C535 EB MANUAL
30
POWER SUPPLY
The resistors 2 x Rv must have a tolerance not exceeding 0.5 % in
order to satisfy the symmetry requirement.
3.2
Standardized values for Rv and 2 x Rv
+ U
B
R
V
2 x R
V
12 V ± 2 V
680 ohms
330 ohms
24 V ± 4 V
1200 ohms
680 ohms
48 V ± 4 V
3300 ohms
6800 ohms
3.3
Phantom powering with unbalanced inputs
0MVUS`ZPUNSLLUKLKNYV\UKLKHTWSPÄLYPUW\[ZVYUVPUW\[[YHUZ
-
formers are available, either capacitors or optional transformers
must be wired into the audio lines to prevent leakage currents from
entering the input stage.
ground
+Uphantom
–Uphantom
2
1
3
amplifier
2 Rv
input
2 Rv
a
b
Figure 4: Phantom powering with unbalanced inputs with condensers
Standardized
values for Rv
and 2 x Rv
Phantom
powering with
unbalanced
inputs