I have a Bachman Spectrum N-scale F7 A-B set that I’m thinking about putting decoders in. These are the older type that ARE NOT “DCC frieldly”. I have some questions:
Have I completely lost my mind?
Is there a step-by-step anywhere with photos?
Any advise from someone who has done this?
What kind of lighting did Prototype B-units have? The model has none, but somehow that doesn’t seem likely.
You should follow the link Randy gave you to isolate the motors, and give you a basic idea of what is involved. When I did this set I didn’t even know TCS excisted. On the A unit I milled the rear top of frame for the decoder to sit in, IT WILL NOT FIT OTHERWISE BECAUSE OF THE CAB I also used the OEM bulb for the headlight. On the B unit they use the same frame as the a unit so the decoder can be mounted where the cab for the A unit would be. Good luck.