Doepfer

Hi Diego

Am 29.06.2018 um 07:43 schrieb Diego Ragnini diegora@free.fr [Doepfer_a100]:
>
> So, if I use brand new mono Doepfer cables and the R2M black box is 
> connected via these cables to A-100 systems which are properly 
> grounded then everything should be fine, right?
>
Yes.


> What happens if one provides an external wire to connect the black box 
> to the ground/earth (not too differently from what I will do for the 
> A-100LC3 cases)?
I cannot judge at the moment, whether the housing is connected to the 
signal ground. Basically there is no need for that, as there is no 
connection between the (signal- and housing-) ground and the 
earth/ground of your wall outlets. There is no need for because the R2M 
uses a wall wart. There is no hi voltage inside the device.



> Does the ground uses the “tip” of the cable?
It does not use the tip, but either the "shaft" or the "ring". In fact: 
It is defined as to use the shaft, but it assumes the shaft of a mono 
jack, which reaches up to the "ring" position of the stereo jack. Some 
Doepfer modules are equipped with Cliff sockets. Those sockets have 
there shaft-contact at the position, where a stereo-jack has its "ring". 
There is nothing wrong with it, as it relies on using mono-cables.

>
> The MS20 also shows a 1/4 female jack labelled “GND": how do I use 
> this? And is it always the tip providing the connection?
This is a big misunderstanding opf the MS-20. This symbol means, that 
the socket will switch the tip to ground, when the corresponding 
function is active.
Example: https://www.muziker.de/image/2/0039/9lan.ms20mini_detail4_jpg.jpg
In the low right corner is a socket which is connected to the push 
button aside the keyboard. The "GND"-symbol means: "The tip of a cable 
that is plugged in here will be shortcut to ground, as soon as you press 
the button". This is the function of a so called switched trigger. 
(connect this socket with the MS-20s trigger-in-socket and you will be 
able to trigger a note).



Florian

http://www.florian-anwander.de