Bogen CHS 60A Operating Manual

Page 1

BOG E N.
FLEX-PAK AMPLIFIER

MODEL CHS-bOA

OPERATING AND INSTALLATION MANUAL

DESCRIPTION

liogen Model (HS-00A llex-Iak public address arrrplifiet
Is a frilly transistori/ed prearnp-mixer-amplititer trnit. rated
at (10watts.

Two input channels are provided for higlr~impedanee or'
low-impedance unbalanced microphone inputs. Both chan-
nels may be converted for rise wrtlr low-impedance balanced
rmerophone inputs by means of liogen plug-in transformer
accessories. One of these channels may also be It
magnetic plrono or tape head inputs. An optional ac
designed to ntorrnt on the front panel ol Ilre amplifier
provrdes two additional microphone input channels. These
added channels Irave all the capabilities of the basic
channels, and the same aecessorre. are applreable to them.

Two auxiliary channels, wItlr separate controls. are
provided on tile amplifier for a tuner. tape recorder. or
phonograph willr a ceramic cartridge,

()ne microphone channel and the auxiliary channels may
be remotely controlled or overridden (via optional acces-
sories) for special announcements over another microphone
channel.

This amplifier features a built-in compressor circuit
which operates on the Ml(' input channels to provide
relatively uniform output front the amplifier regardless of
vanatrons lit the Ml(' input levels. This is particularly
important in speech applications, where a microphone may
be used by a number of people with varying voices and
microphone techniques. A push-pull switch inserts or
disconnects the compressor circuit.

IN and (WT receptacles are provided for easy connection
of a reverh unit or acoustic equalizer filters to the amplifier.

Provision is made for using a transformer accessory to
feed a signal from a 500/600 ohm telephone line into the
amplifier or to connect the output of the amplifier to a
SOD/(100 ohm telephone line.

An output terminal strip at the rear of the amplifier
provides standard balanced or unbalanced 8 and |(>-ohm
speaker taps. as well as connections for 25-volt center-
tapped and 70-voll speaker lines. Two jacks provide for
rapid and convenient connections to speakers.

The output of the amplifier can also be connected from
the tape/booster jack to a tape recorder or booster
amplifier.

A bridging output jack provides for increasing the
number of inptrt channels by interconnecting the bridging
jacks of two CHS-A amplifiers.

-TECHNICAL SPECIFICATIONS-

POWER OUTPUT (RMS at I000 Hz): (10 watts.

FREQUENCY RESPONSE: ! 2 dli 70 III. to IE klI/..

SENSITIVITY (FOR RATED OUTPUT): AUX.
0.3V; Bridging, mV ; Ill-7. Mic. 3 HIV; Low Z
unbalanced. 0.3 mV: low I balanced. 0.3 rnV.

HUM ANI) NOISE (BELOW RATED OUTPUT):
Ml('. 00 dB: AUX. 70 dll.

INPUT IMPEDANCES: 3 Hi Z (50k) Ml(' inputs
caelr. ('onvertihle to Low /. unbalanced (300
ohms) and Low I balanced wrtlr plug-in accessory
transformers. 2 AUX (500k): Bridging (look);
Reverb Input (10k); Ml(' 2 convertible to magnetic
rnpnt (50k).

OUTPUT IMPEDANCES: X, ltt-ohm speaker taps;
15V center tapperH [04 ohms) and 70V (83 ohms)
balanced line 'l'AlIi OUT. o50 rnV at Ik olrnrs;
TAPli/ItOOSTIzR. S V at IOk ohms; WMT-I
output 500/000 ohms: BRIDGING (IX mV at
l()()l\' ohms); Rever'b output. (150 mV at 1k ohms.

COMPRESSION: 5 milliseconds altaek time. 1
seconds decay time. max. ('ompression l5 dB.

TONE CONTROL ACTION: BASS 50 III. + 0 dB to
-|2 tlBtTRLBLE ll klll. + 9 dB to ~11 till.

CONTROLS AND INDICATORS: Ml( l. Ml(' 1
Volume; AUX I. AUX 2 Volume; MASTER
Volume. BASS. TREBLE; ('ompression Switch:
Power Switch; Indicator Lamp,

SEMICONDUCTORS: I4 silicon transistors. 2 Zener
diodes. (a silicon diodes.

POWER REQUIREMENTS: I20 V. (at) 7.. I.() A,
| 70W.

DIMENSIONS: Io~.I/8W x I3-3/4D x 4-l/4"II.

WEIGHT: 23 lb.

A tape out jack provides for making tape recordings
independent of the amplifier master volume and tone
controls.

The amplifier operates from a |20 volt, 60 Hz line. A
three-prong line cord provides automatic grounding when
connected to a three-wire outlet. The output transistors are
protected by a thermal breaker, and the circuitry is further
protected by a circuit breaker.

IEAR sIEGLER me @I
PRINTED IN U.S.A. " ' VG)
3~73 scam DIVISION 54-5592-01

P n 30): an"
PARAMHS .v J "51