> -----Ursprüngliche Nachricht-----
> Von: Doepfer_a100@yahoogroups.com
> [mailto: Doepfer_a100@yahoogroups.com ]Im Auftrag von thomasborax
> Gesendet: Mittwoch, 16. Juli 2008 02:54
> An: Doepfer_a100@yahoogroups.com
> Betreff: 1 Re: working on Euro-format tube modules for next
> year
>
>
> a wall wart seems like a ok solution. but what i'd like to do is run
> the 5v transformer off of the same "mains-in" that the +/-12v runs off
> of. i think that's what most people with modulars would want to do.

The A-100 power supplies have additional connectors that can be used to
connect the mains of another power supply (i.e. each of the mains connectors
is available twice). We use this connectors e.g. if a second power supply
has to be installed into a frame. You have to pay attention that the fuse
value in the mains inlet has to be adapted accordingly (e.g. doubled if two
A-100PSU2 are used).

These connectors can be used to drive e.g. a +5V supply. The GND and +5V of
the +5V supply have to be connected to the GND and +5V terminals of the bus
board. But the width and thickness of the +5V track of the bus board is not
suitable for high currents as required for Erics tube modules but only for a
few hundert mA. As suggested by Eric the +5V line of the bus board has to be
"thickened" (e.g. by soldering an additional blank wire across the +5V
track).

And I have to add this remark: As these works affects parts, pc boards and
cables that conduct mains voltage (230/115V) carrying out of these works is
allowed only for experts or authorized personnel who are familiar with all
valid safety rules. Laymen are not allowed to carry out these works !
Danger to Life.

Best wishes
Dieter Doepfer