NixTrainz SoundTraxx Conversion Kit for ScaleTrains Locomotives - NTZ501

NixTrainz ScaleTrains Conversion Kit – Decoder Buddy V5B + Power Bridge III + Speaker Upgrade

Upgrade your ScaleTrains locomotive with confidence! The NixTrainz ScaleTrains Conversion Kit is the ultimate plug-and-play solution for modelers who want smoother performance, reliable power retention, and modern decoder compatibility. Engineered specifically for popular ScaleTrains models, this kit gives you everything you need to install a 21-pin decoder, add stay-alive performance, and upgrade your sound system in one streamlined package.

Designed for hobbyists who demand professional-grade results, the kit includes the Decoder Buddy V5B board, a Power Bridge III with dual 1.0F supercapacitors, and a high-efficiency Scale Sound Systems speaker — delivering cleaner wiring, stronger electrical distribution, and crystal-clear sound. Whether you're adding sound for the first time or completely modernizing your locomotive’s electronics, this kit dramatically simplifies the process.

Compatible ScaleTrains Models

Designed for seamless installation in:

• GP38-2

• GP40

• SD40-2

• SD45

• GE B39-8

• GE Dash-9

• ES44 / ET44 / C44 / GEVO / Tier 4 units

What’s Included

• Decoder Buddy V5B (1.0K resistors) – Clean, organized wiring for 21-pin decoders

• Power Bridge III – Two 1.0F supercapacitors for unmatched stay-alive performance

• Universal #1 Scale Sound Systems Speaker (with enclosure) – Clear, powerful sound output

• Mounting adhesive – Easy installation, secure hold

(Decoder not included — works with most 21-pin decoders.)

Key Benefits

• Simplifies installs in ScaleTrains locomotives — no guesswork

• Improves reliability with dual supercaps for smooth running over dirty track

• Cleaner wiring & easier troubleshooting with the Decoder Buddy platform

• Boosts sound quality with a high-performance speaker enclosure

• Maximizes lighting & function options via modern 21-pin decoder support

This is one of the most powerful upgrade paths for ScaleTrains diesel locomotives, allowing modelers to achieve professional sound, smooth operation, and fully customizable DCC functions with far less effort.

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