Standardized Values For Rv And 2 X Rv; Phantom Powering With Unbalanced Inputs - AKG C535 EB User Instructions

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3.2
Standardized
values for Rv
and 2 x Rv
3.3
Phantom
powering with
unbalanced
inputs
30
The resistors 2 x Rv must have a tolerance not exceeding 0.5 % in
order to satisfy the symmetry requirement.

Standardized values for Rv and 2 x Rv

+ U
B
12 V ± 2 V
24 V ± 4 V 1200 ohms
48 V ± 4 V 3300 ohms

Phantom powering with unbalanced inputs

If only single ended (grounded) amplifier inputs or no input trans-
formers are available, either capacitors or optional transformers
must be wired into the audio lines to prevent leakage currents from
entering the input stage.
b
a
3
1 2
2 Rv
ground
Figure 4: Phantom powering with unbalanced inputs with condensers
R
V
680 ohms
ampli er
2 Rv
2 x R
V
330 ohms
680 ohms
6800 ohms
input
+Uphantom
–Uphantom
C535 EB MANUAL
b
a
3
1 2
ground
amp
in line