DALLEE ELECTRONICS Speakers Manual

IN LOCOMOTIVE STEAM CHUFF 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!
OVERVIEW:
This device is an electronic, self contained, sound system for installation in model steam
locomotives that are designed to operate with conventional track power, digital (DCC), or other
types of command control systems including radio with either track or battery power. 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 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 one watt 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. This unit is designed with the intent of creating
exhaust chuff's required for compound engines or continuous exhaust chuff with other
monophonic sound systems. Since it's intent is for the locomotive to go beyond simple exhaust
chuff operation, it will only work with a synchronized input. Our optical synchronizer, #585, is ideal
for synchronized operation and is included with this unit. Since this unit is mainly used in
conjunction with other systems, a speaker is not included. Sounds produced include user
controlled cylinder blow down, ball cocks open / closed when first pulling out, and steam exhaust
chuff 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 cylinder blow down , ball cock's open (normally
closed), and main sounds on/off. In addition to the controller, an appropriate choke is required
(see item 702 or 703). If installing dual systems, only one choke is needed. The LocoMatic™
Controller and choke's are not included since they are for specific installations. DCC and other
command control operators can use remote functions on their systems to activate these
functions.
INSTALLATION INSTRUCTIONS:
The sound system consists of a printed circuit board, five 2-pin connectors and two 3-pin
connectors with wires.
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. A 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
Version 3.8
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.
SOUND INFORMATION:
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. In either case of operation, 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). If the input, J5 pin1, is constantly pulled low to J2 pin2 or via a function
control with a remote receiver, the sound system will turn off the CYLINDER BLOW DOWN when
needed and automatically turn it back on after the locomotive has stopped for a short time.
BALL COCKS are controlled with the CLYLINDER BLOW DOWN. When they are open
condensate is pushed out of the cylinder heads by steam pressure. When they are left open, a
different exhaust chuff is heard. This is that of semi-compressed steam. Steam locomotives must
evacuate all condensate before allowing the cylinder head to completely close and fully compress
steam or the cylinder heads will explode. By leaving the CYLINDER BLOW DOWN set ON when
the locomotive starts pulling out you will hear the air blowing out of the Ball Cocks in synch with
each exhaust chuff. After a few revolutions the ball cocks will automatically close or you can
manually close them with the ALT & SF3 or function as connected.
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 with actual movement
of the drive wheels or other axles via the optical pickup. Additionally, the EXHAUST CHUFF
volume will increase above normal during accelleration and will be lower when decellerating. The
pitch of the EXHAUST CHUFF can be hard wired as explained on page 2 for various pitches
desired. The selection is from thunderous large cylinder locomotives to that of small cylinders
found on switcher type locomotives.
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
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