OB-8 calibration error

Magnus Danielson cfmd at swipnet.se
Mon Nov 20 01:27:55 CET 2000


Hi!

I've looked at Juergen Haible's comments regarding an error in the
OB-8 service manual regarding calibration of envelope offsets.

Juergen's comments is to be found at Hyperreal at:
http://machines.hyperreal.org/manufacturers/Oberheim/OB-8/mods/oberheim.OB-8.snappy.envelopes

Now, as I turn to my OB-8 service manual page 6 it will have a
handwritten reference to ECO 427. Now, since I am furtunate enougth to
have that I looked it up. Now, this ECO 427 specifies the update of
the EPROMs (to rev A7) as well as modified calibration routines.

According to these modified calibration routines shall the maximum
value be calibrated to -256.0 mV (JH specifies -250 mV which is
close).

Maybe it is time to bring this ECO onto the wounderfull world of the
web?

Cheers,
Magnus






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