...
There are some slightly different HAA15-0.8-A Power supply out there. Mine is different from this: http://www.cs80.com/crowbx/psmod.html
Mine has a slightly different layout. I used two 2k2 Ohm resistors. parallel to R52 and R79.
The Voltage is now adjustable between 8- and 20Volts.
So no Problem to justify for 19Volts.
- Voice Card BOM Typo:
correct: Optional: for compliance with Oberheim ECO for PW trimming on VCOs, change R73/R74 to 46.4K 1% and R15/R16 to 34.8K 1%
- IC3 (CD4011) is lacking in the BOM
You have to solder a diode at the output of the 15V regulators
Documents:
Crowbx_mount_calibration_carrier_rev1.pdf
Power issues:
the Linear PSU´s have on startup some issues to bring both voltages (-15/+15V) at the same time, in result the voltage regulators blows on obx.
in my modular system i have on high load similar issue with this rootcause..
(picture from http://www.modularsynthesis.com/modules/DJB-power/djbpower.htm )
Calibration Issues:
Hint for calibrate the Voicecards:
The IC1 and IC4 must not be inserted while doing the calibration, because the DMM- OHMs measurement injects to much voltage which falsify the measure.
Hopefully the Green Lines shows where the Testpoints are 
The both multiturn pots must be adjusted to 61K.
| Gallery | ||
|---|---|---|
|