Doepfer

Hi,

The question was "can I have a power supply that works on 2 voltages"

"Is there a reasonable way to have a 6u suitcase frame work with both 230
and 115
volts? IE, I want to be able to play it in Europe and the States.

From checking the previous discussions, I understand that a switching power
supply has been tested and proven problematic. But is there an actual
solution?
Could two separate power supply units be installed in the suitcase, for
example?
Or an external power supply? One installed for 230V and another external?

I am based in Europe, so most of the time I'll need 230V.
Step up transformers tend to be not very portable..."

There is nothing there to say they have a Doepfer power supply.

My answer states that for it to work, the power supply must have a
transformer with dual primary windings and have a proper `mains selector'
switch fitted so that they can select between the 2 voltages.

The modification on the Doepfer pages is a fixed modification and would have
to be done each time you change country! A switch is a much neater solution.
Obviously, if you have a Doepfer supply, then using the modification as a
guide you would wire a switch in place of the `shorts'.. If you don't have a
Doepfer supply then you need to make sure that you follow the original
answer  if you do it yourself then yes you MUST follow ALL the safety
standards.

I still think my answer was correct but thanks for the feedback anyway :)


Best Regards
Laurie Biddulph
Mobile: 0400 257 645
Web: www.elby-designs.com


-----Original Message-----
From: Doepfer_a100@yahoogroups.com [mailto:Doepfer_a100@yahoogroups.com] On
Behalf Of Florian Anwander
Sent: Monday, 21 March 2011 10:41 PM
To: Doepfer_a100@yahoogroups.com
Subject: Re: [Doepfer_a100] 230/115V?

Hi Laurie

> Easy, get a (build) a power supply that uses a transformer with  dual
> primary windings (2 x 115VAC) and a suitable mains selector switch which
> simply puts the windings in parallel or series. 

It is not necessary to build a new one:
http://www.doepfer.de/faq/a100_faq.htm#Modification%20mains%20voltage
Nevertheless this should be done definitely only by knowledged experts 
and or authorizied technicians.

Florian


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