Berkshire President posted:
3) On page 12/48 of the Instruction PDF from the Lionel Website, there is a "nob" that can be turned to increase or decrease something. Would that something be the smoke volume/intensity? Link enclosed for everyone's convenience: https://www.lionelsupport.com/...ONLINEChallenger.pdf
That's to everyone for their time!
-Tony
The knob is volume control. The locomotive has volume adjust under the sand dome. There is another volume adjust for Railsounds under the tender water hatches. See page 9 of your manual.