dallee-electronics diesel sound version 3 Manuel D’Utilisation

OVERVIEW: This device is an electronic, self contained, sound system for installation in model
diesel locomotives that are designed to operate with conventional DC track power, digital (DCC) or
other types of command control systems including radio with either track or battery power, also as
a stationary sound unit. Because of its dimensions (2.7" x 0.9" x approx. 0.5" high) the sound
system may be limited to installations in some powered units making the need for use of a
"dummy" unit or 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 power the sound unit on and off in some

applications. The audio amplifier can produce one watt of 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. If space permits, the optional oval speakers
(Items 662, 664, 665), which are higher wattage speakers, are the best choice.

Sounds produced include user controlled horn, bell force notch 8 and main sounds on/off (leaves
the main sounds off while allowing for horn and bell operation). Non-user controllable sounds
include periodic air system pressure release, brake release and diesel prime mover sound
automatically adjusted to speed and load conditions.

This sound system, when used with conventional DC track power, requires the use of our

LocoMatic™ Controller (Item 755) to operate the horn, bell, force notch 8, and main sounds on/off.
DCC and other command control operators can use remote functions on their systems to activate

the same functions. For stationary installations, these functions 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 70
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 so that at minimum, the volume control is accessible either
through the frame or via a hatch or a hole in the locomotive 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 or 6 AA or 6 AAA batteries in series 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.

PRIME MOVER (DIESEL): sounds range from idle to full RPM with eight notches. With no power

to the track / motor the sound system will produce engine idle sounds. As a throttle is advanced to

put the locomotive in motion, a brake release will sound (see below) and the diesel will initially
accelerate to notch #4, and then seek the correct notch setting for locomotive speed. There will be
a distinct volume increase during acceleration. With our LocoMatic™ Controller (#755), activating

the ALT and F3 buttons simultaneously (and then releasing) will direct the sound system to
accelerate to full RPM regardless of track / motor voltage. Activating both buttons again will

release the sound system to return to the correct notch setting. This feature allows the simulation
of a heavy load with very slow locomotive speed or "pumping air" in a standing train. This full RPM

feature is available to other users either by a switch or with a remote function. The prime mover,
air pops, and brake release sounds can be turned off without turning off the sound system. This
way you can still activate the Horn and Bell. With our LocoMatic™ Controller, use ALT F4 as a

press on, press off. For other receivers or stationary, a function or single pole switch will suffice.

AIR RELEASE (POPS): Air is pumped continuously in a diesel locomotive to maintain pressure in
the brake system and for other purposes. Periodically the pressure will increase and the excess
will be released through the safety valve. These AIR RELEASE sound (pops) are generated at

random intervals during idle and at all notch settings.

BRAKE RELEASE: sound is produced when the throttle is advanced from the idle position. This
brake release should always precede locomotive movement but will only occur if the diesel sound
is actually at idle. This BRAKE RELEASE has been factory preset but is user adjustable. For DC

operators, this requires approximatly 1.5 to 2 volts of input voltage to sense a running mode.

HORN: sound is controlled by the HORN button on the LocoMatic™ Controller, by a momentary
push button or by remote function, dependent upon the type of installation. The HORN 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. The sound system includes a routine

which ignores intermittent BELL requests, resulting in a delay when activating or deactivating the

BELL. When BELL sound is requested the sound system will first adjust the diesel sound to the
RPM required for simultaneous play. When deactivating, the BELL will stop at the end of a ring and

the diesel sound will return to the correct notch setting. The BELL CANNOT BE ACTIVATED if the
diesel sound is above notch #5. 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.

SPEAKER MOUNTING: The speaker generally should be mounted so that the sound can actually
"get out" of the locomotive. A hole in the floor or fuel tank is acceptable but open grills or a
doorway may be a better choice as the sound can exit upward rather than down toward the track.

In some cases, particularly with plastic body shells, just mounting the speaker against the shell will
be adequate as the vibrations of the shell 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.
The longer the tube the better the speaker will reproduce low frequency sound which is inherent in
diesel prime movers. 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 body shell as a sound chamber. A simple wall behind the speaker may
be all that is possible or perhaps all that is needed.

Speakers can be attached with double sided tape, with glue or with "hot melt". Enclosures can be
made with plastic, wood, card stock or even metal. Film cans or medicine bottles make excellent
sound chamber enclosures for small diameter speakers. Attachment with "hot melt" is
advantageous as the "hot melt" can be used as a gap filler when creating an enclosure.

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 Save the anti-static bag for possible reuse of storing or shipping the sound unit!

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