Sequential circuits samplers

!! wow different versions of 3379's!

My 2002 looks like a rev C. (is that right?) 

there are 7x 3379/8609's and 1x 3379/8540 (!)

I'm thinking these might be akin to Lot numbers for production runs when these chips were manufatcured.

I have yet to open the 2000 to see. The 2000 has an 877 expansion board in it - is this suitable to facilitate the separate-outs?

Also has anyone had an issue where what seems to be a ground-loop hum that comes out all static'y and like digital noise? If I can post a wav somewhere like soundcloud I'll try to post a link so you all may listen after the weekend.


mixedmeteor


--- In prophet2000@yahoogroups.com, "dd_62622" <dd_626@...> wrote:
>
> the plot thickens .
> 
> just opened a keyboard version prophet 2000 (sampling keyboard;)
> 
> and to my surpise there was a mix of cem 3379 /8540     and 3379 /8542 installed.
> 
> I don't see any info on the net about the added nrs. on the cem 3379 chips.
> 
> I swapped the chips from the 2002 boards today and both units worked fine  .
> 
> cheers,
> David
> 
> 
> --- In prophet2000@yahoogroups.com, "dd_62622" <dd_626@> wrote:
> >
> > Hallo,
> > 
> > I wonder if anybody is aware that there are two versions of cem chips that could be inside your p2000 ?
> > 
> > I have found out before and encountered the differcene again.
> > 
> > I have 1 p2002 rev A voiceboard with cem 3379 /8708
> > 
> > and another p2002 rev B voiceboard with cem 3379 /6833    
> > 
> > I wonder if these chips are interchangeable ?
> > any comment appriciated.
> > 
> > kind regards,
> > David
> >
>