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! TheNixTrainz ScaleTrains Conversion Kitis 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 theDecoder Buddy V5B board, aPower Bridge III with dual 1.0F supercapacitors, and ahigh-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 installsin ScaleTrains locomotives — no guesswork

• Improves reliabilitywith dual supercaps for smooth running over dirty track

• Cleaner wiring & easier troubleshootingwith the Decoder Buddy platform

• Boosts sound qualitywith a high-performance speaker enclosure

• Maximizes lighting & function optionsvia modern 21-pin decoder support

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

---

ScaleTrains conversion kit, NixTrainz conversion kit, DCC upgrade kit ScaleTrains, Decoder Buddy V5B, Power Bridge III stay alive, Scale Sound Systems speaker, DCC 21-pin conversion, SoundTraxx 21-pin compatibility, ScaleTrains DCC electronics, model train decoder upgrade kit