View source for Bachmann 4-6-4 ALCo J3a Hudson - HO

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Information on this wiki page provides particular details about this model not found in our basic guide.
{{Infobox locomotive
|name=Bachmann 4-6-4 J3a Hudson
|Manufacturer=Bachmann
|Scale=HO-Scale
|Stock Number=53601-53604
|Power Type=DCC Dual Mode w/Sound
|Release Date=2023
|Retail Price=$479.00
|Decoder Type=WOW121-Steam
|Version=4.6
|Functions=2
|Builder=American Locomotive Company (ALCo)
|Build Date=1937–1938 (J-3)
|Motive Power=Steam
|Cylinders=Two 22.5in × 29in (572mm × 737mm)
|Power Output=41,860 lbf (186.20 kN)
|Prototype Link=[https://en.wikipedia.org/wiki/New_York_Central_Hudson NYC Hudson]
|image=NYC_Hudson_2.jpg}}

==Overview==
Bachmann’s new DCC sound-equipped ALCo J3a Hudson includes a TCS WOWSound® decoder with factory-preset prototypical sound configuration. This model also includes Keep-Alive® for uninterrupted operation, even over dirty track. The WOWSound® Steam locomotive sound package includes sounds for whistle, bell, steam chuff, air pump, blower, injector, coupler close/release, brake release and application, and many more!

Loaded with prototypical features, the J3a hudson in HO-scale from Bachmann Trains brings all the sights and sounds of the mighty era of passenger steam 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 true CD-quality audio (16-bit, 44,100Hz)
*Authentic and prototypical sounds set by default
*Over 50 whistle and over 40 bell options
*Keep-Alive® included, which 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
*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)
*Two select-able [[Throttle Modes|Throttle Modes]]
*Two configurable [[WOWSound Momentum Function|Momentum Modes]]
*TCS' exclusive Function Pagination System
*Die-cast frame

==Additional Features==
The {{PAGENAME}} is at its heart a WOWSteam 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 Steam 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.

Note: This WOWSound® product includes TCS' Audio Assist® auditory feedback program.
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==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 [https://www.tcsdcc.com/_files/ugd/559cd7_d3fbf8b528984a7a8c59874c9dcdd508.pdf Comprehensive Programming Guide], [https://09122110-fb14-4cd5-92e8-876baa0f5900.usrfiles.com/ugd/559cd7_756265e33255426eaa159b6f8e059111.pdf WOWSteam Programming Guide], and/or [[NMRA Standard CV's|List of Standard CV's]].

{{:Function Pagination}}

{{Button Mapping Paged
|function 0 sound=None
|function 0 light=Headlights
|function 0 dual=Yes
|function 1 sound=Bell
|function 1 light=None
|function 1 dual=No
|function 2 sound=Whistle - Long Blast
|function 2 light=None
|function 2 dual=No
|function 3 sound=Whistle - Short Blast
|function 3 light=None
|function 3 dual=No
|function 4 sound=Blow Down
|function 4 light=None
|function 4 dual=No
|function 5 sound=Cylinder Cox
|function 5 light=None
|function 5 dual=No
|function 6 sound=Water Fill
|function 6 light=None
|function 6 dual=No
|function 7 sound=None
|function 7 light=Dim Headlights
|function 7 dual=Yes
|function 8 sound=1x Press Mute/Unmute <br> 2x Press rotate light/sound mode or page <br> 4x Press Audio Assist™
|function 8 light=None
|function 8 dual=Yes
|function 9 sound=None
|function 9 light=None
|function 9 dual=No
|function 10 sound=Blower
|function 10 light=None
|function 10 dual=No
|function 11 sound=Injector
|function 11 light=None
|function 11 dual=No
|function 12 sound=Coupler Crash
|function 12 light=None
|function 12 dual=No
|function 13 sound=Coupler Release
|function 13 light=None
|function 13 dual=No
|function 14 sound=Brake Release
|function 14 light=None
|function 14 dual=No
|function 15 sound=Train Brakes
|function 15 light=None
|function 15 dual=No
|function 16 sound=Momentum
|function 16 light=None
|function 16 dual=No
|function 17 sound=Safety Valve
|function 17 light=None
|function 17 dual=No
|function 18 sound=1x Press Mute/Unmute <br> 2x Press rotate light/sound mode or page <br> 4x Press Audio Assist™
|function 18 light=None
|function 18 dual=No
|function 19 sound=None
|function 19 light=None
|function 19 dual=No
|function 20 sound=Grade X Quill
|function 20 light=None
|function 20 dual=No
|function 21 sound=Forward Quill
|function 21 light=None
|function 21 dual=No
|function 22 sound=Reverse Quill
|function 22 light=None
|function 22 dual=No
|function 23 sound=Stop Quill
|function 23 light=None
|function 23 dual=No
|function 24 sound=Rotate Bell/Horn
|function 24 light=None
|function 24 dual=No
|function 25 sound=Ash Pan Cleaning
|function 25 light=None
|function 25 dual=No
|function 26 sound=Station Announcements Departing
|function 26 light=None
|function 26 dual=No
|function 27 sound=Station Announcements Arriving
|function 27 light=None
|function 27 dual=No
|function 28 sound=1x Press Mute/Unmute <br> 2x Press rotate light/sound mode or page <br> 4x Press Audio Assist™
|function 28 light=None
|function 28 dual=No
}}
{{Random Mapping
|random sound 1=Air Compressor
|random sound 2=None
|random sound 3=Injectors
|random sound 4=Safety Valve}}

==Sound List==
Please refer to the [[WOWSteam Version 4.6 Sound List]] for a complete list of sounds included on this decoder. 

==CV Addendum (Standard CV's)==
The {{PAGENAME}} follows the motor and lighting CV's as described in in TCS' [https://www.tcsdcc.com/_files/ugd/559cd7_d3fbf8b528984a7a8c59874c9dcdd508.pdf Comprehensive Programming Guide] and [[NMRA Standard CV's|List of Standard CV's]]. Listed below are the CV's that have been modified for the {{PAGENAME}} decoder.
{| class="wikitable" style="text-align: center; vertical-align:top !important;"
|-
! scope="col" |CV
! scope="col" |Value
! scope="col" |Description
|-
|-
|[[CV 3]]
|6
|Acceleration Rate
|-
|-
|[[CV 4]]
|6
|Deceleration Rate
|-
|-
|[[CV 49]]
|40
|F0F light feature
|-
|-
|[[CV 50]]
|24
|F0R light feature
|-
|-
|[[CV 51]]
|33
|F1 light feature
|-
|[[CV 61]]
|41
|Configuration CV #2
|-
|-
|[[CV 139]]
|0
|Brake Button Remapping (0-6)
|-
|-
|[[CV 123]]
|0
|Rule 17 Dimming Button Remapping (0-6)
|-
|[[CV 158]]
|4
|Rule 17 Dimming Button Remapping (7-12)
|-
|-
|[[CV 177]]
|0
|BEMF Overall Responsiveness
|-
|-
|[[CV 179]]
|4
|BEMF Low-Speed Sensitivity
|-
|[[CV 181]]
|6
|BEMF Critical Speed Step
|-
|-
|}

==CV Addendum (Indexed CV's)==
The J3a Hudson decoder follows the motor and lighting CV's as described in TCS's [https://09122110-fb14-4cd5-92e8-876baa0f5900.usrfiles.com/ugd/559cd7_756265e33255426eaa159b6f8e059111.pdf WOWSteam Programming Guide]. Listed below are the TCS Indexed CV's for the Bachmann J3a Hudson decoder: 

===Sound CV's===
The table below lists all of the Indexed CV's used to configure "sound-related features" of the decoder. To use the information in this table, first program CV 204 with a value of 4, CV 202 with the value shown in the first column, and then use CV 203 and CV 204 to change the configuration. 
{| class="wikitable" style="text-align: center;"
|+Sound CV's (CV 201 = 4)
! scope="col" |Indexed CV 
(CV202)
! scope="col" |Indexed CV Value (CV203,CV204)
! scope="col" |Description
|-
|-
!8
|0,7
|Whistle Type Selection (New York Central Hudson 5-chime)
|-
!10
|0,40
|Master Volume
|-
!11
|0,4
|Locomotive Type
|-
!14
|3,3
|Dual-Enabled Functions
|-
!19
|128,248
|User Options 
(0) Enable CAM
(1)   Enable Layout Sound (Disabled in Gen. 1)
(2)   Enable Mute on startup
(3)*  Allow Articulated Chuff to Slip
(4)*  Enable Rotate whistle/bell Audio feedback 
(5)*  Enable Light Mode/Sound Mode Audio feedback 
(6)*  Enable Audio auto shutoff timer 
(7)*  Use momentary button 2 as toggle while in Audio Assist
(8)   Enable Articulated Chuff
(9)   [not used]
(10)  Reverse Directional Whistles
(11)* Enable Power Braking
(12)* Enable Momentum Mode Audio Feedback
(13)* Enable Johnson Bar Audio Feedback

(14)  Enable Function Pagination||NOTE: Set to Enabled by default for Bachmann OEM decoders
(15)  [reserved] 
|-
!23
|0,7
|Minimum Chuff Volume
|-
!24
|0,19
|Bell Type Selection (New York Central Hudson Bell)
|-
|}
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<noinclude>
==Demonstration==
<embedvideo service="youtube">https://www.youtube.com/watch?v=_ugdKLJZGdA</embedvideo>
==Decoder Service and Repair==
{{BachmannService}}
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[[Category:Bachmann]]
[[Category:HO Scale]]