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Märklin BR 78 Betriebsanleitung Seite 29

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Operation
2.7.4 Operating the locomotive
on direct current
Märklin does not offer DC power
packs for 1 Gauge models. Suitable
DC power packs are those with a
maximum current of ±18 volts.
Direction reversing is done by rever-
sing polarity. The manufacturer's
instructions for a particular make of
power pack will give directions on
how to use it to operate a locomotive.
Tip:
H0 DC power packs supply a maxi-
mum voltage of ±12 volts. This loco-
motive reaches its full potential at
±16 volts. H0 DC power packs can
therefore be used only with limitations.
In operation with direct current the
headlights change direction with the
direction of travel and are on all of
the time. The intensity of the head-
lights depends on the speed of the
locomotive.
The smoke generator in the locomo-
tive is on continuously when the
locomotive is operated with conven-
tional DC power. The other functions
are turned off. The smoke generator
must not be operated without smoke
fluid in it. For that reason you should
remove the smoke generator if you
want to run the model for long peri-
ods of time without smoke fluid.
The lighting in the cars is off conti-
nuously when the train is operated
with DC power.
2.8 The Built-In Sound
Effects Circuit
The sound effects circuit is plugged
in on the backside of the digital
decoder. You can make the following
adjustments and settings on it:
Adjusting the volume
2
Turn the potentiometer to the left –
sound reproduction becomes softer
Turn the potentiometer to the –
sound reproduction becomes louder
This Potentiometer has a stop at the
left and right end positions. You
should therefore never try to turn the
Potentiometer with force past the
end positions.
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