SoundTraxx Tsunami User manual

Tsunami™ Digital Sound Decoder
Installation Guide
for the New User
Software Release 1.00
Rev. A 11/18/05

Notice
The information in this document is subject to change without notice.
SoundTraxx (Throttle Up!) shall not be liable for technical or editorial errors or omissions contained herein; nor for incidental or consequential dam-
ages resulting from the furnishing, performance or use of this material.
This document contains information protected by copyright. No part of this document may be photocopied or reproduced in any form without the
prior written consent of Throttle Up! Corp.
Product names mentioned herein may be trademarks and/or registered trademarks of their respective companies.
SoundTraxx, Tsunami, SoundTraxx DCC, Digital Sound Decoder, Dynamic Digital Exhaust, Auto-Exhaust and Hyperlight are
trademarks of Throttle Up! Corp.

Table of Contents
All Aboard! ...........................................................................1
Overview ................................................................................................1
Features ................................................................................................2
Installation ...........................................................................4
Pre-Installation Checklist .......................................................................4
Step 1: Select Your Locomotive ............................................................6
Step 2: Test the Stall Current .................................................................7
Step 3: Plan the Installation ...................................................................8
Step 4: Isolate the Motor .....................................................................14
Step 5: Modify the Tender or Body Shell .............................................16
Step 6: Secure the Speaker In Place ..................................................18
Step 7: Install the Exhaust Cam (Steam) ............................................19
Step 8: Install and Wire the Decoder ...................................................22
Step 9: Test the Installation .................................................................29
Support ...............................................................................30
Service and Warranty Policy ...............................................................30

Tsunami Installation Guide Page 1
All Aboard!
Overview
Congratulations on the purchase of your SoundTraxx™ Tsunami™ Digital
Sound Decoder™. Properly installed, your Digital Sound Decoder (DSD)
will provide all the pleasures of high quality, digital onboard sound and
the benefits of today’s DCC (Digital Command Control) technology. With
the proper tools, basic modeling skills and common sense, equipping a
locomotive with sound is not difficult. It may, however, be a new experience
for you, and you will find that successive installations will go more quickly
than the first. Please note that while each decoder is tested thoroughly
before it is shipped, we cannot control the correctness or quality of the
installation. It is imperative that you follow the directions, and never remove
the protective heat shrink from the decoder; there are no adjustments or user
serviceable parts and this will void your warranty.
If this is your first decoder installation, this Installation Guide will give you
step-by-step instructions for a successful first installation. The User’s Guide
will walk you through the various aspects of programming your Tsunami
decoder, as well as some tips on troubleshooting. Once you’ve had some
experience using and programming your decoder, the Tsunami Technical
Reference will provide a list of all the CVs available for use with Tsunami
decoders. This reference also explains their exact function and make-up for
those who wish to have a complete reference for advanced programming
techniques.
Technical bulletins covering various topics are also published from time to
time, and these, along with the Technical Reference may be downloaded
free of charge from our website at www.soundtraxx.com.

Tsunami Installation Guide Page 2
Tsunami Installation Guide Page 2
Tsunami Features
Tsunami Digital Sound Decoders have a great number of new features
designed to enhance your operating experience. Many features operate
similarly to previous SoundTraxx decoders, but some features will require a
little explanation.
Some of the enhancements include:
Decoder Features
• Supports extended address mode for assigning any locomotive number
up to 9,999.
• Supports advanced consist addressing.
• Supports ‘Operation Mode Programming’, allowing CVs to be changed
on the mainline without using a programming track.
Sound Features
There are many new sound effects (now over 20 sound effects!) and the
ability to adjust the sounds to suit your ear (and model) has been greatly
expanded and improved. You can now adjust the volume of each sound
effect individually with Tsunami’s built-in mixer!
The addition of a short whistle/horn effect will allow you to more easily
incorporate signaling practices into your operations. There is also the option
of replacing the short whistle function with an alternate whistle or horn for the
engine which carried two whistles or occasionally, a horn and a whistle.
For those with limited function keys, you may wish to enable the automatic
signal feature, which will activate Stop, Forward, Reverse and Grade
Crossing whistle signals automatically in response to train motion.
More Sound Features
• Adjustable Volume Controls • 1-Watt Audio Amplifier
• Seven-Band Equalizer • Adjustable Reverb
• Auto-Exhaust™ allows chuff to be synchronized to the locomotive speed
without a synchronizing exhaust cam (steam); cam is optional.
Steam Sound Effects
• Steam Exhaust Chuff • Bell
• Whistle • Short Whistle
• Airpump • Dynamo
• Water Stop • Brake Squeal
• Brake Release • Side Rod Clank
• Snifter Valve • Injectors
• Johnson Bar/Power Reverser • Firebox Blower
• Steam Release • Boiler Pop Valve
• Fireman Fred’s tool box (5 effects) • Coupler Clank
• Dynamic Digital Exhaust™ modifies
exhaust volume, cutoff and timbre as locomotive load changes.
All Aboard!

Tsunami Installation Guide Page 3
Tsunami Installation Guide Page 3
Diesel Sound Effects
• Engine Exhaust (8 notches) • Engine Startup
• Engine Shutdown • Bell
• Airhorn • Short Airhorn
• Compressor Pop-off • Dynamic Brakes
• Brake Squeal • Brake Release
• Radiator Fans • Coupler Clank
• Turbo Whine (some models) • Fireman Ed’s tool box
Throttle Features
Tsunami Digital Sound Decoders have greatly improved throttle features
built into our Hyperdrive system. With the addition of these features, you
will be able to better eliminate motor noise, better control your locomotive
speed under varying conditions and adjust for differences between various
manufacturers’ models.
• Supports 14, 28 and 128 speed step modes.
• Programmable acceleration, deceleration
and starting voltage for prototypical starting and stopping.
• Use of standard and alternate speed tables.
• Load Compensation
• Silent High Frequency Motor Drive
Lighting Features
All of our Hyperlight effects are available in our Tsunami decoders. One new
addition, the Dyno-Light, provides the missing element in the operation of the
Dynamo, or steam generator. This mimics the effect of the gradual increase
in brightness as the generator spools up and supplies power to the headlight.
The new LED Compensation will adjust the lighting output level to account
for the visual differences in your lighting effects when using an LED rather
than an incandescent bulb.
• Four function outputs for headlight and backup light or other effects
• Supports ”Rule 17” operation or automatic direction control
• 100mA Current Sink Capacity
• Each output may be programmed with our Hyperlight™ Lighting effects:
Lighting Effects
• Simple On/Off Lamp • Dimmable light
• Oscillating headlight • Mars Light
• Pyle-Gyralite • Prime Stratolite
• Western-Cullen Rotary Beacon • Single Strobe
• Type I and II Ditch Lights • Double Strobe
• FRED (Flashing Rear End Device) • Engine Exhaust Flicker
• Firebox Flicker • Dyno-Light
• Smart Firebox Flicker – synchronizes with
sound of the firebox door opening and closing
All Aboard!

Tsunami Installation Guide Page 4
Tsunami Installation Guide Page 4
Pre-installation Check List
It will be a great temptation to begin connecting wires immediately. Before
you install your Tsunami Digital Sound Decoder, there are some simple
precautions you should take.
First, read the instruction sheet that came with your decoder carefully! It will
always be the source of the most recent information. Then finish reading this
Installation Guide.
• The DSD should be handled carefully in a static-free environment. To
discharge static electricity, touch a water pipe or grounded, metal surface
before handling the decoder.
• Never remove the decoder’s protective shrink tubing. First, you will void
your warranty and second, you will compromise the decoder’s built in
thermal management system.
• Never make connections to the decoder while it is powered. Doing so
makes for an accident waiting to happen.
• Make sure all electrical connections are insulated. Avoid using electrical
tape, as it tends to unravel over time. We recommend using heat
shrinkable tubing instead.
• Never allow the decoder leads to come in contact with any DCC track
wiring except those specifically designed for that purpose.
• Never allow speaker outputs to become shorted together.
• Never allow motor outputs to become shorted together.
• Do not exceed the output ratings for which the decoder is designed.
• Take your time and have fun!
In the event you damage your decoder during installation, our return policy
is stated in the rear of this manual as well as posted on our website with an
effective date reflecting any changes.
Tools and Materials You Will Need
In addition to the common hand tools found on most modeler’s workbenches,
you should have at your disposal:
• Low wattage (under 25 watts) solder iron
• Rosin Core Solder
• Hobby Knife
• High Speed Motor Tool (such as a Dremel)
• Miniature Screwdriver Set
• Diagonal Cutters
• Multi-meter
• Double Sided Tape
• Silicone RTV
• Heat gun
• Assorted sizes of heat-shrink tubing (SoundTraxx P.N. 810037)
• Insulative Tubing (SoundTraxx P.N. 810036)
Installation

Tsunami Installation Guide Page 5
Tsunami Installation Guide Page 5
We also recommend the following items to aid your installation:
Micro connectors can be used to facilitate easy separation of items like
speakers from the locomotive. SoundTraxx offers an economical 2-pin
connector (P.N. 810012) and a 10 pack of mini-micro connector pins and
sockets (P.N. 810058).
SoundTraxx P.N. 810123 is an NMRA-compatible 8-pin socket useful for
converting harnessed decoders to a more ‘plug and play’ format.
SoundTraxx offers two sizes of 1.5 Volt micro-bulbs for use with the included
lighting effects. P.N. 810022 is a 1.3mm diameter bulb and P.N. 810024 is a
2.2mm diameter bulb. Bulbs are also available in economical six-packs.
SoundTraxx offers a variety of high quality, miniature speakers suitable for
use with Digital Sound Decoders. Wherever possible, choose the largest
speaker that can be fit into the locomotive.
Installation
P.N. 810022
1.3mm 1.5 Volt Micro-bulbs
P.N. 810012
2-pin Micro-connector
P.N. 810123
Pkg. of 4 Eight-pin
NMRA Connectors
P.N. 810058
Pkg. of 10 Single-pin
Micro-Mini Connector

Tsunami Installation Guide Page 6
Tsunami Installation Guide Page 6
Step 1. Select Your Locomotive
If this is the first time you have installed sound in a locomotive, then we
suggest you choose your locomotive carefully. A few simple precautions will
ensure that your first effort produces a great sounding locomotive instead of
an intimidating ball of wires:
• Don’t pick a locomotive whose stall current exceeds the rating of the
decoder.
• Do pick a smooth running locomotive that runs well on straight DC
power. A smooth running mechanism is vital for good throttle control
and enhances the realism of the sound. Dirty, worn out or binding
mechanisms not only overload the decoder, but also will have trouble
starting smoothly and will destroy the illusion created by the Auto-
Exhaust feature if they barely lurch along at half throttle.
• Do start with an engine that is ‘sound-ready’ if possible, such as an
engine with predrilled speaker holes. The simpler you can make your first
installation, the better.
• Don’t pick a noisy engine, or one which experiences some arcing or
sparking when in operation. The best sound will come from locomotives
powered with can motors. Older, open-frame motors may produce an
offensive, interference sound.
Installation

Tsunami Installation Guide Page 7
Tsunami Installation Guide Page 7
Step 2. Test the Motor Stall Current
Test the locomotive’s stall current to ensure that it is compatible with the
Tsunami model you have selected.
1. Place the locomotive on a section of track powered by a conventional
DC power pack set to the same track voltage as your command station
(typically 12-14 volts).
2. Connect a DC ammeter in series with one of the track feeders as shown
in Figure 1. If your power pack has built in meters, they may be used for
this purpose.
Figure 1 - Testing the Locomotive’s Stall Current
3. While grasping the locomotive to prevent it from taking off, turn the power
pack on.
4. Stop the motor from turning by firmly pushing it down into the track or
grabbing hold of the flywheel.
5. To ensure the most accurate measurement, be sure that the power pack
voltage remains at the voltage set in Step 1 of this test.
6. Measure the current the locomotive is drawing while the motor is stalled.
This is the stall current and must be less than the decoder’s rated
capacity.
Installation
Ammeter
DC Power Pack set to 14V
(12V for N-Scale)

Tsunami Installation Guide Page 8
Tsunami Installation Guide Page 8
Step 3. Plan the Installation
You should give some thought to where the installation of the various DSD
components will be within the locomotive before you get started. Provide
ventilation for the decoder if possible, mounting the decoder so that some
airflow can occur. Also, mount the decoder away from other heat sources,
such as the motor or lamps to reduce the chance of overheating. If you can,
mount the decoder so that the ‘flat’ side is against a metal chassis or weight.
This will further help to dissipate heat. Always, always provide a proper baffle
(enclosure) for the speaker. Lack of a speaker baffle is the leading cause
of poor sound quality or low volume. Finally, make sure to use the largest
speaker that you can fit, as a bigger speaker will provide more volume and
deeper bass.
Figure 2 shows a typical Tsunami installation in a die-cast locomotive.
Following as many of the guidelines above as possible, we’ve mounted the
flat side of the decoder against the tender shell to help dissipate some heat.
The speaker is mounted up under the coal load, and the decoder is not
mounted near the motor or lamps.
Figure 2 - Typical Steam Sound Installation
In Figure 3, the speaker is mounted on a deck plate fabricated from sheet
styrene pointing up through the coal load. The tender shell acts as a baffle
for the speaker. The plastic coal load can be perforated with small holes
made with
a pin vise
or hand
drill. The
decoder is
mounted to
the weight
on the
floor of the
tender.
Installation
Backup Ligh
t
Right Rail Pickup
usually connects
to locomotive frame
Headlight
Speaker
Left Rail Pickup
usually connects
to tender frame
Blue
White
Motor (+) Lead
Motor (-) Lead
Black
Yellow
Purple Blue
Orange
Gray
Red
Digital
Sound
Decoder
Figure 3 - A typical speaker installation using the tender as
the speaker enclosure.

Tsunami Installation Guide Page 9
Tsunami Installation Guide Page 9
When planning a diesel installation the same rules apply. In general you
want to draw heat away from the decoder by mounting the flat side against a
metal chassis or weight, or providing additional airflow if possible. This may
not always be an option, so don’t mount the decoder above the motor which
generates it’s own heat and will cause the natural tendency of the decoder to
get warm during operation to be accelerated.
Figure 4 - Typical Diesel Sound Installation
Figure 4 shows a typical Tsunami installation for a diesel locomotive. In this
instance, the speaker is mounted in the fuel tank, with the module itself under
the fan grills. If the fan grills are open, some airflow can be created by drilling
some small holes in the bottom of the frame without compromising the sound
quality since the speaker is isolated in the fuel tank (a natural baffle!). If the
chassis is metal, the flat side of the decoder can be mounted against it to
help dissipate some heat. Like the steam installation on the previous page,
the decoder is not mounted near the motor or lamps.
Figure 5 - A typical speaker installation in a
powered diesel locomotive. Note baffle and fuel tank compartment.
Installation
Backup Light
Headlight
Left Rail Pickup
Speaker in fuel tank or
under fan grills
Blue Blue
White
Motor (+) Lead
Red Gray (
Motor (-) Lead)
Orange
Black
Yellow
Purple
Red
JUMPER WIRE BETWEEN TRUCKS
Digital
Sound
Decoder

Tsunami Installation Guide Page 10
Tsunami Installation Guide Page 10
Speaker Considerations
You will want to use the largest speaker possible to get the best volume and
bass response.
The decision most critical to the success of your installation will be where to
put the speaker. Obviously, the ‘where’ of speaker installation will depend
on the size and type of the locomotive. But when considering the speaker’s
location, remember that the volume of the speaker will be greatly enhanced
when the speaker is fitted into a small airtight enclosure with the front of the
speaker open to surrounding air. The reason for this is simple: in order to
generate any appreciable sound, the speaker must develop air pressure.
Without an enclosure, an opposite pressure behind the speaker cancels
any pressure developed by the front of the speaker. The enclosure isolates
the front and back surfaces of the speaker, thereby increasing the sound
pressure and hence, the volume. It is critical therefore to make sure you seal
these baffles well; any holes or loose seams will diminish the results and in
some cases cause unwanted vibrations.
Additionally, the enclosure must be sized proportionally to the speaker such
that the volume of air enclosed is several times larger than the speaker
diameter. As a rule of thumb, for small speakers, the minimum for the length,
width and height should be equal to the speaker diameter. Unfortunately,
as space is limited in most models, this is only a general guideline, and
exceptions can and must be made in many circumstances.
HOWEVER, the use of a proper speaker enclosure cannot be over
emphasized and failure to use one is almost always the cause for poor sound
quality.
In many cases, the tender of a steam loco tender can serve as the speaker
enclosure. In this case, mount the speaker facing down through an opening
in the tender floor or up through an opening in the coal load as shown in
Figure 2. For diesel models, the fuel tank makes a good natural enclosure.
Alternatively, up under the fan grills or in the cab can be good locations.
SoundTraxx offers a variety of high quality, miniature speakers suitable for
use with the Tsunami Digital Sound Decoders (see the table on page 12) as
well as baffle kits for some of the more popular models.
Figure 6 - SoundTraxx Snap-together Baffle Kits
Installation

Tsunami Installation Guide Page 11
Tsunami Installation Guide Page 11
SoundTraxx currently offers four sizes of snap-together speaker baffle kits
for use with SoundTraxx speakers. P.N. 810107 is designed for use with
a 3/8” round speaker, P.N. 810108 fits a 1/2” round speaker, P.N. 810109
accommodates a 3/4” round speaker and our P.N. 810110 is perfect for a 1”
round speaker.
If you wish to fabricate your own, a speaker enclosure need not be fancy and
can be built from sheet styrene, bass wood, and even cardboard in a pinch!
A 35mm film canister usually produces excellent results, as does a pill bottle
or the cardboard tube center of a roll of paper towels.
Figure 7 - Other Types of Speaker Enclosures
The Figure 7 illustrates some home-made speaker baffles. With a little
creativity, you’ll be surprised at how many baffles you can create from sheet
styrene or from items just laying around the house or workbench.
Choosing the Right Speaker
While each and every SoundTraxx sound decoder is packed with awesome
digital sound, the reality is that without a good speaker, you won’t hear that
great sound. The table on the following page should help you choose the
best possible speaker to match to your particular installation.
In general, a larger speaker will provide better sound; therefore, try to choose
the largest possible speaker for your installation. Once you have determined
what physical space is available, look at the chart below to determine which
speakers will fit. Remember to consider the size of the speaker baffle as well.
If you have more than one choice available, look at the frequency response
of the speaker and choose the one with the lower number.
Using Tsunami with Multiple Speakers
In most cases, one speaker properly installed and baffled will provide more than
enough volume for the average model. In cases where size constraints may
make it desirable to use multiple smaller speakers instead of one, care should
be taken to observe the following:
Tsunami’s amplifier is designed to drive an 8 ohm load. If you choose to use
Installation
Home-made Baffle from Sheet Styrene Baffle Fabricated from Bottle Cap

Tsunami Installation Guide Page 12
Tsunami Installation Guide Page 12
multiple speakers wire them according to the directions on page 23 so as not
to exceed this load. If not wired correctly, multiple speakers can overload the
amplifier.
Note: Do not use Tsunami with speakers whose (total) impedance is less than
8 ohms. Doing so may result in erratic operation or even component failure!
Decoder Considerations
It is normal for the DSD to get warm after periods of extended operation and
its thermal overload protection will shut down the audio amplifier if it gets too
warm. Therefore, it is important to install the decoder in a location where it
can dissipate the most heat. Avoid placing the decoder near heat sources
such as the motor or lights wherever possible.
Lighting Considerations
Each Tsunami is equipped with four function outputs that are intended to
drive headlight, backup light and special effect lights. The outputs can be
independently programmed for a multitude of Hyperlight effects and may be
used in a variety of ways. Each output is rated for 100mA.
Do not exceed this rating! Be sure that the combined current of all
lights as well as the motor stall current measured in Step 2 does not
exceed the decoder’s current rating.
Installation
Part
Number
R = Round O = Oval
810083
810089
810053
810054
810055
810056
810087
810057
810059
810112
810113
810103
810078
810084
0.18
0.19
0.13
0.20
0.65
0.70
0.84
0.96
1.50
0.19
0.28
0.32
0.50
1.10
R
R
R
R
R
R
R
R
R
O
O
O
O
O
0.20
0.10
0.20
0.20
0.20
0.30
0.50
1.50
3.00
1.00
1.00
1.00
1.00
2.00
0.39
0.59
0.80
1.10
1.50
2.00
2.50
3.00
4.00
1.00x0.56
1.38x0.63
1.56x0.78
1.12x1.57
1.50x2.50
Diameter
(in.)
Depth
(in.)
Frame
Style
Max. Input
Power (Watts)
8
8
8
8
8
8
8
8
8
8
8
8
8
8
Impedance
(Ohms)
750-3.5K
540-20K
600-7K
550-6K
700-4K
500-4K
330-4.5K
280-5K
160-12K
750-3.5K
500-12K
550-12K
350-12K
230-20K
Frequency
Response
SoundTraxx Speaker Comparison Chart

Tsunami Installation Guide Page 13
Tsunami Installation Guide Page 13
The DSD lighting outputs may be used with 12-16 volt incandescent lamps,
LEDs or 1.5-volt micro-bulbs. For more on lighting outputs, see pages 25
and 26.
Other Considerations
Finally, you will need to decide whether or not to hardwire the electrical
connections or use a plug-able connector. A connector will allow you to easily
separate the components for storage, painting and service easier but also
opens the possibility of accidentally damaging the decoder by reversing
the connector during reassembly. Hardwiring the decoder will prevent this
possibility at the expense of making separation more difficult.
Figure 8 - Miniature connectors make installation easier.
After you have fully read the installation instructions that came with your
decoder, we suggest you draw yourself a schematic showing all connections
between the DSD and various sub-components. This will help you determine
which type of connector is best suited for your needs.
Installation
Single-pin
Micro-Mini Connector
Eight-pin
NMRA Connector
MC2 2-Pin
Microconnector

Tsunami Installation Guide Page 14
Tsunami Installation Guide Page 14
Step 4. Isolate the Motor
The two motor brush connections must be electrically isolated so they are
driven exclusively by the DSD motor outputs. We’re not kidding about this!
Nowadays, many locomotives are being designed and sold as ‘DCC-ready’.
Unfortunately, this means different things to different manufacturers, but it
generally means that this step has been taken care of for you. In the case of
a ‘DCC-ready’ locomotive, follow the instructions on page 27.
Failure to properly isolate the motor will damage your decoder and turn
it into an effective, but short-lived smoke generator!
Begin motor isolation by removing the body shell from the locomotive and in
the case of a steam locomotive, the tender shell as well.
Before you proceed further, it is important to carefully examine the
locomotive wiring and determine where each wire goes and what it does.
The manufacturer’s assembly drawings may be useful here or you may elect
to create your own wiring diagram. In particular, you will need to identify the
connections to the left and right power pickups as well as the (+) and (-)
motor connections. Note: for N, HO, and S scale locos, the positive motor
connection is the one connected to the right rail (engineer side) power
pickup.
Figure 9 - Conventional DC Power Pickups
Disconnect all wires leading to both motor terminals. Note that some motor
brush connections are made using a spring contact to the chassis. In such
cases, it will be necessary to remove or modify the spring contact as well.
Be aware that some locomotives may make contact between the motor and
frame only when the body is reinstalled.
Installation
Left-hand Rail Pickup
Forward
Right-hand Rail Pickup
Motor

Tsunami Installation Guide Page 15
Tsunami Installation Guide Page 15
Next, verify that each motor terminal is electrically isolated from the left and
right rail pickups using an ohmmeter or continuity tester:
1. With your meter set to the ohms scale, touch both meter probes together
and note that the meter indicates 0 ohms (short circuit). You don’t want to
see this indication again!
2. Touch one of the probes to one of the motor brush terminals.
3. Touch the other probe to the locomotive frame, then the left rail power
pickup wire, and finally to the right rail power pickup wire.
4. Move the first probe to the other motor brush terminal and repeat the
tests. If all tests indicate an open circuit, the motor is properly isolated.
Do not proceed further until this is done.
You will also need to disconnect the wires leading to any lights you wish to
use. Using an ohmmeter, check that each lamp lead is electrically isolated
from the frame as well as the left and right rail pickups.
Installation

Tsunami Installation Guide Page 16
Tsunami Installation Guide Page 16
Step 5. Modify the Tender or Body Shell
In the case of a steam locomotive, you will probably be mounting the speaker
facing down on the tender floor or facing up in the coalbunker. You may
need to cut an opening in the tender floor for the speaker. A series of small
holes can be easily drilled and will work as well as one large hole provided
the open area is at least one half the area of the speaker cone. In either
case, there should be no openings outside or larger than the speaker cone
itself. If the locomotive is plastic and you will be drilling holes in the coal load,
drill them at slight angles and they will appear nearly invisible.
Figure 10 - Examples of Some Tender Modifications
In the case of a diesel model, you may need to mill out some of the weight
Installation
Styrene
in sub-deck
Cut hole diameter
to slightly less than
speaker diameter.
Perforate coal load
with #55 drill.
Cross section of plastic tender
with molded coal load.
Remove inside walls
and slope sheet if needed.
Opening in deck
should be slightly smaller
than speaker diameter
Optional wooden
retaining boards to
build up height.

Tsunami Installation Guide Page 17
Tsunami Installation Guide Page 17
in the fuel tank or replace the model’s fan grills with some open-grill detail
parts. Figure 11 shows some of the modifications you might make in a diesel
installation. By milling out some of the weight in the fuel tank an enclosure
is made for the speaker. You will need to fashion a mounting plate for the
speaker and seal it well.
If you place the speaker under open fan grills, you may still wish to baffle the
speaker rather than use the body as the baffle, as it may be difficult to seal
the chassis well enough to achieve the results you want.
Figure 11 - Diesel Modifications
Installation
Mi
ll out the metal fuel tank and create styrene
deck plate for speaker to mount.
Fabricate styrene baffle
Oval Speaker
Replace factory fan grills with
open grills (available as aftermarket
detail parts)
Speaker
Speaker
Gasket
Deck
Plate