Ground lift switch – Brauner Microphones Valvet User Manual
Page 7
The ground lift switch is located on the back of
the power supply. It detaches the ground pin
(Pin 1) of the XLR output from ground. Safety
earth is of cause never detached in any positi-
on! You should under no circumstances detach
the safety earth from any of your cables or plugs.
This can lead to lethal accidents and any war-
ranty or liability is lost. By using the ground lift
switch you can solve hum problems caused by
potential differences as might occur in location
recordings or when the equipment you use is
supplied with power from different sources.
To avoid hum problems, you should be sure to
use proper power and wiring techniques, with
one central ground and earth potential and no
ground loops in between.
The positions are as follows:
H (Hard-Ground)
The ground pin (Pin 1) of the XLR connector is
conductively connected to the ground center of
the internal circuit.
L (Ground-Lift)
The ground pin is completely disconnected
from the ground.
S (Soft-Ground)
The ground pin is connected to the ground via
a safety capacitor that decouples the AC portion
of the hum to ground.
GROUND lIFt SwItCH