Class 37 sound for 'OO' gauge
In this online feature we show how to install digital sound into the Bachmann Class 37 using a ZIMO MX644D decoder and Rail Exclusive speaker.
The Bachmann Class 37 looks great and with digital sound it really comes to life. We've installed sound into a number of these popular locomotives for our 'OO' gauge exhibition layouts, so we thought we'd show you how we do it on video too with split headcode D6711 in BR green.
Our decoder of choice is a ZIMO MX644D 21-pin type which is loaded with Digitrains ZS37-0ASL sound file. It features a comprehensive range of sound functions including active brakes on F2, coasting sounds on F6, full-power thrash on F8 plus all the ancillary sounds you could want. We've paired this with a Rail Exclusive 40mm x 20mm twin speaker, which requires a small modification in order for it to fit comfortably inside the Class 37 bodyshell, together with one of Digitrains 870007 compact stay alive capacitor packs.