Doepfer

In a message dated 4/22/2006 12:39:07 AM Pacific Standard Time,  
vliesgaard@yahoo.com writes:

If I  patch the pulse of a A-111 vco into it, it has troubles tracking
the pitch.  

If I amplify/buffer the pulse with the A-133 polarizer its  ok.

Is there a solution to this problem?





hello - 
i believe the problem is related to the a-111 vco pulse output - it may  
require some sort of buffering to work correctly. if i recall correctly, as i no  
longer have an a-111 vco, there is a similar problem using it with the a-117  
digital noise module - ? - 
have you tried it with an a-110 vco ? does the problem disappear or still  
continue ?
best,
dave
 
 
 


[Non-text portions of this message have been removed]

--- In Doepfer_a100@yahoogroups.com, davevosh@... wrote:
>
>  
> In a message dated 4/22/2006 12:39:07 AM Pacific Standard Time,  
> vliesgaard@... writes:
> 
> If I  patch the pulse of a A-111 vco into it, it has troubles tracking
> the pitch.  
> 
> If I amplify/buffer the pulse with the A-133 polarizer its  ok.
> 
> Is there a solution to this problem?
> 
> 
> 
> 
> 
> hello - 
> i believe the problem is related to the a-111 vco pulse output - it
may  
> require some sort of buffering to work correctly. if i recall
correctly, as i no  
> longer have an a-111 vco, there is a similar problem using it with
the a-117  
> digital noise module - ? - 
> have you tried it with an a-110 vco ? does the problem disappear or
still  
> continue ?
> best,
> dave
>  
>  
>  
> 
> 
> [Non-text portions of this message have been removed]
>

Hi Dave,
It seems that you are right. 
All my other vco's work as expected.
And the saw of the A-111 works properly to.
I guess I have to use the saw instead.

Thanks for the reply.

Greetings Dirk.

Dave,

you are right. It's the same matter. The rectangle output of the A-111 is AC
coupled (capacitor between the rectangle output of the CEM3340 and the
socket). This leads to problems with npn transistor input stages like the
A-117 or the A-113 clock input. There is a simple solution: the capacitor
C10 has to be shorted e.g. with a short wire or a solder blob. C10 is
located on the small adapter board that holds the 4 output sockets near the
10 pin connector. We think about replacing the AC coupling capacitors of the
A-111 by wires but have to check first if this may cause problems in other
applications.

Best wishes
Dieter Doepfer

> -----Ursprüngliche Nachricht-----
> Von: Doepfer_a100@yahoogroups.com
> [mailto:Doepfer_a100@yahoogroups.com]Im Auftrag von davevosh@aol.com
> Gesendet: Samstag, 22. April 2006 13:59
> An: Doepfer_a100@yahoogroups.com
> Betreff: Re: [Doepfer_a100] A-113 input sencetivity/tracking problems
>
>
>
> In a message dated 4/22/2006 12:39:07 AM Pacific Standard Time,
> vliesgaard@yahoo.com writes:
>
> If I  patch the pulse of a A-111 vco into it, it has troubles tracking
> the pitch.
>
> If I amplify/buffer the pulse with the A-133 polarizer its  ok.
>
> Is there a solution to this problem?
>
>
>
>
>
> hello -
> i believe the problem is related to the a-111 vco pulse output - it may
> require some sort of buffering to work correctly. if i recall
> correctly, as i no
> longer have an a-111 vco, there is a similar problem using it
> with the a-117
> digital noise module - ? -
> have you tried it with an a-110 vco ? does the problem disappear
> or still
> continue ?
> best,
> dave
>
>
>
>
>
> [Non-text portions of this message have been removed]
>
>
>
>
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