Rolls Network Card PB23 User Guide

LIMITED WARRANTY  
PB23 Phantom  
Power Adapter  
This product is warranted to the original consumer purchaser to  
be free from defects in materials and workmanship under normal installa-  
tion, use and service for a period of one (1) year from the date of purchase  
as shown on the purchaser’s receipt.  
• Powers a condenser microphone requiring  
phantom power  
The obligation of Rolls Corporation under this warranty shall be  
limited to repair or replacement (at our option), during the warranty period  
of any part which proves defective in material or workmanship under  
normal installation, use and service, provided the product is returned to  
Rolls Corporation, TRANSPORTATION CHARGES PREPAID. Products  
returned to us or to an authorized Service Center must be accompanied by  
a copy of the purchase receipt. In the absence of such purchase receipt, the  
warranty period shall be one (1) year from the date of manufacture.  
This warranty shall be invalid if the product is damaged as a  
• 12 or 48 Volts available  
• AC adapter included  
• High frequency switching power supply to  
elliminate noise  
result of defacement, misuse, abuse, neglect, accident, destruction or  
alteration of the serial number, improper electrical voltages or currents,  
repair, alteration or maintenance by any person or party other than our  
own service facility or an authorized Service Center, or any use violative  
of instructions furnished by us.  
The PB23 is for powering a phantom powered  
microphone with either 12 or 48 VDC.The unit  
uses a 100kHz switching power supply to  
elliminate noise generated by common power  
supplies. The PB23 has pull-down resistors so it  
will work with any mixer. 2 DC jacks have been  
included so several units may be operated with  
one power supply.  
This one-year warranty is in lieu of all expressed warranties,  
obligations or liabilities. ANY IMPLIED WARRANTIES, OBLIGA-  
TIONS, OR LIABILITIES, INCLUDING BUT NOT LIMITED TO THE  
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS  
FOR A PARTICULAR PURPOSE, SHALL BE LIMITED IN DURA-  
TION TO THE ONE YEAR DURATION OF THIS WRITTEN LIMITED  
WARRANTY. Some states do not allow limitations on how long an  
implied warranty lasts, so the above limitation may not apply to you.  
IN NO EVENT SHALL WE BE LIABLE FOR ANY SPE-  
CIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES FOR  
BREACH OF THIS OR ANY OTHER WARRANTY, EXPRESSED OR  
IMPLIED, WHATSOEVER. Some states do not allow the exclusion or  
limitation of special, incidental or consequential damages so the above  
limitation or exclusion may not apply to you. This warranty gives you  
specific legal rights, and you may also have other rights which vary from  
state to state.  
Rolls Corporation  
Salt Lake City, UT  
9/95  
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INTRODUCTION  
AC ADAPTER  
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.  
MIC  
MIC  
12VDC PWR  
LOOP  
OUTPUT  
INPUT  
MIXER  
PHANTOM POWER  
ADAPTER  
PB23  
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 VOLTAGE  
12 VOLT • 48 VOLT  
C4  
47U  
47U  
2
1
2
1
J1  
J2  
XLR M PC  
C3  
3
3
XLR F PC  
R4  
R5  
6.8K  
6.8K  
C10  
503  
U1A  
4069  
C7  
C8  
C9  
.047  
.047  
.047  
2
1
2
4
SW1A  
DPDT  
U1F  
U1E  
U1B  
U1C  
4069  
13  
12  
11  
10  
3
5
48V  
1
3
12V  
MIC  
OUTPUT  
MIC  
INPUT  
12VDC PWR  
LOOP  
4069  
4069  
4069  
R3  
10K  
R1  
22K  
6
4069  
U1D  
9
8
C10  
120PF  
D6  
D5  
D3  
D7  
D4  
D2  
C5  
1U  
C11  
1U  
C6  
1U  
1N4148  
1N4148  
1N4148  
1N4148  
1N4148  
1N4148  
U2  
7812  
J3  
2
3
1
1
3
I
O
G
C2  
1 UF  
2
C1  
JAPDC  
PHANTOM POWER  
ADAPTER  
PB23  
1000UF  
D1  
1N4001  
ROLLS CORPORATION  
Title  
PB23 PHANTOM BOX  
PB23.SCH  
Size  
Document Number  
REV  
A
Date:  
September 4, 1995  
Sheet  
of  
SPECIFICATIONS  
PhantomVoltage:  
Jacks:  
PHANTOM VOLTAGE  
12 VOLT • 48 VOLT  
12V or 48V selectable  
Male and Female XLR jacks,  
2:5mm DC input jacks  
Control:  
Power Input  
Size:  
12/48 volt selector switch  
14 - 18VCD (adapter included)  
3" x 2.5" x 1.25"  
Weight:  
1 lb (.45 Kg)  
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