> -----Ursprüngliche Nachricht-----
> Von: Doepfer_a100@yahoogroups.com
> [mailto:Doepfer_a100@yahoogroups.com]Im Auftrag von Martin Fay
> Gesendet: Dienstag, 25. März 2014 09:01
> An: Doepfer_a100@yahoogroups.com
> Betreff: Re: AW: [Doepfer_a100] A-148 behaving erratically
>
>
> Thanks Dieter!
>
> I'm still wondering if my unit is only handling a smaller range as I
> thought the A-110 outputs should be about +/-5V? Anyway attenuate and
> it's fine.
>
> Martin
>
> Sent from my iPhone
>
> On 24 Mar 2014, at 10:56, <yahoo@doepfer.de> wrote:
>
> > Please refer to the A-148 info page:
> >
> > "Since August 2005 an improved version of the module is
> > manufactured: For
> > each sub-module the operation mode S&H (sample&hold) or T&H
> > (track&hold) can
> > be selected by a jumper. In T&H mode the output signal follows the
> > input
> > signal while the trigger input is "high". As soon as the trigger
> > input turns
> > to "low" the last voltage is stored. The factory setting is S&H for
> > the
> > upper device and T&H for the lower device. At the bottom of this
> > page the
> > function of the jumpers is described. In addition the complete A-100
> > voltage
> > range -12...+12V can be processed (no longer limited to -8...+8V as
> > for the
> > previous version).
> > The two versions can be identified by these details:
> > Version 1: four integrated circuits (2 x CD4053, 2 x TL064 oder TL084)
> > Version 2: three integrated circuits (1x DG442, 2 x TL084), see silk
> > screen
> > at the bottom of this page."
> >
> > Maybe you own the old version with max. about +8V/-8V signal level.
> >
> > Best wishes
> > Dieter Doepfer
> >
> >
> >> -----Ursprüngliche Nachricht-----
> >> Von: Doepfer_a100@yahoogroups.com
> >> [mailto:Doepfer_a100@yahoogroups.com]Im Auftrag von Martin Fay
> >> Gesendet: Montag, 24. März 2014 10:30
> >> An: Doepfer_a100@yahoogroups.com
> >> Betreff: Re: [Doepfer_a100] A-148 behaving erratically
> >>
> >>
> >>
> >>
> >>
> >> 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
> >>
> >>
> >>
> >>
> >
> >
> >
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