sub oscillation

isak

Hi guys

i want to add a sub oscillation to the sound lab plus, there are a lot of desings in the net, if any one here have experience with how to do it and what desing to use i'm sure that every one here will be happy to hear about it.
any info will be much appreciated by every noob here including me Mr. Green

thanks,
Isak.

if837 · Joined: Apr 12, 2009 Posts: 56 Location: sweden

roland sh09 uses a sub oscillator, you could perhaps start with looking at the service notes. I´m also interested, to know if someone has figured out the partslists for SH09 with suggestions for replacements.
Maybe BA6110FS could be used for replacing some of the IC´s in the VCO?

http://www.electromusic.com/takeout/sh09.pdf

RF · Posted: Thu Feb 11, 2010 9:56 am Post subject:

I've built and used this one - although it's more than just a subOsc...it gives you several divisions of the input frequency, and the ability to mix them...

I like it alot....
Just leave off the 4040 sectionif you don't need those pulse outputs...

http://www.freeinfosociety.com/electronics/schemview.php?id=112

Here's another - I had not seen this one before.
http://home.comcast.net/~sbernardi/elec/og2/og3_sine_suboctave.html

The last page of this pdf has a simple one or two octave subOsc schematic..
http://www.synthdiy.com/files/2001/madm.pdf

...and then there is this snippet posted below... might need to dress it up a bit... it's pretty bare.

bruce

osc_subosc.gif

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isak · Posted: Fri Feb 12, 2010 12:34 am Post subject:

Hi RF and thanks for the info Smile

can i use the first link in the soundlab plus ? i mean to connect it to the pcb somehow..?
did you made the sub with a stripboard?
can u please upload the stripboard diagram? (if u did)
million thanks RF Smile

Isak.

RF · Posted: Fri Feb 12, 2010 11:03 am Post subject:

Hi isak -
I just built it on perfboard....sorry.

I'm certain you could build it into your Soundlab - You probably want to be able to switch it in or out, right?

Take a look at the instructions on MFOS for patching out your Soundlab.

bruce

isak · Posted: Sat Feb 13, 2010 3:43 pm Post subject:

Hi bruce and thanks for u'r reply.

i will look and try to understand how do it.

thanks again,
Isak.