Doepfer

i'm trying to plan out a diy case that should be the equivalent of 6 doepfer racks.  the 
building end of this project is no problem for me but i am hoping to get some advice on the 
electronics part.
i have noticed that doepfer has the diy power supplies available for purchase but i am 
assuming i would need several for a case this size.  is there a more compact solution to 
powering a rack this size?  something that will alleviate the need for several seperate power 
cables running out of the back?
I am also wondering if anyone knows where i could get a few of the rack rails that are built 
into the doepfer racks.  the diy power supplies come with hardware to attach the modules to 
the case but they would require a piece of wood between the panel rows to attach the 
hardware too.  I would prefer that the modules were edge to edge as they are when placed in 
the doepfer rack.
any advice or tips from anyone who has built their own case would be very much appreciated.  
thanks!
sam

Hi,

for my 12he DIY case I used one doepfer DIY kit, however, that powers
only up to 1200mA in total, therefore either take 2 of them to power 3
 powerrails each, or there are other solutions - you just need to find
a supply with +12 and -12V outputs and enough Amperes  (~6A in total
should do it for 18HE)

as for the hardware, i went for a 19" case, so i ordered some eurorack
parts from proma-systro in germany, or you can use whatever company I
guess. just make sure the mountingrails have 3mm screwholes, or buy
some sliding nuts with 3mm that fit into the eurorack rails.

and thats how it looks like...
http://farm3.static.flickr.com/2313/1568527450_47d2e86ad6_b.jpg



cheers,

hel.   



--- In Doepfer_a100@yahoogroups.com, "sam" <sams2cats@...> wrote:
>
> i'm trying to plan out a diy case that should be the equivalent of 6
doepfer racks.  the 
> building end of this project is no problem for me but i am hoping to
get some advice on the 
> electronics part.
> i have noticed that doepfer has the diy power supplies available for
purchase but i am 
> assuming i would need several for a case this size.  is there a more
compact solution to 
> powering a rack this size?  something that will alleviate the need
for several seperate power 
> cables running out of the back?
> I am also wondering if anyone knows where i could get a few of the
rack rails that are built 
> into the doepfer racks.  the diy power supplies come with hardware
to attach the modules to 
> the case but they would require a piece of wood between the panel
rows to attach the 
> hardware too.  I would prefer that the modules were edge to edge as
they are when placed in 
> the doepfer rack.
> any advice or tips from anyone who has built their own case would be
very much appreciated.  

> thanks!
> sam
>

Sam,
 
You could follow my lead which was to buy a large ampage linear PSU to
power the whole case.
 
A good +/-12V supply ay 3A for example will power you case (depending on
the modules used) without any difficulty.
 
In the UK I have used Amplicon and Calex. Now I have not had issues with
these supplies and my system but remember that using no approved PSU's
may cause warrenty issues with Doepfer.
 
I purchased the bus boards from Doepfer and wired them all up and no
issues.
 
For the few modules that require 5V I use the 5V adapter from Doepfer.
 
The rack rails are also available from various places including Radio
Spares and Farnel.
 
Search for Vero rack or Euro rack.
 
Rgds
 
David
 
David Salter
Senior Consultant
PSG 

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________________________________

From: Doepfer_a100@yahoogroups.com [mailto:Doepfer_a100@yahoogroups.com]
On Behalf Of sam
Sent: 19 October 2007 07:38
To: Doepfer_a100@yahoogroups.com
Subject: [Doepfer_a100] building a case, need advice



i'm trying to plan out a diy case that should be the equivalent of 6
doepfer racks. the 
building end of this project is no problem for me but i am hoping to get
some advice on the 
electronics part.
i have noticed that doepfer has the diy power supplies available for
purchase but i am 
assuming i would need several for a case this size. is there a more
compact solution to 
powering a rack this size? something that will alleviate the need for
several seperate power 
cables running out of the back?
I am also wondering if anyone knows where i could get a few of the rack
rails that are built 
into the doepfer racks. the diy power supplies come with hardware to
attach the modules to 
the case but they would require a piece of wood between the panel rows
to attach the 
hardware too. I would prefer that the modules were edge to edge as they
are when placed in 
the doepfer rack.
any advice or tips from anyone who has built their own case would be
very much appreciated. 
thanks!
sam



 


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

Sam,

you find my comments written inline.

Best wishes
Dieter Doepfer

> i'm trying to plan out a diy case that should be the equivalent of 6
doepfer racks. the
> building end of this project is no problem for me but i am hoping to get
some advice on the
> electronics part. i have noticed that doepfer has the diy power supplies
available
> for purchase but i am > assuming i would need several for a case this
size. is there a
> more compact solution to powering a rack this size? something that will
alleviate the need
> for several seperate power cables running out of the back?

A linear power supply with sufficient current/power and high stability (less
than 10mV voltage change if load changes is  recommended) should be used.
But such supplies are not cheap. Another solution would be the usage of a
high quality supply only for the VCOs (as the high stability is required
mainly for VCOs) and a second lower cost supply for the other modules.
Switching supplies are not recommended from our experience (please refer to
my messages about 2-3 weeks ago concerning our experiences with switching
supplies).

> I am also wondering if anyone knows where i could get a few of the rack
rails that are built
> into the doepfer racks.

The address of the supplier is mentioned on our website > PRODUCTS > A-100 >
Mechanical details. Maybe you canb find another supplier in your home
country.

> the diy power supplies come with hardware to attach the modules to
> the case but they would require a piece of wood between the panel
> rows to attach the hardware too. I would prefer that the modules were edge
to edge
> as they are when placed in the doepfer rack.

We are working on a new version of these special rails that can be used
without the need of the additional piece of wood. They will be equipped with
additional mounting angles at the ends and wholes to connect two rails
without the wooden piece with short screws. In addition the distance between
the threads will be 1HP (instead of 2HP). The new rails will be a bit more
expensive because of the additional mouting angles and twice the number of
threads.

> any advice or tips from anyone who has built their own case would
> be very much appreciated.
> thanks!
> sam