Thanks Dieter, nice to have yr feeling about it...



Best,



Alexandre

--- In Doepfer_a100@yahoogroups.com , <hardware@...> wrote:
>
> > Hello,
> >
> > I am a annoyed when using A133 or A163 or A143-1... modules that
> > have polarizer
> > function.
> >
> > Because I find it nearly impossible to find the 0.
> >
> > I mean for example if I put a lfo wave in A133 and patch this
> > into CV1 of A111... its nearly
> > impossible to not have the VCO freq. affected at all... even when
> > trying to settle the A133
> > on ZERO.
> >
> > DOES ANYONE UNDESRTAND WHAT I AM SAYING
> >
> > Dieter, do you get my point
> >
> > I dont know, maybe we should have button that have a fixed
> > position for ZERO position
> >
> > or a switch to make it ZERO...
> >
> > Its really bothering me recently in some precise adjustement in a patch...
> >
> > Best,
> >
> > A
>
> To speak the truth I've never been a friend of polarizers. For me in person
> the adjustability is not good enough as one has only about 130 degrees
> rotating angle for the whole range (positive or negative). If polarity
> change is wanted I prefer the version of the A-188-1 (three position switch
> negative/off/positive) though it's more expensive and requires more space at
> the front panel. But the customers asked for the polarizer function for CV
> inputs and this is why we introduced the polarizers in a couple of modules
> during the last time. In the first modules with polarizers normal
> potentiometers were used (i.e. without center terminal and center detent) as
> our potentiometer manufacturer was not able to supply such special
> potentiometer types. But in the meantime we found a manufacturer who is able
> to supply us with the special potentiometers with center terminal and center
> detent (both are necessary). The first module where we used this new type of
> potentiometer was the tapped BBD module A-189-2. Unfortunately for this
> potentiometer type a totally different electronic circuit is required
> compared to the potentiometers without center terminal. In addition the
> dimensions are different as the additional terminal is on top of the
> potentiometer which requires additional distance to the next part on the
> front panel. Consequently the old potentiometers with polarizer function
> cannot be simply replaced by the new ones because of electronical and
> mechanical reasons. But it should be possible to modify a polarizer so that
> it works as a normal attenuator again. I'll take a look at the circuits of
> the modules in question and report back.
>
> Best wishes
> Dieter Doepfer
>