TMCC 2 chuff to 4 chuff?

This locomotive uses a cam and a cherry switch to make a chuff signal. That signal, is translated by the radio board and sent to the sound system via serial data . Most TMCC steam only have a 2 lobe cam. ( 2 chuffs per revolution )  To get 4 chuffs per revolution, you’d either have to change the cam to a 4 lobe type, or install something like John’s ( gunrunnerjohn ). Chuff generator & super chuffer.

Pat

@harmonyards posted:

To get 4 chuffs per revolution, you’d either have to change the cam to a 4 lobe type, or install something like John’s ( gunrunnerjohn ). Chuff generator & super chuffer.

Well, you only need the Chuff-Generator and a small 5VDC supply just to change the chuff rate, the Super-Chuffer II is the unit that controls the smoke unit fan and adds optional lighting features.