Doepfer

Well I use 4 a131s for audio so...
I will contact Dieter.
Thanks!


On 11/2/05, selfoscillate <synaptic_music@yahoo.com> wrote:
>
>  hello ernst,
>
>  i had this problem with one of my newer a130's as well.
>  the output of the a130 was inverted, but besides
>  this the unit worked as intended.
>  it appeared to be a wrong wiring on the pcb.
>  as long as you use the a130 for audio applications,
>  this is no problem, but it sure is a problem if you
>  use it to modify control voltages.
>  dieter fixed this issue on my a130 (i'm not good in
>  soldering things), i suggest that you contact him directly.
>
>  best wishes
>
>  ingo
>
>
>
>  --- In Doepfer_a100@yahoogroups.com, "achtung_999"
>  <heinrich.himmelwasser@g...> wrote:
>  >
>  > Some other strange thing I noticed this weekend with the
>  oscilloscope at hand..
>  > I own one a132 and two a130s. The two 130s are of different
>  generations, which I don't
>  > object to so much.
>  > What I did is the following:
>  >
>  > I patch the output of an a118 random voltage into an a172 max/min.
>  > As second input I input a constant voltage from my a176 to make
>  sure that the  max
>  > output of the a172 puts out only positive values.
>  > This goes into the vca as signal and then I take an envelope as cv
>  input.
>  > This in all the cases delivers a positive voltage output you would
>  say...
>  > However my a130 of the second generation presented a negative
>  output, to my surprise.
>  > All the other mentioned vca's behaved as expected...
>  >
>  > Is something wrong with my a130(second generation) or is this an
>  intentional design
>  > thing..?? (would be strange if you'd ask me)
>  >
>  > Greetings,
>  >
>  > Ernst
>  >
>
>
>
>
>
>
>
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