Doepfer

I have a 115v G3 case which was sold to me as having a PSU2 power supply in it. And the 
board does indeed say "Power Supply II" on it. But it has a square rather than "hockey puck" 
transformer and the installed fuse is 250mA.

So does this square transformer PSU2 deliver 1200mA or is this some kind new lower amp 
variation? Because I've read in the  the A-100 Intro pdf file says the PS2 is supposed require a 
500 - 630mA fuse. 

I've not had any problems but I'm guessing there's a discrepency somewhere.

> I have a 115v G3 case which was sold to me as having a PSU2 power
> supply in it. And the
> board does indeed say "Power Supply II" on it. But it has a
> square rather than "hockey puck"
> transformer and the installed fuse is 250mA.
>
> So does this square transformer PSU2 deliver 1200mA or is this
> some kind new lower amp
> variation? Because I've read in the the A-100 Intro pdf file says
> the PS2 is supposed require a
> 500 - 630mA fuse.
>
> I've not had any problems but I'm guessing there's a discrepency
> somewhere.

If the psu board is equipped with a black rectangle transformer (instead of
the round toroid type) it is the psu board that outputs only 650mA and a 250
mA fuse is the right one. I have no explanation why the label on the rear
panel says "PSU II/500mA". Maybe the PSUs have been swapped from two back
panels.

For a A-100G3 the power supply with 650mA is sufficient. I can't imagine a
collection of modules built into the G3 that requires more than 650mA.

Best wishes
Dieter Doepfer

Thanks again for your help.

I did contemplate swapping PSUs with a portable case containing an NT12. 

Before I did anything  I was at the time concerned with verifying that the fuse would be 
correct when switched when I discovered I might have a different rated PSU2 from what's 
documented online. 

So I was a bit puzzled and annoyed that firstly I'd never seen any info that a 650mA PSU2 
existed coupled with the situation that I purchased the unit thinking I was getting a 
1200mA rated power supply that I could potentially use in another case. 

To avoid any confusion this is what I have.

A G3 case with stickers on the back saying 115V and to use a 0,25A fuse.  Inside the case 
the power supply PCB clearly says and is an "A-100 Power Supply II" but has the square 
transformer on it.  

The system works fine and it does make sense that a 650mA supply for a G3 is sufficient. 

The confusion for me was because all the web pages and pdfs I've looked at on the 
doepfer.de site or at analoguehaven.com say that PSU2's output is 1200mA.

But as Dieter recently mentioned, I know now it's 650mA because the transformer is 
square.

this page I looked at may contain a discrepency
http://www.analoguehaven.com/doepfer/a100g3/
I'm not the original owner of my G3 but it was purchased from Analogue Haven. Their 
page mentions a 1200ma rating and shows the older NT12 in the jpg photo, something 
that the doepfer.de page mentions. But I take it that this lower rated PSU2 is what is 
delivered.

> A G3 case with stickers on the back saying 115V and to use a 0,25A fuse.
Inside the case
> the power supply PCB clearly says and is an "A-100 Power Supply II" but
has the square
> transformer on it.

The pcb board labelled "A-100 Power Supply II" is suitable for both versions
of transformers. During the transition period (i.e. the time when two types
of supplies were available) both types of transformers could be mounted to
the board labelled "A-100 Power Supply II".

Best wishes
Dieter Doepfer

hi,

> this page I looked at may contain a discrepency
> http://www.analoguehaven.com/doepfer/a100g3/

It does. The discrepency is that the text mentions a 1200mA psu while 
the photo shows the older, 650 mA version. The reason is because we 
never had time to take a new photo. The G6 page also has the older-
style PSU in the photo. The pics were copied from Doepfer's site in 
the beginning.

> I'm not the original owner of my G3 but it was purchased from 
> Analogue Haven. Their page mentions a 1200ma rating and shows the 
> older NT12 in the jpg photo, something that the doepfer.de page 
> mentions. But I take it that this lower rated PSU2 is what is 
> delivered.

The 1200 mA PSU2 is the only power supply available now. So even a G3 
case comes with the PSU2 now, even though it is not really needed. 
This has helped streamline costs a bit also (i.e. buying more of one 
quantity than spreading the numbers across multiple pieces).

Thanks,

Shawn Cleary
www.analoguehaven.com

I was debating not mentioning the wrong photo. I don't think that's significant at all and 
the Doepfer.de site points out it's an old photo anyway.

Let me get to what I think is significant.

Dieter - 

Thanks again for your info. I was just trying to point out that (prior to your post to this 
list) I saw no online info about the 650mA rated PSU2. So I was initially puzzled by it 
because it doesn't say either 1200mA or 650mA on it and the web had no info it existed.


Shawn- 

Were you aware that there are PSU2s (not NT12s) that are built to deliver 650mA rather 
than the well documented 1200mA?

I wasn't aware until I realized the PSU2 (not NT12) in my just sold G3 case was a 650mA 
unit rather than 1200mA PSU2. 

Everyone-

I just thought it was useful info to know that some PSU2s are 1200mA units and some are 
650mA. Previously I had assumed they were all 1200mA.  

 As Dieter pointed out, it's the round transformer that is 1200mA rated. The "Power Supply 
II" written on the board would not be the determining factor.

(P.S. for anyone reading this, the G3 case I posed for sale the other day has been sold -- 
not that there was anything wrong with it, it's because I bought a portable case and didn't 
need a G3 at this time.)