OBERHEIM SYNTH

Sounds like you are on the right track.

Just starting backwards. You can get the jumper from radio shack .....but you can use regular wire. Just bend the wire around the leg (without touching the adjacent leg) of the ic and touch the resistor leg. No biggie.

The stereo panning indeed throw you for a loop with the individual volume levels through a stereo Mixer or PA. Just use headphones and have at it!

Check out my OBxa site with tuning and restoration. More as an online notebook for myself but there might be some additional information (IC #64 mystery etc)

James



________________________________
 From: "jbrey21@... [oberheim]" <oberheim@yahoogroups.com>
To: oberheim@yahoogroups.com 
Sent: Thursday, July 24, 2014 5:22 PM
Subject: [oberheim] OB-Xa Calibration!
 


  
Dear Group,




I just did a full calibration on my OB-Xa yesterday and ran into a couple of things I would like feedback on.

The biggest issue is that the individual voice cards (I have 8 in mine) - all put out similar but different volume levels.     It seems for instance that the bottom tray is a bit weaker on the output than the upper tray.     

I use the synth in MONO much of the time via the MONO output and wonder if there is any way to equalize the volume settings via the individual voice cards.     One thing I did not address in the tune-up was the VCA offset pot because I don't have a small jumper cable with tiny alligator clips on it to do the tweak at the moment.

Any info would be helpful - thanks!



jbrey21@...