[sdiy] PPG EVU info?

[thx1138]

On 6/20/09 8:38 AM, "Magnus Danielson" <magnus at rubidium.dyndns.org> wrote:

> Paul Maddox wrote:
>> Mark,
>> 
>>   :-)
>> The EVU is basically a wave 2.3, whilst the difference in number is
>> small, the insides are VERY different.
>> The 2.3 is 12 bit, 8 part multi-timbral and the PROZ board is very
>> different to the 2.2, which is 8 bit and mono-timbral (ok, bi
>> trimbral, but....).
>> 
>> check here for more detail ;-
>> http://www.ppg.synth.net/wave23/
>> 
>> I have *SOME* schematics for the 2.3, but not all, specifically *NOT*
>> the proz board, more detail of the proz board can be had here -
>> http://www.ppg.synth.net/faq/proz_fault.shtml
>> 
>> If you want more, mail me off list.
> Maybe my PROZ board schematic would be of assistance? Either of us could
> bring it online...
> 
> Cheers,
> Magnus
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Hello Magnus,

Whilst I was engineering products at PPG in Hamburg, we made corrections to
the Proz PCB to eliminate the Mods and Jumpers.

The Proz board may look different in the EVU but it was the same.

When I built the EVU, it needed a good deal of corrective updates to be
reliable. We did not build many EVU, as orders for PPG 2.3 kept us busy as
well as 2.2 to 2.3 updated.

The PRK was basically just a prototype until I got it all working with
wolfgang.

Documentation was developed by Wolfgang Dueren's guys and me. No real
schematics or revision control existed as far as I could tell from working
at PPG Hamburg.

Still we managed to muddle quite a bit of production together with a basic
re-org while I directed engineering and production.

Still it is a shame that PPG went bankrupt as it was a good synth just not
cost effective against the Japanese synth prices from Yamaha, Roland, Korg
etc.

Regards,

Terry