In my last post I described that my train was still uncoupling and the fix.
I suggested that you file the top of the coupler. Why take from the top? … I thought I had better talk on this.
As some of us are aware, the couplers are meant to sit at a specified height. If you remove material from the bottom of a coupler, you will change the coupler’s height and it will sit lower that the attaching coupler. (The coupler to the next piece of rolling stock.)
That is why I suggest removing material lightly from the top. It doesn’t take more then just a tiny, thin layer to file down.
The same goes for installing the thinner decoders into the top of N-Scale engines, or any engine for that matter.
If you have a decoder that is too thin and it slips and slides around inside the engine when you install it, just add a tiny drop of solder to the 4 corners where the decoder makes contact with the engine’s body for electrical pick up. The solder is softer then the metal tabs and will easily shave off to the correct thickness needed to fill the gap.
I must warn you, “Never add solder to the bottom of the decoder contacts.” This will raise up the decoder an you will shave away the top contact pads. The copper trace on the printed circuit board is just held on by a glue. Raising the decoder will damage the decoder and make it useless, because there will be nothing to connect the decoder to the engine’s body for electrical pick up.
I alway welcome comments and questions relating to my posts, it might help others to enjoy this hobby. David