Doepfer

replies within...

--- In Doepfer_a100@yahoogroups.com, "n keller" 
<nirokesan@h...> wrote:
>
> Hey peter....!
> Funny you should reply, I was on your site last night to see if 
you had 
> instructions/plans for how you built your frankencase.

My site's actually up?  That's a switch! 

 If you want to make my cabinet, it's really very easy.  the main 
cab cost me $35 US, not including another $20 for the paint job.  
Basicallty I designed the side panel shape in Freehand, took it to 
my local Kinko's and had a full size printout done.  I bought  3/4 
inch MDF, had it cut into squares the same size as the printout 
got that and rubber cemented it right to the side of the material 
and used an electrical jigsaw and just cut out the line - totally 
simple.  I just put the rubber cement under the printed line so it 
wold be easy to peel - i didn't slap it on like wallpaper with rubber 
cement over every inch of the backside, that wold have been a 
mess. The rubber cement sands off in a second once it's cut out 
and the paper removed.  I then used the cut out piece as the 
template for the other side - traced with a pen around the cut 
piece to the uncut one and repeated the process.  The important 
thing to remember is when  you sand them, stack and clamp  
them next to each other and sand both at the same time - this 
way they end up identical.  Use a power sander, you'll be able to 
smooth everything out perfectly.


I've still got the Freehand file, which I can convert to a PDF for you 
if you don't sport that program.  Tell me if you're interested, I'll 
send it on over.


>    So here's the deal.  I built  SIX custom cabinets, which stack 
together 
> to make a  two franken-towers.   Top four cabinets hold a G6 or 
more each 
> with its own PSU, just like they come new.
> 
>    Now the bottom two cabinets are a bit different as they are 
very shallow 
> because of the angle.  They required that I make some custom 
rack ears and 
> mounting rails.    I took the bus boards from two G6 cases ( 
these cases are 
> no longer being used, right now anyway) and mounted them in 
the new 
> cabinets.  I took the PSUs from the two G6s and mounted them 
also.   One of 
> the G6's was bought used and did not have the MAINS INLET, 
also the cabinet 
> is too shallow to mount the G6 back plate which normally 
holds the switch.   
> Oh,  also both cabinets will eventually have two rows of 
modules each and I 
> thought that might be too much for one PSU2.

You can use any old switch and fuse holder if fit  or mounting is a 
problem.  If you do that - the power switch and fuse goes on one 
side of the AC to the Doepfer transformer - the other side of the 
AC goes directly from the wall to the transformer.  The wall 
ground  (called cold water pipe gorund) needs to attach as it was 
with the Deopfer assembly - I believe that's  going to the gorund 
output of the PSU and to the chassis (metal), right?    This is 
done to meet Euro power regulations (grounding the faceplates 
of the units).  

If its the old type PSU, it's good for what...600 mA  I think.  The 
new one is over twice that.  The current draws are listed on the 
module pages on the Doepfer site.  just add those up and bang - 
there's your answer. 
> 
>   SO.............  I thought it would be best to steal the mains power 
from 
> one G6's mains switch and run the wires to the other PSU.   Or 
I should get 
> another mains switch with fuse, I just want to get things 
running asap.  All 
> the wiring is done, good mains cable stuff.  Just waiting for an 
answer so I 
> don't start a fire or something.

The Doepfer PSU has the best heast sink configuration on the 
planet - those things are HUGE.  Don't think a fire will occur, 
unless the unit is mounted in some totally airless environment 
and mounted to something which will catch on fire at the 
slightlest raise in temoprature.  Just make sure there is air flow 
over the blades of the heatsink (vent holes if in a box, or a 
backless cabinet is even better.

Once you get it all wired up and fused and everything - turn it one 
WITHOUT ANY MODULES installed.  carefully read the voltages 
at all the backplanes to make sure the ight voltage is coming 
from the right pins on the power connectors.  really take yur time 
with this.  install one module to each of the powerplanes, repeat 
the the process.  If those all light up fine, chances are you've 
done it right.

As afar as the fuse value - what is your wall voltage?  115 at 60 
hZ, 50 hZ?  220 at 60 hZ - all this effects what fuse value to 
install.


> 
> Thanks
> 
> nick
> 
> 
> 
> 
> >From: "(i think you can figure that out)" <peter@b...>
> >Reply-To: Doepfer_a100@yahoogroups.com
> >To: Doepfer_a100@yahoogroups.com
> >Subject: [Doepfer_a100] Re: using mutliple PSUs in custom 
frames......
> >Date: Tue, 25 Oct 2005 03:26:48 -0000
> >
> >Installing two PSUs in one cabinet may require a higher fuse.   
It
> >all depends on what you're powering.  The second unit itself 
will
> >draw minimal current with no load on it.  If nothing else make
> >sure you don't use a fast slow fuse,  the increased power-on
> >serge from the two may take it out  and that has nothing to do
> >with the load - it's just the jolt of the initial electrical serge into 
the
> >system.
> >
> >Question is...why do you need to add a second supply?  The 
new
> >one is over an amp, yes?...plenty powerful for any 
combination
> >you can fit into a single cabinet.  Hell, I beat you you could 
power
> >two cabinets with one of those guys.  Possibly you're
> >constructing a cabinet without a supply in it and housing it's 
PSU
> >this other box?
> >
> >If it is going into a the same cab, one thing you don't want to 
do
> >however is mix the outputs of the two supplies on the power 
rail.
> >This would very bad!  If you stick two PSUs in one rack, get a
> >second power busboard.
> >
> >- P
> >
> >
> >
> >  --- In Doepfer_a100@yahoogroups.com, "Nicholas Keller"
> ><nirokesan@h...> wrote:
> > >
> > > Hey.
> > >
> > >  Now I know this stuff is "Suitable for qualified personnel 
only
> > > because of electrical safety (dangerous mains voltage 
115V /
> >230V)",
> > > but I'll ask anyway......
> > >
> > >   I want to have two PSUs ( a PSU2 and an older NT12) fed 
by
> >the same
> > > mains switch.  DO I HAVE TO INCREASE THE FUSE or 
not?  I
> >notice that
> > > the instructions for installing the +5V psu doesn't mention a
> >change
> > > of fuse.  Can anyone give input, especially someone who 
has
> >built such
> > > a custom psu array?
> > >
> > >   thanks
> > >
> > > nk
> > >
> >
> >
> >
> >
> 
> 
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