Dapol OO LSWR Adams B4 with Zimo Sound and Stay-Alive

[John YouChoos]

So, Dapol's recent OO LSWR Adams B4 is a pretty little thing, but very tight on space inside, not to mention tricky to get into without things dropping out, but DCC sound is indeed possible with a bit of careful positioning of kit... we even managed to get the Zimo SACC16 stay-alive PCB in with a couple of 330uF Tantalum capacitors... here's a brief outline of how we did it:

 

First, the model, showing the interior, with the neat little 2-LED firebox unit which is a nice touch from Dapol:

 

 

Here's the kit coming out, and the kit going in (Zimo MX649F which will be hard-wired, YouChoos Minnow4 speaker, SACC16 stay-alive board, and 330uF Tantalum):

 

 

Factory PCB removed and mounts snipped off:

 

 

Decide to go with a pair of Tantalums on the SACC16 board:

 

 

Hard-wired, including separate control of the 2 firebox LEDs on FA1/FA2, needing to add our own resistor to protect them:

 

 

Everything is wired directly from decoder to destination so we don't have too many joins in the wiring, as the model is incredibly tight.

 

All protected in Kapton tape and carefully positioned so that the drive shaft does not foul on the kit:

 

 

Speaker at the top in the nose, secured with Black Tack:

 

 

Full guide and notes available here: http://www.youchoos.co.uk/Index-Resource.php?L1=Guides&Item=OODapolB4

 

Enjoy!

John

 

 

[JohnR]

Hopefully you will be posting a video of it in action?

[John YouChoos]

Hi JohnR, unfortunately not - the loco has gone off to the customer now.  However, I can tell you it ran really well and smooth, even at low speeds.

[dripfedfred]

This is one I completed recently

 

https://www.youtube.com/watch?v=iAXdFmwCwmc

Edited November 21, 2018 by dripfedfred

[Roger Sunderland]

We've just completed our sound fitted B4. It can be seen running on our Bournemouth West exhibition layout at Peterborough on December 8/9. We've also managed to fit a Kadee auto uncoupler in as well. Runs superbly but the track obviously needs to be spotless.