[sdiy] Arp / Oberhein keyboard mystery

[Dave Manley]

I'm guessing 1604-P is a typo for 3604-P, if not then yes, pics please.  I
have an early 2600 service manual (not the common 2600-2606 version) and it
only shows an opamp module as DaveB mentions on the 3604-P pcb.

The ARP 16xx series were sequencers (1601, 03, 04, 21, 23 are ones I've seen).

No idea about the Oberheim 1036-A.

On 5/31/2011 1:25 PM, Dave Brown wrote:
> I have no idea what a 1604 keyboard is.  I've never seen one. Is it like a
> CV keyboard or a self-contained synth?
>
> In my 3604P serial 1620 keyboard they had a Dynamic Measurements Corporation
> 148-130 potted module.  It basically was a sample and hold module made from
> a high input impedance discrete op amp.  If the 1604 is earlier, they may
> have bought some type of S&H from someone else.  Just a wild guess.
>
> Tell me more about a 1604.  Any photos?
>
> Dave
>
> -----Original Message-----
> From: synth-diy-bounces at dropmix.xs4all.nl
> [mailto:synth-diy-bounces at dropmix.xs4all.nl] On Behalf Of Grant Richter
> Sent: Tuesday, May 31, 2011 12:21 PM
> To: Synth DIY
> Subject: [sdiy] Arp / Oberhein keyboard mystery
>
> I was asked to repair an ARP 1604-P keyboard (not functioning).
>
> When I opened it up, I discovered a piggy back board PCB on the Arp PCB.
>
> The piggy back board is labeled "Oberheim Electronics 1036-A"
>
> Anybody got a clue what this might be?
>
> Thank you for any help.