Doepfer

Hi Bakis

Like you say, I was expecting the attenuator knob to give me 0 to 2x amplification, but it gives only 0 to 1x.

With offset at around 1 o'clock position (0V offset), +4V in, switch in attenuator mode and att. knob at 10 I get +v4V out.

Rich


--- In Doepfer_a100@yahoogroups.com, Bakis Sirros <synth_freak_2000@...> wrote:
>
> the A183-2 is an attenuator/polarizer and offset generator.(and a x2 amplifier)
> 
> so, you say you want to make a +4volts input into a +4 to -4volts output, right?
> 
> so: you have set the JP3 jumper as dieter says (and now the offset knob gives you -5 to +5 volts offset), and have you set the switch to 'attenuator' position? this will give you a 0 - +2 amplification (0 - +8Volts output, from your input), if you set the 'attenuation' knob to the '10' position and the offset knob will take care of the negative offset you want (-4volts). for this you will have to set the offset knob to about the '1' position.
> 
> ok?
> 
> does it work now?
> 
> 
> 
> 
> Bakis Sirros - Parallel Worlds / Interconnected / Memory Geist
> 
> [Doepfer_a100] group owner
> 
> www. parallel - worlds - music. com
> 
> www. myspace. com/ parallelworldsmusic
> 
> www. myspace. com/ interconnectedmusic
> 
> www. myspace. com/ memorygeist
> 
> www. DiN. org. uk
> 
> www. musicamaximamagnetica. com
> 
> www. vu-us. com
> 
> --- On Fri, 10/29/10, Richard Horsman <richyho@...> wrote:
> 
> From: Richard Horsman <richyho@...>
> Subject: AW: [Doepfer_a100] A-183-2 suitable for this?
> To: Doepfer_a100@yahoogroups.com
> Date: Friday, October 29, 2010, 9:19 PM
> 
> 
> 
> 
> 
> 
> 
> Â 
> 
> 
> 
>   
> 
> 
>     
>       
>       
>       OK, so I bought one of these, moved the jumper but can't get the 2x amplification as mentioned here (http://www.doepfer.de/a1832.htm):
> 
> 
> 
> "The amplification range for the input will be probably 0...+2 in the attenuator mode, and -2...+2 in the polarizer mode, i.e. the maximum amplification will be x2 and the module can be used also to amplify CV or audio signals"
> 
> 
> 
> In my example of +4V being the input voltage, that is the max voltage measured at the outputs trying all positions of knobs and switch.
> 
> 
> 
> Please can you let me know where I'm going wrong.
> 
> 
> 
> Thanks
> 
> 
> 
> > Hi all/Dieter
> 
> >
> 
> > I have a module that puts out voltages in the range 0 to +4V. I
> 
> > would like to offset and amplify this voltage range to -4 to +4V
> 
> > (that is amplify x2 and offset by -4V).
> 
> >
> 
> > Is this the right module to do this job?
> 
> >
> 
> > Thanks
> 
> >
> 
> > Richard
> 
> 
> 
> Yes, but you have to change the position of the JP3 jumper. The factory
> 
> setting is 0...+5V offset (upper position of the jumper). You have to change
> 
> it to the lower position (-5V...+5V offset).
> 
> 
> 
> Best wishes
> 
> Dieter Doepfer
> 
> 
> 
> [Non-text portions of this message have been removed]
> 
> 
> 
> 
> 
>     
>      
> 
>     
>     
> 
> 
>  
> 
> 
> 
>   
> 
> 
> 
> 
> 
> 
>       
> 
> [Non-text portions of this message have been removed]
>