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speaker
Gray
Optional Diesel
motor sound
switch
ON / OFF
(shown sound "ON")
Battery Holders
#579 - single 9 volt (shown)
#652 - holds 6 AA
#654 - holds 2 AA
#578 - 9 volt battery snap
connector
This diagram allows for the use of rechargeable batteries. When track voltage
exceeds battery voltage, the sound system will operate from track voltage and
the battery will start to charge (when in the forward direction). If you need to
charge the battery fully without the sound system on, place the locomotive on
the track (with the motor not powered if present) and leave full track voltage on
for 14 hours. The batteries will charge whenever the locomotive track power is
set for the forward condition regardless of the sound system being on or off.
They will not charge when the polarity on the track is set in reverse. When
running in reverse, the sound system will only operate from the battery. A bridge
rectifier could be used instead of a single diode alleviating this potential problem.
DC track power installation #2 with DALLEE controller #755.
With rechargeable or standard battery.
When track voltage exceeds battery voltage, the sound system
will operate from track voltage instead of battery voltage.
Red
Black
White
+
Red
–
Gray
#524 SPDT switch.
Switch shown in the OFF
position. Drawn as a spst.
Battery power - must not exceed 24 volts DC.
Use one 9 volt battery or a string of 6 AA or
AAA batteries (24 volt DC maximum input). Life
depends
on
volume
setting
and
impedance. Typical operation of most sound
systems for one good 9 volt batteries is about 8
hours, AA or larger is well beyond 50 hours!
ON / OFF
switch
speaker
Resistor needs to be calculated for battery type (you must know the charge
– +
For 12 - 14 volt maximum track voltage:
1 - Item #647 (8.4v / 150mahr) rechargeable battery use 330 ohms (1/4 watt).
9V or 6-AA,
or 6-AAA
batteries
For 18 volt maximum track voltage:
1 - Item #647 (8.4v / 150mahr) rechargeable battery use 620 ohms (1/4 watt).
4
CHOKE *
DC
lighting
motor
circuits
*Larger motors require a larger capacity choke.
Chokes:
1N4002 or
equivalent diode
(item #374)
If using a standard battery instead of rechargeable, do not
connect/use a resistor!
currents of the batteries used) and maximum track voltage used.
R = (Vtrk max - 0.6 - Vbatt nominal charge voltage) / battery charge current
6 - Item #648 (1.2v / 700mahr) rechargeable batteries in series, use 91 ohms
6 - Item #648 (1.2v / 700mahr) rechargeable batteries in series, use 150 ohms
wires with a " " ARE a
connection!
wires crossing over
(without a " ")
DO NOT CONNECT!
Right Rail
pickup
either rail may be used. Right / Left
only used for reference.
Left Rail
pickup
Item 702 - 1.5 ampere loads
Item 703 - 5.0 ampere loads
(1/2 watt).
(1 watt).
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