This PPG has a strange history. It's recent description led you to believe that this unit has always had mismatched voice cards and PROZ board... someone's botched attempt at mixing parts from a Wave 2.2 and 2.3.
However, I found the original (or as old as I could find) listing on the
Spheremusic VEMIA site. When it was sold at that time all the parts were matching according to the photos. Whether purposeful or accidental, the PROZ board got swapped sometime between VEMIA and the owner I purchased it from.
It is very easy to identify PROZ card versions, even from the back. Here is a photo of the rack PPG from the VEMIA page in 2011:
 |
| VEMIA Photo from 2011 showing matching boards |
|
The sections I circled clearly show this is a V2.3 PROZ board. The white square is two chips that are a noticeable difference at the top of the board. The magenta square is the PPG-BUS connector for the ribbon cable and is probably the most obvious difference. Here is a photo from
PPG Synth Net showing three versions of the 2.3 board:
 |
| Three versions of the Wave 2.3 PROZ board |
There are other obvious identifying parts as well, like the yellow capacitor on the far top corner.
On V2.2 PROZ boards the bus connector is in the top middle of the board as you'll see in following photo. This one is taken from
MatrixSynth,
Reverb, and the Ebay auction where I purchased the unit. Perhaps unrelated, but the user unregistered his account shortly after selling it to me.
 |
| Recent photo of the 2.2 PROZ board now living in the rack |
Notice the very different layout.
In the next post I'll talk about certain missing components and getting the 8-bit 2.2 PROZ talking to the 12-bit 2.3 voice cards.
