Rolls PB23 - Manual (Page 2)

INTRODUCTION
Thank you for purchasing the PB23 Phantom Power Adapter, the unit is
designed to provide years of lasting value and usefulness. The unit
powers a condenser microphone that is designed for phantom powering.
Phantom power microphones provide much greater dynamic range, lower
noise and better sound quality. Most microphones will operate at full
performance with 12 volts DC, however some mics require 48 volts which
was the old tube mic standard. The PB23 features selectable voltage
levels.
OPERATION
Switch the PHANTOM VOLTAGE to the appropriate setting. Connect a
condenser microphone to the input connector(s) and connect the
output(s) to a mixer or other audio input device. Apply power to the unit by
connecting the enclosed adapter to an AC outlet and to the 12VDC
Power Loop. The LED on the front of the unit will light. The two DC input
jacks are provided in order to use one power supply to power more than
one unit. The units provide no audio gain as they are not microphone
preamps.
PHANTOM POWER
ADAPTER
PB23
MIC
OUTPUT
MIC
INPUT
12VDC PWR
LOOP
PHANTOM VOLTAGE
12 VOLT • 48 VOLT
AC ADAPTER
MIXER
PHANTOM POWER
ADAPTER
PB23
MIC
OUTPUT
MIC
INPUT
12VDC PWR
LOOP
PHANTOM VOLTAGE
12 VOLT • 48 VOLT
1
2
3
J2
XLR M PC
C4 47U
C3 47U
1
2
3
J1
XLR F PC
R5
6.8K
R4
6.8K
C10
503
1
2
3
SW1A
DPDT
C7 .047
1 2
U1A 4069
R1
22K
13 12
U1F
4069
R3
10K
C10 120PF
11 10
U1E
4069
3 4
U1B 4069
5 6
U1C 4069
9 8
U1D 4069
C9 .047
C8 .047
48V 12V
C6
1U
D2
1N4148
C5
1U
C11
1U
D3
1N4148
D7
1N4148
D4
1N4148
D6
1N4148
D5
1N4148
2
3
1
J3
JAPDC
D1
1N4001
I 1
G
2
O 3
U2 7812
C1
1000UF
C2
1 UF
Date: September 4, 1995 Sheet of
Size Document Number REV
A PB23.SCH
Title
PB23 PHANTOM BOX
ROLLS CORPORATION
SPECIFICATIONS
Phantom Voltage:
12V or 48V selectable
Jacks: Male and Female XLR jacks,
2: 5mm DC input jacks
Control: 12/48 volt selector switch
Power Input 14 - 18 VCD (adapter included)
Size: 3" x 2.5" x 1.25"
Weight: 1 lb (.45 Kg)