Doepfer

Hi,

  can anyone tell me how to do the following mods:

  A141 - reduce the attack, delay and release values to give very fast
responses ( I find the module too slow to use).

  A151 - install a switch like the new version to select 2, 3 or 4 steps.

Many thanks

Stuadh

> Hi,
>
> can anyone tell me how to do the following mods:
>
> A141 - reduce the attack, delay and release values to give very fast
> responses ( I find the module too slow to use).

replace the capacitor C2 (now 100uF/0.1uF, next to CA3080) by a smaller
value. E.g. 10 nF will reduce the shortest time by 10.

> A151 - install a switch like the new version to select 2, 3 or 4 steps.

center terminal of the switch -> reset input via a standard diode (e.g.
1N4148), cathode (-) on reset socket
end terminal 1 of the switch  -> CD4053 pin 14 (LED control for I/O 2)
end terminal 2 of the switch  -> CD4053 pin 15 (LED control for I/O 3)


Best wishes
Dieter Doepfer

Hi Stuadh,

> > A151 - install a switch like the new version to select 2, 3 or 4 
steps.
> 
> center terminal of the switch -> reset input via a standard diode 
(e.g.
> 1N4148), cathode (-) on reset socket
> end terminal 1 of the switch  -> CD4053 pin 14 (LED control for I/O 2)
> end terminal 2 of the switch  -> CD4053 pin 15 (LED control for I/O 3)

In addition Peter Grenader describes how to do the mod here:

http://www.buzzclick-music.com/mods.html

Note also that I think pin 14 above should in fact be pin 11.

If interested, I can take a few snaps of how I've done the mod on mine -
 it is really straightforward!

Tim

> > > A151 - install a switch like the new version to select 2, 3 or 4
steps.
> >
> > center terminal of the switch -> reset input via a standard diode (e.g.
> > 1N4148), cathode (-) on reset socket
> > end terminal 1 of the switch -> CD4053 pin 14 (LED control for I/O 2)
> > end terminal 2 of the switch -> CD4053 pin 15 (LED control for I/O 3)
>
> In addition Peter Grenader describes how to do the mod here:
>
> http://www.buzzclick-music.com/mods.html
>
> Note also that I think pin 14 above should in fact be pin 11.

You are right. Pin 11 instead of pin 14. And the circuit is CD4052, not
CD4053. Maybe I was a bit tired ...

Best wishes
Dieter Doepfer

> 
> If interested, I can take a few snaps of how I've done the mod on mine -
>  it is really straightforward!
> 
> Tim
>
Thanks again, Tim.  A couple of snaps would be great.

Stuadh

> > If interested, I can take a few snaps of how I've done the mod on 
mine -
> >  it is really straightforward!
> > 
> > Tim
> >
> Thanks again, Tim.  A couple of snaps would be great.

Here we go - I've just cobbled together a rough page at my website, 
with a few less-than-perfect photos, but it gives you the idea:

<http://mysite.wanadoo-
members.co.uk/tstinchcombe/synth/151_mod/151_mod.html>

(maybe my 'Christmas present to myself' will be small a tripod, to make 
taking such snaps easier...)

Tim

Dieter, Tim,

  thank you very much.  I now have a little Christmas project.

Yours Aye

Stuadh

--- In Doepfer_a100@yahoogroups.com, <hardware@...> wrote:
>
> > > > A151 - install a switch like the new version to select 2, 3 or 4
> steps.
> > >
> > > center terminal of the switch -> reset input via a standard
diode (e.g.
> > > 1N4148), cathode (-) on reset socket
> > > end terminal 1 of the switch -> CD4053 pin 14 (LED control for
I/O 2)
> > > end terminal 2 of the switch -> CD4053 pin 15 (LED control for
I/O 3)

> >
> > In addition Peter Grenader describes how to do the mod here:
> >
> > http://www.buzzclick-music.com/mods.html
> >
> > Note also that I think pin 14 above should in fact be pin 11.
> 
> You are right. Pin 11 instead of pin 14. And the circuit is CD4052, not
> CD4053. Maybe I was a bit tired ...
> 
> Best wishes
> Dieter Doepfer
>