Heljan OO Class 77 Electric with Zimo Sound and Stay-Alive

Kit: MX644D; SuperCap6800; Original Speaker

Very simple install in this finely-detailed model from Heljan. MX644D 21-pin sound decoder plugs straight in. Heljan already provide a built-in speaker, which is OK, so we just reuse that. It isn't the loudest, and doesn't seal very well against the chassis, so a little work is required to do that, but otherwise easy.

We also include a SuperCap (via SACC16 kit) for stay-alive - probably a little overkill, as the model picks up quite well, but this will be running on exhibition layouts, so the more reliable the better!

On track, and sound great with our Class 73 sounds.

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.