Reply to "Atlas O TMCC signal issues"

Eventually the size and position of the antenna, (SW models) was improved. Silver plate top of cab, (see picture).   SW models never had electronic speed control, and worked well with a large horizontal motor and flywheel.

RS1 were the first model to have an early speed control.  Unfortunately the ramp-up was not linear.  It was exponential, that required,  a little, getting uses to.   30 Years later, a lot of the initial technology has been discontinued.