DALLEE ELECTRONICS Speakers Manual
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IN LOCOMOTIVE STEAM SOUND
for various track power by
CAUTION:
This device can be damaged by static discharge. Please exercise care during installation to avoid
this possibility. Discharge yourself to an electrical ground (outlet cover screw) before removing this device from
its anti-static bag. Please read instruction sheet completely before attempting to install and operate this
product. Save the anti-static bag for possible reuse of storing or shipping the sound unit!
SOUND INFORMATION:
AIR PUMPS are needed to maintain air pressure in the train and locomotive braking systems.
These pumps must run periodically as pressure drops, due to brake applications or through
normal leakage. To simulate this action, AIR PUMP sounds are generated at random intervals
when the sound system is on and there is no power to the track / motor. AIR PUMP sounds will
also be heard when power is first applied to the sound system. This will give you an indication
that the system is in fact functioning.
BLOWERS are used on a steam locomotive to maintain fire box draft when the locomotive is not
in motion. BLOWER sound will be generated whenever the locomotive has stopped moving and
there is no power to the track / motor.
SAFETY VALVE will vent if steam pressure in the locomotive boiler becomes excessive. The
sound system will produce a SAFETY VALVE release at random intervals whenever the blowers
are on and steam is not otherwise being used.
CYLINDER BLOW DOWN is required to remove condensate that accumulates in the cylinders
when a locomotive has been at rest. This condensate must be exhausted from the cylinders prior
to the pistons being powered by steam or there can be damage to the cylinders. CYLINDER
BLOW DOWN sounds will be generated by the sound system when requested. With the
LocoMatic™ Controller you depress and release the ALT & F3 button to turn on the CYLINDER
BLOW DOWN and then again depress and release the button to turn the CYLINDER BLOW
DOWN off. Toggle switch or remote function control does not require the PUSH ON - PUSH OFF
sequence. The CYLINDER BLOW DOWN will automatically turn off when the locomotive starts
running (1.5 - 2 volts is required on the motor input terminals, J3 pins 2 and 3, to be sensed).
WHISTLE sound is controlled by the WHISTLE button on the LocoMatic™ Controller, by a
momentary push button or by remote function, dependent upon the type of installation. The
WHISTLE will sound as long you are holding the control on. This will allow you to actually play
the sound as on a real locomotive. DCC and similar systems will have a sound delay equivalent
to system response time.
BELL sound is controlled by the BELL button on the LocoMatic™ Controller, by a toggle switch or
by remote function, dependent upon the type of installation. When BELL sound is requested the
sound system will ring the BELL continuously. After a ring or two, the BELL can be turned off and
will stop at the end of a ring. With the LocoMatic™ Controller you depress and release the BELL
button to turn on the BELL and then again depress and release the button to turn the BELL off.
Toggle switch or remote function control does not require the PUSH ON - PUSH OFF sequence.
EXHAUST CHUFF is the most notable sound of a steam locomotive in motion. The sound is the
result of the used steam from the cylinders being vented through the stack. Each cylinder will
exhaust twice during each drive wheel revolution and since most steam locomotives have two
cylinders, the exhaust should chuff four times for each drive wheel revolution. EXHAUST CHUFF
sounds should vary from a very slow chuff rate to an almost continuous roar at high speed.
EXHAUST CHUFF should also vary as to the load on the locomotive with a heavy train making a
louder exhaust. This sound system will vary the EXHAUST CHUFF sound either by voltage
supplied to the track / motor or, as an option using switch contacts or our OPTICAL INPUT (Item
#583), with actual movement of the drive wheels or other axles. When the sound system is
initially powered on, voltage variable automatic exhaust chuff is in operation. If you have installed
an optional manually synchronized exhaust chuff, the sound system will switch to this
synchronized mode on the first chuff input and will continue synchronized as long as sound
system power remains on. Additionally, the EXHAUST CHUFF volume will increase above normal
during accelleration and will be lower when decellerating.
SPEAKER MOUNTING: The speaker generally should be mounted so that the sound can
actually "get out" of the locomotive. A hole in the floor of the tender is acceptable but the front of
the coal bunker or even through a simulated coal load may be a better choice as the sound can
exit forward or upward rather than down toward the track. In some cases, particularly in the larger
gauges, mounting a speaker inside the front of the boiler with a open stack can enhance the
sound. Enclosing the speaker in a chamber will also enhance sound reproduction. A very simple
enclosure can be made with a tube. It is usually best to seal the end of the tube, so there are no
air passages to the rear of the speaker, thus creating a sound chamber. By carefully sealing all
openings it may be possible to use the entire tender body shell as a sound chamber. A simple
wall behind the speaker may be all that is possible or perhaps all that is needed.
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OVERVIEW: This device is an electronic, self contained, sound system for installation in model
steam locomotives that are designed to operate with conventional DC track power, digital (DCC),
other types of command control systems including radio with either track or battery power, or as a
stationary sound system. Because of its dimensions (2.5" x 0.9" x approx. 0.5" high) the sound
system may be limited to larger gauge models and may also require the use of a trailing car. An
alternative installation under the layout is also possible including the use of our TRAK-DT devices
to switch the sound through multiple speakers so as to follow the movement of the train. A
drawing for this application is in our Model Railroaders Wiring Guide.
An on/off switch (not included) must be used to turn the sound unit on and off in some
applications. If there is sufficient input power, the audio amplifier can produce 1.1 watts of audio
power which is in excess of what most small speakers can handle. The speaker impedance must
be 8 ohms or higher. Sound volume is adjustable. Refer to our catalog for available speakers.
Sounds produced include user controlled steam whistle and bell, random air pumps, periodic
safety valve pressure release, cylinder blow down and steam exhaust chuff sound automatically
adjusted to speed and load conditions. Exhaust chuff can also be synchronized to actual piston
movement or drive wheel or axle rotation.
This sound system, when used with conventional DC track power, requires the use of our
LocoMatic™ Controller (Item 755) to operate the whistle, bell, cylinder blow down, and main
sounds on/off. DCC and other command control operators can use remote functions on their
systems to activate these functions. For stationary installations these sounds can be accessed by
switches. Radio control with fixed track power or on board batteries would be similar to DCC
installations and large gauge (where you ride the locomotive) would be similar to a stationary
installation.
INSTALLATION INSTRUCTIONS: The sound system consists of a printed circuit board, a
speaker, five 2-pin connectors with wires and two 3-pin connectors with wires. A CHOKE (item
702 or 703 depending on motor power requirements), not included, is required for DC track
power installations.
Refer to the drawing on page 2 to familiarize yourself with the connectors and controls on the
sound board. Then refer to the specific instruction sheets for the type of installation you intend to
make. Before proceeding with the installation read the balance of the instructions carefully so you
will be completely familiar with what is required and what sounds you should hear.
The circuit board should be mounted, usually in the locomotive tender, so that the volume and
other controls are accessible either through the frame or via a hatch or a hole in the tender body
shell. Be certain that the components on the circuit board do not come in contact with any metal
objects as such contact can destroy the sound system. The speaker should be mounted as per
available space bearing in mind that sound reproduction is enhanced when a speaker is properly
enclosed and baffled.
If a DC locomotive is not moving, there is no track power, therefore to have sound it is necessary
to have a separate power supply for the sound system. For in locomotive use, this separate
supply is a battery. We suggest the use of one 9 volt, 6 AA, or 6 AAA batteries in series (7.2 - 25
volts) to maximize volume potential and battery life. Rechargeable batteries can be used. When
connecting the battery (DC) power leads be absolutely certain that wires connect to the proper
DC input leads.
If any connections are not done properly, especially the power connections, you will damage the
sound system. This type of damage is not covered under any warranty. The sound system is
thoroughly tested and inspected before packing to insure proper function. There is a minimum
charge of $35.00 plus s/h for repair.
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