TECHNICAL SPECIFICATIONS
Rated Output: Program: 35 Watts
Intercom:
4 watts
Frequency
Program:
100
to 20,000 Hz 2
dB
Response: Intercom:
Shaped for best voice
articulation.
Distortion:
Less than 3% @
35
Watts:
100
to
10.000 Hz
Noise Level:
Microphone:
-50
dB
Radio/Phone:
-60
dB
Sensitivity
:
Microphone: 300
µV
Radio/Phone:
100
mV
Tape In:
100
mV
Intercom:
4
mV
Inputs:
2 Microphones (Lo-Z, balanced or
unbalanced)
Radio
Phono
Tape In (Front Panel)
outputs:
Program: 25 Volts balanced
Intercom: 25 Volts balanced
Tape Out/Booster: 2 Volts
Switches:
Pushbutton Type: Microphone. Pro-
gram, Intercom, Emergency, and
Talk/Listen.
Program Send/Preset
Program Normal/All Call
Power On/Off
Controls:
Mic Volume (fader-MIC
l/MIC
2)
Program Volume
(
Radio/Phono-Tape
fader)
Intercom Level
Monitor
Tone Hi Cut/Flat
Indicators:
Illuminated output meter
Dimensions
Width Height
Depth
(Inches
&
Cm):
MCT-I Control Panel
l9(48.3)
5¼(
13.3)
I
l½(29.2)
Series
15-l
(I5T-1)
Consolettes
21¼(54)
16(40.6) 16(40.6)
Series
15-2
Consolette
40½(
102.9)
I6(40.6)
I6(40.6)
Series
15-3
Console
22(55.9)
46(116.8)
3 l(78.7)
Finish:
Back and Sides-Satin Mocha
Control Panels-Desert Beige
Optional
Equipment:
Model SBL Switch Banks, for use
with visual and audible annunication.
Model SST-
1
A Single-Circuit Mod-
ule, for classroom change signals.
Room switches, for use with intercom:
Model CA-IO Call switch. Model
CA- I I Call/Privacy switch, Model
CA-13 Voice Call-In switch.
ADJUSTMENTS
(For Qualified Service Personnel Only)
CAUTION
The follo wing adjustments require removal
of the top cover. Use standard precautions
to prevent electric shock or accidental short
circuits within the unit.
OUTPUT METER ADJUSTMENT
This is a factory adjustment that normally is not re-
quired in the field. If a meter replacement is required, a
calibration adjustment may be needed. Proceed as
follows:
Feed a 1 kHz input signal in radio or phono jack.
Connect an A.C. V.T.V.M. across half the program
line (Pin 6 and 1 on output socket). With program
level control adjusted to read 12.5 volts on the
V.T.V.M., turn the meter control R102 (potenti-
ometer nearest to front panel) until the needle reaches
the black mark on meter scale.
EMERGENCY LEVEL ADJUSTMENT
This is a factory adjustment that sets the emergency
output level the same as the intercom output level. If it
is necessary to adjust this level, turn the level control
RlOl
(potentiometer furthest from front panel) clock-
wise to increase output.
REPLACING COMPONENTS
All semiconductor components on the printed circuit
board are soldered in place to ensure maximum reliabil-
ity. When soldering or unsoldering transistors or
diodes, use a heat sink (such as a small alligator clip)
between the component and the source of heat. When
replacing driver and output transistors (QlO-Qll), be
certain to install the collector insulator, after lightly
coating both sides with a thermal conducting compound
(such as Dow Corning No. 340, or equivalent).
REPLACEMENT PARTS
Most components used in
Bogen
equipment are
standard parts available through reputable parts deal-
ers. This section lists those parts which should be re-
placed with genuine
Bogen
parts, available through
Bogen
distributors, service agency or directly from the
factory.
When ordering a part, give the part number and de-
scription as listed below. Specify the model of the unit.
For parts in the MCT-1 control chassis, specify the
series designation, which is a letter followed by numbers
and is stamped or screened on the rear of the chassis.
-8-
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