Doepfer

Further to the emails last week I've now received the problem A-148  
back. Testing it myself I've noticed that bad behaviour is related to  
the amplitude of the Smp In signal. Low enough, all good, turn it up  
and I get what seems to be false triggers with a low value taken. With  
an A-110 as source the saw/square/sine waveforms are good, but Tri  
misbehaves. Using an attenuator I could get "arcade slide" effects.

The question to the floor: is this normal for an early A-148 and what  
might fix it?

Martin

Sent from my iPhone

On 17 Mar 2014, at 12:16, Martin Fay <martin@martinfay.com> wrote:

> I'm the seller, and to give further background I also saw this  
> behaviour some time ago, which stopped happening after rearranging  
> modules.
>
> Martin
>
> Sent from my iPhone
>
> On 17 Mar 2014, at 11:15, <richyho@virginmedia.com> wrote:
>
>>
>> Hi
>>
>>
>> I have picked up a second-hand A-148 Sample and Hold module and  
>> it's not working correctly. When fed with white noise and a steady  
>> clock it triggers more times than it should, semi-randomly (not in  
>> time with the clock). Also it doesn't hold the voltage once no more  
>> triggers are received, it quickly leaks down to 0 volts. It's a  
>> very old unit made in 1995. It has no T&H/S&H option jumpers and  
>> also has flat-fronted LEDs.
>>
>> Anyone seen this problem before?
>>
>> Thanks
>>
>> Rich
>
>