WTD: EMS VCS3 Board 'A' Schems

[JDMcEachin]

At 08:22 AM 12/21/96 -0800, A.S.P. wrote:
>
>I think I have a chance at getting a broken VCS3.  Problem is that board
>'A' is thoroughly hosed.  My intention is to scan in the board's PCB
>traces and print out a new board with that Press and Peel stuff.  If
>anyone has schematics for this section, pcb layout - even a functional
>blockdiagram that shows me exactly what part of the synth is on this
>board, I'd be extremely grateful.

That sounds like a really bad idea.  If there's one place you can really
improve the VCS3's sound without changing its character, it's on that board.
The design is an abortion (non-symmetrical power supplies suck).  Besides, I
think that the stuff Dave fried may be hard or impossible to get.  You'd be
better off replacing the board functionally with circuits that are better
designed.  Actually, I think that's what Graham is doing.  I'd better check...

Graham's webpage (http://www.hinton.demon.co.uk/ems/emsmods.html) says:

>The ICs used for the internal squeakers and reverb drive are no longer 
>obtainable. If they go, it's time to completely replace Board A. Rebuild the 
>equivalent circuitry on an extended (220mm) Single Eurocard. 

Well, there you have it.

JDM

PS Graham's EMS page is WAY cool!