Sound chip for class 71

[trainboy]

Hi,
I just purchased a sound chip from DCkits for my MM 071 loco. When I received the chip it had a detached speaker included in the box and a a square piece attached/wired to the chip. Does anyone here know what the attached square piece is for? The  chip did not come with any install instructions and I know that the Murphy 071 loco already has a speaker installed. See pic below.

thanks, brendan

 

 

[WRENNEIRE]

Just cut the 2 wires, I think the chip should work then with the MM speaker already installed?

[murphaph]

Yep, Dave is right. Just cut the speaker that came with the decoder off and fit to the loco and you're done. The square thing is the speaker+enclosure but the factory fitted speaker in the 071 is probably a better solution. Make sure you don't leave a short by cutting the two wires so close to the decoder that copper strands could splay out and touch each other. If you're skilled with a soldering iron you can just desolder the two wires, again being careful not to leave a short. The safest solution if you're not skilled in this stuff is to cut the two wires at different lengths and then put a bit of electrical tape around each end and tuck the wires somewhere where they can't short against each other or the chassis etc.

[trainboy]

Wrenware and Phil,

thank you so much for the helpful info.

Brendan