is voice 1-4 are on the bottom, voices
5-8 are on top.
Running as a 7 voice is no problem, but you will only get 3 voices
rather than four when you split the board (the other end of the split
will have 4 voices) , but when you double, some strange things might
happen - I have never tried it.

--- In oberheim@yahoogroups.com , "L8RDOOD" <nansbears@...> wrote:
>
> I'm somewhat of a novice so forgive me if my questions
seem "ignorant".
> I bought off Ebay quite awhile ago an Oberheim OBX-a. I got it
cheap
> because the seller said it was "dropping a sound". Not knowing any
> difference at the time, I thought it would be cool to have a
vintage
> synth to "restore" as a project. Well, due to several unforseen
> situations, I wasn't able to get on the project so I put it off for
a
> year. As I researched, I found the contacts needed to be cleaned &
the
> keys leveled, among other things. Since my time for this was not
going
> to be like I thought, I decided to take it in to a repair shop in
L.A..
> It took quite a while but the repairman said it was missing a
voice
> board. To get all the work done, he wanted nearly double what I
even
> paid for it so I decided to pass on getting the board for now. So
now
> it's a 7 voice synth. I had the contacts cleaned anyways and I will
be
> picking it up this week(minus the missing board).
> Here goes the questions: Are all the voices the same If not,
are
> they numbered or named so I know what to get Does anyone on this
list
> have any boards available to sell Is this even worth my time to do
> this If anyone has done this in the past, please help if you can &
> thanks for all your help in advance!
>