S-Helper Service SW9 Notes


(photo © Holt Apgar)

This model won the "S Scale Locomotive of the Year" in 1999, as voted on by the readers of Model Railroader magazine.


The first run of this locomotive did not have the EMD builders plate on them. They were added with the second run.

Operator's Manual

Operator's Manual


(photo © Peter Vanvliet)

The three wires coming out of the cab are: common, rear headlight, and cab light (NW2 shown in the photo, but all SHS switchers were wired the same way).

Printed-circuit Boards

This circuit board is for the
- AC or DC power
- non-sound version
(part #653-X00????)
Notes about DC shorting plug

Replacing the PC Board

Soundtraxx Tsunami Sound

Below are the instructions for installing the Soundtraxx Tsunami (first-generation) into this locomotive. The article was written by Bill Clark and made available by Don Thompson.
Tsunami Installation Guide

Don Thompson provided the Configuration Variables (CV) settings with which the models were configured when they were shipped from S-Helper Service.
Tsunami Configuration Variables (CV) Settings

QSI Revolution Sound Decoders

Don also provided the document for installing the QSI Revolution sound decoders.
QSI Installation

DCC Installation

Installing a Lenz Gold Decoder

Installing a Lenz Gold & SoundTraxx DSX Decoder


Micheal Ostertag shows how to disassemble and remove the paint

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