last site update 3rdJan2019

view our privacy policy

Shopping Basket

Technical Resources & Reference
About YouChoos
YouChoos British Sounds
Sound Decoders (blank)
Standard Decoders
Function & Accessory Decoders
Lamps & Lighting
Seuthe Smoke
Electronics & Connectors
Tools, Glues & Adhesives
Ready-To-Run Models
DCC Systems, Feedback Modules & Programmers
Install Guides
Quick Helps
Technical Resources
CT Documentation
Build your own sounds for CT
How to Order
Fitting Services
What's New?
Customer Feedback
Useful Links
YouChoos Resources YouChoos Resouces YouChoos Resouces
Bachmann OO Gauge LBSCR H2 Atlantic DCC Sound

Kit: MX645, LS40X22X09-2W Dual Dumbo, SACC16 with SuperCap17000

A really easy DCC Sound install of this fantastic model would be the MX644D with an LS26X20X08-1W Dumbo - plug-and-play, but we wanted a challenge to fit a dual Dumbo speaker and a 17000uF SuperCap for stay-alive...

Pause for a moment to show how easy the MX644D 21pin decoder and LS26X20X08-1W Dumbo would fit, before we continue...

That's a lot of kit to get in the tender, so we need to strip it down first... remove the weights and the 21pin DCC socket, and flatten the round speaker mount on the base of the tender.

We remove the MX645's heat shrink and take away any unrequired wires (lighting), then re-cover with Kapton tape.

Solder the pickups and motor wires onto the connection board (worth doing a line-test to check which ones are which before you start!)

SuperCap sits on the floor, with dual Dumbo speaker on top. Tight, but not too difficult.

The results are even better than we expected - the performance from the stay-alive is excellent (around 5 seconds backup time) and the dual Dumbo works very well with the tender shape and is very loud with a great full sound.


Please note that these guides are provided as useful resources for you, as-is. YouChoos cannot be held responsible for errors in the information, or for any damage caused to your models or equipment if you choose to follow any of the steps detailed here.

A bit of YouChoos poster art for your enjoyment!