Doepfer

thanks for the reply

i've removed jumpers so it acts as 4 separate vca's with no normaling and no summing...

i did some tests 
this is what i get

-run 5.47 v into vca1 input
-run 3.85 v into vca1 cv2 input
- i get   0.61 v out of vca1 output

the same thing done with the other 3 vca's give's me 1.31v , 1.37v , and 1.34v respectively ....

i guess vca1 cv2 has a dud resister or something?

sending this back (only a few months old) is probably not an option because i'm in Australia and i purchased from analoguehaven with some other stuff.... elby didnt have stock at the time... i was impatient..

maybe an easy fix for me?

is there a resister that i can check maybe?

thanks

--- In Doepfer_a100@yahoogroups.com, <yahoo@...> wrote:
>
> > -----Ursprüngliche Nachricht-----
> > Von: Doepfer_a100@yahoogroups.com
> > [mailto:Doepfer_a100@yahoogroups.com]Im Auftrag von skp_pete
> > Gesendet: Montag, 14. März 2011 11:48
> > An: Doepfer_a100@yahoogroups.com
> > Betreff: [Doepfer_a100] a-132-4 help
> >
> >
> > i noticed that cv2 input for vca 1 is way different to the other
> > 3 cv2 inputs....
> >
> > doesnt seem to be as sensitive as the other 3.  but there's no
> > trimmer for this....
> >
> > if it means anything i've removed jumpers so it acts as 4
> > separate vca's with no normaling and no summing...
> >
> > this is weird no?
> >
> > also just to be sure...- is this quad vca dc coupled?
> >
> > cheers
> 
> The VCAs of the A-134-4 are DC coupled. CV2 of VCA1 should behave like CV1
> with the trimming potentiometer for CV1 in it's max. position (i.e. no
> attenuation) or like the CV2 of the other VCAs. If that's not true please
> return the module for service to the dealer where you purchased the unit.
> Which CV is used to control the A-134-4 ? As CV1 of VCA1 is normalled to the
> other CV1 inputs the load is 4 times more than for the other inputs. Each
> load is 220k or ~ 55k for CV1 of VCA1. Normally such a load should cause no
> problems unless a control voltage source with high impedance output is used.
> 
> Best wishes
> Dieter Doepfer
>