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IDR Models NSW 70 Class 
DCC Sound Installation with Stay Alive

Now available with a NEW Remastered Custom Sound Project including the
 "Full Throttle - Drive Hold" feature.

As recommended by IDR Models for Sound

About the NSW 70 Class Locomotive

The NSW 70 class were a class of diesel-hydraulic locomotives built by Commonwealth Engineering, Granville for the New South Wales Government Railways in 1960-61. They were ordered to replace steam locomotives at Port Kembla. Only 10 units were built with the first locomotive, 7001, entering service on the 15th of August 1960 and the last to enter service, 7010, on the 11th of May 1961.

The 70 Class were a very different type of locomotive. They were diesel-hydraulic rather than diesel-electric. But the most obvious difference was they were of an 0-6-0 design rather than a more conventional Bo-Bo or Co-Co wheel arrangement. Their light axle load was specified to allow them to work on the industrial branch and wharf lines in Port Kembla (Near Wollongong, NSW) where they would spend most of their working life around that area. They were also seen shunting around other yards in Sydney including Darling Harbour and Chullora while occasionally used as passenger trains. The 70 class had been found to travel as far as Casino in northern NSW.

On 10 February 1984, 7009 was taken out of service and sent to Eveleigh Railway Workshops with 7008 following on 21 June and 7002 on 13 August, all three were officially withdrawn. On 12 November 1984, the 73 class took over all shunting and transfer duties at Port Kembla resulting in only 3 of the 70 class locos to remain operational. On 10 September 1986, loco 7010 last operated and 7006 stopped the following day bringing an end to the NSW 70 class in operation.

Two of the 70 class locos are preserved, 7007 and 7010 with 7006 and 7008 being preserved-operational.

The NSW 70 Class from IDR Models

In September 2018, IDR Models released the NSW 70 Class Locomotive which includes an 8 Pin socket for fitting a DCC decoder. 
In DCC the Headlights and Marker Lights will operate directional.

For this installation we recommend the ESU LokSound V4.0 (Sound) or the LokPilot V4.0 (No Sound)
The TCS DP5 decoder (No Sound) is recommend for the DIY installer.

We offer DCC or DCC with sound including a Stay Alive Device to enable uninterrupted performance at super slow speeds especially travelling through insulfrog points.

We have tweaked the motor control of the ESU decoder to provide super slow smooth speed which is perfect for shunting operations allowing the loco to move ever so slowly towards its rolling stock. Also for those wanting the locomotive to move off slowly and build up speed like the prototype. You will be impressed with the smooth slow speed motor control.

We offer a light modification for this 70 Class to separate the lights for a more prototypical operation.

Using the ESU LokSound Micro Decoder for the best sound  fit, it offers 4 light function outputs to use with LEDs. So we can modify the model to separate the red markers from the rest of the lighting allowing for individual control resulting in you being able to have red markers on at both ends while shunting in a yard,

DCC Solutions Lighting

For an upgrade to 4 Function Standard Light Modification we can separate the lights as follows:

1) Front Headlight with White Markers - directional with the headlight button or on/off with 1 function button (Not Directional)

2) Rear Headlight  with White Markers - directional with the headlight button or on/off with 1 function button (Not Directional)

3) Front Red Markers - on/off with 1 function button

4) Rear Red Markers - on/off with 1 function button

5) Directional operation for all lights.

The DCC Solutions 70 Class Custom Sound Project packed with sounds and features not found on other sound decoders

Our Custom 70 Class Sound Project now includes these new features:

Full Throttle – Drive Hold

This feature allows you to simulate a loaded or empty train by pressing the F1 function button. When the button is pressed, the motor will remain at a constant speed, while the sound can be controlled independently by adjusting the speed on the throttle. This exciting, new feature gives the operator the ability to have the train crawl in notch 8 or coast at 100 km/h. Release the Drive Hold function button and you simply go back to throttle-controlled speed and motion.

Coasting on Demand
This feature allows you to enter coasting mode whenever you want with a press of a button.Often when coming to a stop, the throttle of a real locomotive is put into Idle and the locomotive coasts to a stop. Another situation that occurs is that once a train is up to speed when operating over
rolling countryside, the driver can coast to maintain a certain speed. By pressing the coast function button, the sound drops into coasting and remains there. Using the throttle speed control, you can now speed up or slow down the train with the sound remaining in coasting mode.
Press the function button to exit coasting and the sound will exit and return to whatever speed is set when exiting.

Working Brake

Press the Brake Function button and your locomotive will come to a stop at a much shorter distance than if you were to bring it to a stop by reducing the throttle speed. Release the brake and your locomotive will move off again or choose to have it remain stationary when the brake is released.

Random Start-up Sequences with Move Off and Stopping Sounds

Now with random start-up sequences including hot or cold engine starts your start up and shut down will not always sound the same.

As your locomotive begins to move off you will hear the sounds of brakes releasing with random speed activated wheel squeal, rail noises and other sounds. Some of these sounds are random or speed sensitive that will turn on/off automatically depending on your take off speed. When the locomotive comes to a stop you will hear the squeal of the brakes, air releases and then the compressor will cut in automatically to fill the reservoirs with air until full and will cut out.

Coupling and Release with Shunting Mode
Activate coupling or release and your locomotive will automatically reduce it's speed to allow for a more realistic coupling or release operation. Once the operation is completed your locomotive will continue to run at slow speed for a few more seconds before returning to the speed set on your throttle.
Brake Squeal on Deceleration 
Activate this function and when you reduce the throttle speed quickly your locomotive will slow up quicker than normal for a short period and you will hear the squeal of the brakes just like if you where to apply and release the brake.
Dynamic Brake Logic Only
We now include a Dynamic Brake Logic Only feature into our Custom Sound Project to allow locomotives that do not have dynamic braking the ability to run in a consist as a trailing unit behind a locomotive that may have Dynamic Braking. This allows the non dynamic locomotive to respond in the same way as the leading unit when the dynamic brakes are activated and the speed on your throttle is reduced.
And includes all these great features to make your IDR 70 Class drive and sound impressive.

Plus these great features:

  • Caterpillar D397 Prime Mover Sound
  • Short Blast and Playable Horn
  • Random Start-up sequences including Automatic Hot or Cold Engine Start.
  • Air and Brake Release Sounds when loco moves off and stops including Brake Squeal.
  • When the loco stops after braking the compressor cuts in to fill the reservoir and will turn off when the tanks are full.
  • Speed sensitive Wheel Squeal and Rail Noise when the loco moves off.
  • Full Throttle Drive Hold - Lock the loco speed and control the sound independently to simulate a heavy loaded or empty train
  • Coasting On Demand
  • Working Brake to bring your locomotive to a stop even when Full Throttle Drive Hold is active unlike other ESU sound files.
  • Brake Squeal on Deceleration that slows up your loco.
  • Directional Coupling and Release with brake line release with auto active shunting mode to reduce the speed of the loco for shunting
  • Stop & Drive Random Sounds including fans, compressor, rail noise, track wheel squeal, air releases and more!
  • Wheel Squeal
  • Guard's Whistle
  • And more (See below for full list)
  • Low beam/High beam Headlight.
  • Motor settings and sound volumes tuned to specifically suit the IDR 70 Class Locomotive Model.
  • Individual sounds slots and master sound volumes can be adjusted by the user to suit personal requirements.
  • Full function button remapping to suit your personal requirements.
  • DCC Solutions High Performance Dynamic Speaker with enclosure producing fantastic sound.


    Standard DCC Installation: Non sound decoder 

    Premium Sound Installation.: ESU LokSound V4.0 with our own 70 Class Caterpillar D397 Custom Sound Project. 

    Here is the selection of sound and function labels using the ESU V4.0 Sound Decoder


    Premium Sound Installation

    Function                   Description  
         0  (HEADLIGHT)       Directional Headlights

          1                          Full Throttle - Drive Hold

          2  (HORN)              Playable Horn

          3                           Short Blast Horn

          4                           Dynamic Brake Logic as a Trailing Loco

          5                           Coasting On Demand

          6                           Brake

          7                           Shunting Mode - Reduces Speed 50% 

          8                           Start Up/Shut Down/Mute

          9                           Reserved for Front White Markers

        10                           Reserved for Rear Red Markers

        11                           Reserved for Rear White Markers 

        12                           Reserved forFront Red Markers

        13                           Reserved for Directional Markers Lights

        14                           Coupling /Uncoupling + Shunting Mode

    Function                   Description  
        15                             Fan

        16                             Compressor

        17                             Brake Squeal on Deceleration

        18                             Wheel Squeal

        19                             Guard's Whistle

        20                             Volume Control (+/-) Double Key Press

        21                             Volume Fader - Reduces Sound 50%

        22                             Headlight High Beam

        23                             Cab Door Open/Close

        24                             Sanding Valve

        25                             Reserved

        26                             Short Air Release

        27                             Front Headlight On/Off

        28                             Disable Start Off and Stopping Sounds

    Note: The above functions are for the LokSound V4.0 Decoder programmed with DCC Solutions Premium Custom Sound Installation.
    To learn how to use these functions see the Info & Help page. All functions can be reprogrammed to suit your own personal requirements.

    Options Available 

    ESU LokSound V4.0 Sound Decoder programmed with DCC Solutions Custom 70 Class Sound Project

    ESU LokPilot V4.0 (Non Sound Decoder)

    Stay Alive Device