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To strap off the Horn and Bell in a diesel unit, connect the
SYNC white wire to the black wire. This will allow only the
prime mover sounds to operate. Cut the white wire off or
remove from the connector.
adding manual control to the IN LOCOMOTIVE DC SOUND system as a
stationary unit to adjust diesel notches or steam chuff rate.
Connect input power, speaker, and all other connections as shown in stationary or other types
of installations except no input connections should be applied to the DC motor/track input
header (J3) pins 2, or 3. Instead, connections should be done as shown below. All other
input power, speaker, switch connections should be done as before.
Basic setup for both types of operation: Set NOTCH CONTROL (speed set) full CCW. The
potentiometer, transistor, and a knob can be obtained directly from us as item#602 but they
may not appear on the price schedule - call or write for prices.
no connection
Black
White
+
Red
–
Gray
Don't forget to connect either J2 or
J1 to the appropriate power supply.
using dual systems with LocoMatic™ Controller
C
50K
B
CW
E
2N4401 (NPN) or equiv.
External RPM control
potentiometer with knob &
transistor (item #602)
E B C
Refer to page 9 for using two sound units. The top sound unit would be
connected as shown on page 9 without switches S1 and S2. The lower
sound unit, producing the prime mover sounds, would be connected as
shown to the left with nothing connected to J4 or J5.
Track power inputs, as shown on page 3 and 4, will be the same except they
will go to both sound systems J3 connectors.
Battery connections will go to both units DC power input connector, J2.
If you do not care to use an amplifier, you must use two seperate speakers. In
that case, each sound system will have their own speaker. The speaker
connected to the lower sound unit would then produce the prime mover
sounds with air and brake release sounds, and the other speaker,
connected to the upper sound unit, will produce the Horn and Bell sounds.
For extra 2 and 3 pin ultra-miniature connectors, see item's 757 and 758.
They are listed under Accessory Items / Connectors.
adding remote volume control when using an Auxillary Amplifier
With single sound systems, connect the gray wire from the speaker output to input "I". Connect
the rest as shown.
If using two sound system as shown on page 9, connect the junction of the two sound systems
to the capacitor as shown on page 9, then merely add the potentiometer as shown. This will only
work properly if the amplifier has an industry standard auxillary input.
I
audio input from
+
sound system
1
1 2 3
Remote
volume
control
3
viewed from front
External Volume control
with knob and capacitor
(item #601)
using an Auxillary Amplifier with matching transformer input
speaker output
11
auxillary AUDIO AMPLIFIER,
1 mfd capacitor
Item #671 or #672
Observe polarity!
2
Gray
Amplifier DC input power
Red -> +DC
Black -> ground
This needs to be the same
as the sound system power.
matching transformer
Amplifier
8 - 16
ohms
Input
amplifier input impedance
1
2
3
matching transformers
can be found in many
audio shops. They are
used for power amplifiers
found in car systems.
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