[sdiy] OB-8 Battery Replacement/OB-8 ECOs Online?

[Magnus Danielson]

From: Doug Terrebonne <dougt55 at yahoo.com>
Subject: Re: [sdiy] OB-8 Battery Replacement/OB-8 ECOs Online?
Date: Sat, 29 Jan 2005 00:28:52 -0800 (PST)
Message-ID: <20050129082852.37888.qmail at web81208.mail.yahoo.com>

Doug,

> If you have ROM version A6 or later I *think* the envelope cals are stored to
> tape when you do a backup... Does any one have the OB-8 ECO docs online? The
> links on Magnus' site are all dead... 

I've been out of disc so I didn't bring them on my server. If you try now (make
sure to reload the page, the links have changed) you will find all the ECOs
that I've got online!

I'm getting out of town over the weekend, so I will probably not be able to
answer any emails again until tomorrow evening (late CET). Enjoy the ECOs.

If you got any EPROM version other that A8 and B5, please let me know. I would
become happy to have an image of them, so I can put it on the server.

As for the issue of changing battery. You do want to read the service manual
http://rubidium.dyndns.org/~magnus/synths/companies/oberheim/
and there you have all the necessary details on how to *create* the data.
You can do tape backup, but every once in a while you may want to tune it up
from bottom anyway, and it doesn't take that much time. Beware that the filter
tuning should be done in the upper end of the keyboard rather than the lower.
The highest note should be played for offset and an octave down for the scale.
I don't think there is anything in the manuals about this. Maybe Tony and
Jürgen have any more info to share on this?

PS. I had this optical distorsion on my labbench yesterday:
http://rubidium.dyndns.org/~magnus/synths/temp/whatda.jpg

Cheers,
Magnus

> Doug
> 
> --- doof <doof at cox.net> wrote:
> 
> > Greetings all,
> > 
> > I need to replace an aging battery in my OB-8, has anyone carried out this
> > procedure before?  I assumed it would be an easy swap until I read somewhere
> > on the web that system calibrations (particularly envelopes) are stored in
> > memory- is this correct?
> > 
> > Has anyone carried out this procedure?  Tips and advice would be great, tia.
>