Jupiter-8 part needed FIXED!

[DrTempus]

Thanks everyone for replying!

When Tony Allgood mentioned the SH-09, it made me think of a dead RS-09
I have,
and I decided to make it more dead. ;-).  (Didn't realize it had the
BA662A 
in it. I replaced it and now I have all 16 VCOs firing, YAY!, of course 
I'm not done, 2 minor problems to knock out now.

1) VCO2 sine waveform noisy
2) VOICES A,B,C,D sound brighter than VOICES E,F,G,H. I assume this 
   is narrowing the problem to a MODULE CONTROLLER, which one, 
   I not sure.


Thanks again!

I'm slowly getting closer to being ready for a midi kit.

-Allen
 www.darkaether.net 

Trevor Page wrote:
> 
> Hi,
> 
> I recently obtained a number of BA662A's from Roland in the UK without
> problems - but I did have to specify a Jupiter 8. So there's plenty in the
> UK branch. Their computer came up with nothing when I specified the part
> number that appears in the TB303's user manual.
> 
> Trev
> 
> ----- Original Message -----
> From: Tony Allgood <oakley at techrepairs.freeserve.co.uk>
> To: DrTempus <drtempus at home.com>; <synth-diy at node12b53.a2000.nl>
> Cc: <analogue at hyperreal.org>
> Sent: Tuesday, June 20, 2000 10:29 PM
> Subject: Re: Jupiter-8 part needed
> 
> > Hi all,
> >
> > Allen wrote> I am looking for Roland part number 15229802 generally
> > called: BA662A or B. Roland US said they don't have any.
> >
> > Do try Roland again. Certainly Roland UK did have them the last time I
> > looked. But try asking for BA662 and say it comes from a SH-09. The part
> > number computer at Roland UK can be very peculiar. Certainly if you ask
> > for BA662 from a TB303, you get no supply. A JP8, however, comes up
> > trumps. If the JP8 has failed this time, try another synth.
> >
> > On the other hand, it is not difficult to get a BA6110 made by R-Ohm to
> > fit. This is an updated and improved part, the orignal 662 was made by
> > R-Ohm for Roland it seems. It has different pin out but it is possible
> > to use the new part with a bit of a cludge.
> >
> > You have to handy with a soldering iron to do this. See the 2nd page of
> > the TB3030 schematics on my site for details on this. This shows how
> > either part can be used to make a typical Roland VCA. The BA662 and 6110
> > do sound the same, so long as you don't use the compensation network in
> > the input of the BA6110.
> >
> > www.techrepairs.freeserve.co.uk/projects.htm
> >
> > Regards,
> >
> > Tony Allgood  Penrith, Cumbria, UK
> >
> > Modular synth circuits, TB303 clone and Filter Rack
> >
> > www.techrepairs.freeserve.co.uk
> >
> >
> >
> >
> >
> >
> >
> >
> >