INTRODUCTION Thank you for purchasing the PB223 Phantom Power Adapter, this unit is designed to provide years of lasting value and usefulness. The unit powers up to two condenser microphones that are 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 PB223 features selectable voltage levels. OPERATION For each Mic, 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
AC ADAPTER
MIC 1 OUTPUT
MIC 1 INPUT
MIC 2 OUTPUT
MIC 2 INPUT
12VDC PWR LOOP
MIXER
DUAL PHANTOM POWER ADAPTER
PB223
PHANTOM VOLTAGE
12 VOLT � 48 VOLT
C4
47U
J1 XLR F PC
2
3
C3
47U
3
2
J2 XLR M PC
than one unit. The units provide no audio gain as they are not microphone preamps.
1 6.8K R5
R4 6.8K
1
C10 503
U1A 1 U1F U1E U1B
4069 2 4069
C7
.047
2 SW1A DPDT
13
12
11
10
3
4
C8
.047
48V
1
3
12V
R3 10K
4069
R1 22K
4069
5
U1C
4069 6 4069
C9
.047
MIC 1 OUTPUT
MIC 1 INPUT
MIC 2 OUTPUT
MIC 2 INPUT
12VDC PWR LOOP
U1D 9 C10 120PF
8 D6 D5 D3 C5 1U D7 D4 C11 1U D2 C6 1U
DUAL PHANTOM POWER ADAPTER
PB223
1N4148 1N4148 1N4148 J3 2 3 1 1 U2 7812 I G 2 O 3 1N4148 1N4148 1N4148 C2 1 UF
JAPDC D1 1N4001
C1 1000UF
ROLLS CORPORATION Title PB23 PHANTOM BOX Size A Document Number PB23.SCH September 4, 1995 Sheet of REV
PHANTOM VOLTAGE
12 VOLT � 48 VOLT
Date:
SPECIFICATIONS Phantom Voltage: Jacks: Control: Power Input Size: Weight:
12V or 48V selectable Male and Female XLR jacks, 2: 5mm DC input jacks 12/48 volt selector switch 14 - 18 VCD (adapter included) 6" x 2.5" x 1.25" 1.5 lbs (.68 Kg)
