Bogen CHB 35A Operating Manual

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BOGENO

The Challenger Series

MODEL CHB35A

35 WATT PUBLIC ADDRESS AMPLIFIER

LEARSIEGLER, INC. @0
BOG N DIVISION

P a Box son
PARAIL'S. N I mu

INSTAllATION AND OPERATING MANUAl

READ THOROUGHLY BEFORE OPERATING EQUIPMENT

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INTRODUCTION

The model CHB35A is a general purpose 35
watt public address amplifier. It features five
separate inputs with facilities for selection and
mixing of up to three inputs. A master volume
control provides control of overall gain. Separ-
ate Bass and Treble controls are incorporated for

adjusting tonal balance.

Outputs are provided for all standard speaker
impedances and for operation with 25 volt and
70 volt long line speaker systems. Two quick-dis-
connect plugs permit quick connection 01 speaker
system.

TECHNICAL SPECIFICATIONS

USEABLE POWER: 35 watts at 5% distortion
FREQUENCY RESPONSE: 20 to 20,000 Hz ,
:zdb
HUM 8: NOISE:
MIC Input: 65db below rated power
AUX Input: 80db below rated power
GAIN:
MIC Input: 125db
AUX Input: 100dh
MAG Phono Input: 115Gb
SENSITIVITY:
MIC Input: 4 millivolts
AUX Input: 0. 2 volts
MAG Phono Input: 12 millivolts
INPUTS: 2 microphone (high impedance). 1 mag-
netic phone and 2 auxiliary (high impedance,
high level)
OUTPUTS: Speaker - 4,8 and 16 ohms, 25 volt
(18 ohms)and70volt(143 ohms)line. 2 Quick

Disconnect type sockets and connectors pro-

vided, in addition to screw type terminals.
TONE CONTROL ACTION:

TREBLE: +10 to --16db at KHZ

BASS: +14 to -10db at 50 Hz

CONTROLS:Microphone No. 1 Volume, Input 2
Volume, InputZ Selector Switch, Aux 1/,2 Vol-
ume, Master Volume, Bass, Treble, Power
and Balance Adjustment. Provisions for Re-
mote Volume Control of Mic 1 and Mic Z/Mag
Phono.

TUBES: Total of 5 - 6EU7, 12AX7, 6C4,
2 - 7868 and 3 silicon diodes.

POWER CONSUMPTION: 125 watts 105 - 125
Volts, 50 to 60 cycles

DIMENSIONS: 15-3/ "wide, 6-3/4" high, 10"
deep

WEIGHT: 18 lbs.

ACCESSORIES

MODEL SR-2 REMOTE CONTROLLER

Permits the user to control the gain of the
Mic 1 and Mic Z/Mag Phono inputs from dis-
tances up to 2,000 feet from amplifier without
sacrificing power or signal quality. Allows you
to mix and fade the two signal inputs.

MODEL LK-5 LOCKING PLATE

Model LK-5 locking Plate is designed to pre-
vent unauthorized tampering with controls of amp-
lifier. Comes complete with instructions and a
set of two keys. As a safety factor, key cannot
be removed when lock is in open position.

MODEL LPG-4 PHONO PLAYER TOP

Model LPG-4 is a complete 4-speed phono-
player designed to be mounted directly on top of
amplifier. The unit comes complete with all nec-
essary hardware. It can be easily installed and
connected to amplifier with only a screwdriver.
It includes a. 4-speed vibration-isolated turntable
and tone arm housing a dual-Styli tumovercan
tridge.

MODEL WMT-l LINE MATCHING
TRANSFORMER

Used with this amplifier for distribution of
background music directly from a leased tele-
phone line, wired music systems, or any 0 level
Sal/600 ohm line. Provides an impedance match
between balanced line and high impedance input
of amplifier. The WMT-l has a 3-screw terminal
strip for input connections and a shielded cable
terminated in a phone plug for output. No wiring
or soldering required to connect it to amplifier.
Preodrilled holes are provided for quick mounting.

RPK-l4 RACK PANEL

The Bogen Mode] RPK-14 rack panel kit
has been designed to mount the CHB35A amplifier
in a standard 19 x 7" cabinet rack. The rack
panel is fabricated from 1/16 thick cold-rolled
steel and is finished in gray metalustre enamel.