Bachmann Sound Value GE Dash 8-40CW - HO

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Information on this wiki page provides particular details about this model not found in our basic guide.

Bachmann Sound Value GE Dash 8-40CW
Bachmann Sound Value GE Dash 8-40CW.jpg
Model Information
ManufacturerBachmann
Stock Number68511-68514
ScaleHO-Scale
Power TypeDCC Dual Mode w/Sound
Release Date2023
Retail Price$459.00
Decoder Information
Decoder Type(?)OEM-21
Version(?)5
Lighting Functions(Varies); 8 Maximum
Prototype Information
BuilderGE Transportation Systems
Build DateJuly 1989 – January 1994
Motive PowerDiesel-Electric; GE 7FDL16
Cylinder CfgV16
AspirationTurbocharged
Power Output4,000 hp (3,000 kW)
More InfoGE Dash 8-40CW

Overview

Bachmann’s new DCC sound-equipped Dash 8-40CW uses original design documentation and authentic sound files recorded from the prototype. This model includes a TCS WOWSound® decoder with factory-preset configuration, and on-board Keep-Alive® device for uninterrupted operation, even over dirty track. The WOWSound® diesel-electric locomotive sound package includes sounds for horn, bell, prime mover, air compressor, dynamic brakes, cooling fan, coupler close/release, brake release and application, and many more!

Loaded with prototypical features, the GE Dash 8-40CW in HO-scale from Bachmann Trains brings all the sights and sounds of GE's iconic rumble diesel-electric locomotive to your layout.

Specific Features

Features include:

  • DCC sound-equipped for sound, speed, direction, and lighting control
  • Dual-mode NMRA-compliant decoder operates sound, motor, and lights on DCC or DC power.
  • TCS high-quality 16-bit audio
  • Authentic and prototypical sounds
  • 5 hand-picked prototypical horn options and 6 bell options
  • On-board Keep-Alive® device that keeps your engine running during power interruptions due to dirty track or loss of electrical contact
  • Directional headlights with "Rule 17" dimming operation enabled by default
  • Directional steady/flashing ditch lights
  • TCS' industry-leading "quiet drive" Back EMF motor control for superior slow-speed performance and load compensation
  • User-loadable speed table options (3-point, 28-point, and 126-point curves)
  • Three select-able Throttle Modes
  • Two configurable Momentum Modes
  • TCS' exclusive Function Pagination System
  • Die-cast frame

Specific Features

The Bachmann Sound Value GE Dash 8-40CW - HO is at its heart a WOWDiesel decoder but has had some customization to make it specific to the locomotive. The information below details where CV’s and operation differ from the standard Diesel decoder.

DC mode operation

When operating in DC mode, the locomotive will sit still and silent until a sufficient track voltage is present. Once the minimum voltage (approximately 8 volts) is met, the locomotive will ignite the prime mover and the lights will come on. An additional increase in voltage will cause the locomotive to begin to move. A directional horn blast will sound, and the bell will activate automatically. Increasing the voltage further will shut off the automatic bell. Users may trigger a grade crossing horn quill sound by quickly adjusting the track voltage up and back down quickly. The directional horn blasts, quill, and automatic DC mode bell are enabled by default. If you would like to change these settings, as well as other behavior of your locomotive on DC power, please read more in our section on DC Mode Operation and Configuration for WOWSound Version 5.

Note: This WOWSound® product does not support TCS' Audio Assist® auditory feedback program.


Button Mappings

The values outlined below in the button mapping, sound list, and CV values are the defaults assigned to this particular decoder from the factory.

For information on how to program your locomotive using the values provided in the charts below, please see our List of Diesel Version 5 Standard CV's, and/or List of Diesel Version 5 Indexed CV's.

TCS Function Pagination System

The Bachmann Sound Value GE Dash 8-40CW - HO supports TCS' new "function pagination" system. This makes it easy to access all 28 functions and all lighting effects on throttles with limited function access by adding an offset to the pressed function button (offset of +10 for function page 2; offset of +20 for function page 3). For example, to access function 15:

  • Press function 8 twice to rotate through the function pages until the decoder announces "function page [two]"
  • Press button 5 on your throttle/controller
  • The decoder will activate function 5 + 10 (page 2 offset) = 15

Note: the decoder supports accessing all decoder functions above 9 regardless of the currently selected function page by pressing the corresponding buttons on your throttle.

If you have a command station which supports all 28 function buttons and would like to disable function pagination, this may be done by re-configuring CV 177

Button Mappings
Function Button Sound Action Light Action Dual Enabled Page and Button
0 None Headlights & Number Boards (F0F/R,F1,F2) Yes Page 1 Button 0
1 Bell None No Page 1 Button 1
2 Horn - Long Blast Blink Ditch Lights Yes Page 1 Button 2
3 Horn - Short Blast Ditch Lights On/Off (F3 & F4) No Page 1 Button 3
4 Horn - Grade X Quill None No Page 1 Button 4
5 Train Brake None No Page 1 Button 5
6 Startup/Shutdown None No Page 1 Button 6
7 None Dim Headlights Yes Page 1 Button 7
8 1x Press Mute/Unmute
2x Press rotate light/sound mode or page
4x Press Audio Assist™
None Yes Page 1 Button 8
9 None None No Page 1 Button 9
10 Manual Notch Up None No Page 2 Button 0
11 Manual Notch Down None No Page 2 Button 1
12 Coupler Crash None No Page 2 Button 2
13 Coupler Release None No Page 2 Button 3
14 Brake Release None No Page 2 Button 4
15 Dynamic Brakes None No Page 2 Button 5
16 Momentum None No Page 2 Button 6
17 Crew Alert None No Page 2 Button 7
18 1x Press Mute/Unmute
2x Press rotate light/sound mode or page
4x Press Audio Assist™
None No Page 2 Button 8
19 None None No Page 2 Button 9
20 Air Spit None No Page 3 Button 0
21 Forward Quill None No Page 3 Button 1
22 Reverse Quill None No Page 3 Button 2
23 Stop Quill None No Page 3 Button 3
24 Rotate Bell/Horn None No Page 3 Button 4
25 Windshield Wipers None No Page 3 Button 5
26 Exhaust Fan None No Page 3 Button 6
27 None None No Page 3 Button 7
28 1x Press Mute/Unmute
2x Press rotate light/sound mode or page
4x Press Audio Assist™
None No Page 3 Button 8
Random Sound Mapping
Random
Sound
Generator
Sound
Played
1 Air Compressor
2 Air Spitter 1
3 Air spitter 2
4 None

Sound list

Sound Type Sound Number High Byte Low Byte Sounds Available
Air Compressor 0 0 0 GE Air Compressor Type 1
1 0 1 GE Air Compressor Type 2
Air Spitter 2 0 2 Air Spitter #1
3 0 3 Air Spitter #2
4 0 4 Air Spitter #3
Bell 5 0 5 Bell *
Brake Release 11 0 11 Brake Release
Brake Squeal 12 0 12 Brake Squeal *
Coupler Clank 42 0 42 Coupler Clank Closed
43 0 43 Coupler Clank Open
Crew Alert 44 0 44 Crew Alert Feature
Dynamic Brake 45 0 45 Dynamic Brakes
46 0 46 Dynamic Brakes Medium
47 0 47 Dynamic Brakes High
Exhaust Fan 48 0 48 Exhaust Fan
Horn Forward Quill 49 0 49 Horn Forward Quill *
Horn Long 54 0 54 Horn Long *
Horn Quill 59 0 59 Horn Quill *
Horn Short 64 0 64 Horn Short *
Manual Notch Down 69 0 69 Notch Prime Mover Down
Manual Notch Up 70 0 70 Notch Prime Mover Up
Momentum 71 0 71 Momentum Feature
Mute 73 0 73 Mute All Sounds
Prime Mover Ignition 150 0 150 Prime Mover Ignition *
Horn Reverse Quill 152 0 152 Horn Reverse Quill *
Rotate Feature 157 0 157 Rotate Feature
Horn Stop Quill 162 0 162 Horn Stop Quill *
Windshield Wipers 167 0 167 Windshield Wiper

*For Prime Mover, Bell, and Horn custom reprogramming use the sound numbers below in the corresponding CV from the table header

Prime Mover

CV 123 Value Active Prime Mover
0 (default) GE 7FDL16

Bell

CV 122 Value Active Bell
0 (default) ALCo S-4 Bell
1 EMD SW Bell
2 E-Bell
3 GE U23B Bell #1
4 GP38-3 Bell
5 GE U23B Bell #2

Horn

CV 120 Value Active Horn
0 (default) Nathan K3H
1 Nathan K5H
2 Nathan K5LA
3 Nathan M3 Tilt
4 Nathan M5

CV Addendum (Standard CV's)

The Bachmann Sound Value GE Dash 8-40CW - HO follows the motor and lighting CV's as described in in TCS' Complete Standard CV's List For WOWSound Version 5. Listed below are the CV's that have been modified for the Bachmann Sound Value GE Dash 8-40CW - HO decoder.

CV Value Description
CV 3 5 Acceleration Rate
CV 4 5 Deceleration Rate
CV 13 15 DC Mode Lights (1-8)
CV 14 3 DC Mode Lights (0F/R & 9-12)
CV 35 0 F1 Light Remapping
CV 36 0 F2 Light Remapping
CV 37 3 F3 Light Remapping
CV 38 3 F4 Light Remapping
CV 39 255 F5 Light Remapping
CV 40 255 F6 Light Remapping
CV 41 255 F7 Light Remapping
CV 42 255 F8 Light Remapping
CV 43 255 F9 Light Remapping
CV 44 255 F10 Light Remapping
CV 49 40 F0F Lighting Effect
CV 50 40 F0R Lighting Effect
CV 53 10 F3 Lighting Effect
CV 54 11 F4 Lighting Effect
CV 61 33 Configuration CV #2
CV 109 1 TCS Extended ID (High Byte)
CV 110 0 TCS Extended ID (Mid Byte)
CV 111 1 TCS Extended ID (Low Byte)
CV 115 0 Motor Delay Reset Time
CV 120 0 Horn Set Selecton
CV 122 2 Bell Selection
CV 123 0 Prime Mover Selection
CV 126 7 Rule 17 Dimming Button Remapping
CV 139 1 Random Sound Overall Timer
CV 141 5 Random Sound 1 Frequency
CV 142 20 Random Sound 2 Frequency
CV 143 255 Random Sound 3 Frequency
CV 177 176 User Options #2
CV 179 7 Automatic Sound Options #2
CV 238 133 Dual Enabled functions register 1 (F0-F7)
CV 241 8 Dual Enabled functions register 4 (F24-F28)
CV 248 1 Sound Set Version identifier
CV 249 190 Decoder Hardware Model Identifier

CV Addendum (Indexed CV's)

The Bachmann Sound Value GE Dash 8-40CW - HO follows the motor and lighting CV's as described in TCS' List of Indexed CV's for WOWSound Version 5. Listed below are the CV's that have been modified for the Bachmann Sound Value GE Dash 8-40CW - HO decoder.

CV31 CV32 CV Value Description
16 0 260 90 DC Mode Bell Cutout Voltage - Regulated
16 0 262 9 DC Quill Voltage - Regulated
16 0 264 85 DC Mode Motor Start Voltage - Regulated
16 0 266 13 DC Mode Motor Hysteresis - Regulated
16 0 268 140 DC Mode Max ADC Value - Regulated
16 0 274 90 DC Mode Bell Cutout Voltage - Unregulated
16 0 276 9 DC Quill Voltage - Unregulated
16 0 278 85 DC Mode Motor Start Voltage - Unregulated
16 0 280 15 DC Mode Motor Hysteresis - Unregulated
16 0 282 160 DC Mode Max ADC Value - Regulated
16 4 260 5 Sound Mapping - F1
16 4 262 54 Sound Mapping - F2
16 4 264 64 Sound Mapping - F3
16 4 266 59 Sound Mapping - F4
16 4 268 12 Sound Mapping - F5
16 4 270 150 Sound Mapping - F6
16 4 272 65535 Sound Mapping - F7
16 4 274 73 Sound Mapping - F8
16 4 276 65535 Sound Mapping - F9
16 4 278 70 Sound Mapping - F10
16 4 280 69 Sound Mapping - F11
16 4 282 42 Sound Mapping - F12
16 4 284 43 Sound Mapping - F13
16 4 286 11 Sound Mapping - F14
16 4 288 45 Sound Mapping - F15
16 4 290 71 Sound Mapping - F16
16 4 292 44 Sound Mapping - F17
16 4 294 74 Sound Mapping - F18
16 4 298 3 Sound Mapping - F20
16 4 300 49 Sound Mapping - F21
16 4 302 152 Sound Mapping - F22
16 4 304 162 Sound Mapping - F23
16 4 306 157 Sound Mapping - F24
16 4 308 167 Sound Mapping - F25
16 4 310 48 Sound Mapping - F26
16 4 314 75 Sound Mapping - F28
16 4 316 0 Sound Mapping - R1
16 4 318 2 Sound Mapping - R2
16 4 320 4 Sound Mapping - R3


Demonstration

Coming Soon!

Decoder Service and Repair

For service/repair, contact the Bachmann Service Department by visiting www.bachmanntrains.com/home-usa/service.php, calling 1-800-356-3910 (toll-free within the U.S. and Canada), or emailing service@bachmanntrains.com. Bachmann’s Service Department is available Monday thru Friday, 8:30 AM to 4:30 PM ET.

You can also send your locomotive to: Bachmann Trains Service Department 1400 East Erie Avenue Philadelphia, PA 19124

Please include a detailed description of your concern and complete contact information. For some service issues regarding DCC sound decoders, the Bachmann Service Department may forward your locomotive to TCS for resolution.

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Bachmann Logo (2020).jpg"DCC Sound Value On Board" is a registered Trademark of Bachmann Industries Inc. and is used with permission by Train Control Systems Inc. (TCS)