Doepfer

hi group,

can anyone suggest a way to increase the range of the cv2 input of the
a188-2 multitap bbd? it won't quite reach an octave/volt. this means i
have to use cv1, which is slightly over an octave/volt, and i'm having
to use up 8hp of valuable rackspace to attenuate it slightly.

great module, though (thanks for the encouraging words, bakis).

thanks in advance,

stu

> hi group,
>
> can anyone suggest a way to increase the range of the cv2 input of the
> a188-2 multitap bbd? it won't quite reach an octave/volt. this means i
> have to use cv1, which is slightly over an octave/volt, and i'm having
> to use up 8hp of valuable rackspace to attenuate it slightly.
>
> great module, though (thanks for the encouraging words, bakis).
>
> thanks in advance,
>
> stu

To increase the sensitivity of CV2 the value of R4 has to be reduced. R4
(47k) is located between the CV2 control and the clock socket. If you want
to change the scale the 25-turn trimming potentiometer P19 has to be
adjusted.

Best wishes
Dieter Doepfer

thanks dieter.

is there a simple relationship between the value of r4 and cv2's
sensitivity? i don't want to end up with a 0.3v/octave cv2 :)

best, stu


--- In Doepfer_a100@yahoogroups.com, <yahoo@...> wrote:
>
> > hi group,
> >
> > can anyone suggest a way to increase the range of the cv2 input of the
> > a188-2 multitap bbd? it won't quite reach an octave/volt. this means i
> > have to use cv1, which is slightly over an octave/volt, and i'm having
> > to use up 8hp of valuable rackspace to attenuate it slightly.
> >
> > great module, though (thanks for the encouraging words, bakis).
> >
> > thanks in advance,
> >
> > stu
> 
> To increase the sensitivity of CV2 the value of R4 has to be reduced. R4
> (47k) is located between the CV2 control and the clock socket. If
you want

> to change the scale the 25-turn trimming potentiometer P19 has to be
> adjusted.
> 
> Best wishes
> Dieter Doepfer
>

> thanks dieter.
>
> is there a simple relationship between the value of r4 and cv2's
> sensitivity? i don't want to end up with a 0.3v/octave cv2 :)
>
> best, stu

From the theory (i.e. if the module is adjusted to ~1V/oct for CV1) the
equation is:

scale ~ (R4+47k)/100k

e.g. if R4 is 22k the max. scale (CV2 control fully CW) should be about
0.7V/oct (i.e. a bit more sensitive than 1V/oct)

Best wishes
Dieter Doepfer