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Message

AW: [Doepfer_a100] A132-1 Troubles

2008-11-10 by yahoo@doepfer.de

> Hello list,
>
> I was wondering..
>
> I ordered an A132-1 from Thomann last month.
> I already have on for years and decided that it was time to get a
> second one.
> It arrived by mail and only the top VCA seemed to be working correctly.
> Believe me, I tested it extensively against the unit I already own.
> Nothing to be done.. I exchanged it with Thomann, no problem.
>
> Today the new unit arrived and it seems that this one has only
> the bottom VCA working!
> Are there any other people, who recently bought one having
> problems with A132-1 units?
>
> I'll test a bit more and then probably contact Thomann.. again.. sigh
>
>
> Greetings,
>
> Ernst

I'll ask in our sales department if we ever got back an A-132-1 from Thomann
for repair with this fault.
The A-132-1 is a very simple circuit (nothing but a linear controlled CA3080
OTA) and the only explanation I have is that the CA3080 used in the A-132-1
are defective. We discovered over the years that a small percentage of the
CA3080 becomes defective after a couple of weeks or months in use.

Best wishes
Dieter Doepfer

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