Mikado posted:The history of the Railsounds system rolls up like this.
Railsounds 4.0; Same feature set as 2.5 & 3.0, but the PCB's changed again. The RS 4.0 series of PCB's lasted the longest and are in the largest number of locos in circulation. A new Power board was created, more stable and did not require a heat sink. The audio board changed as well.
Railsounds 4E stopped in for a while, this was simply an increase in the space in the PIC or ROM, where there was "extra sounds" added. The sound quality was the same as 4.0 there were just "more" sounds. So, 4E is a capacity change moreso than a hardware change.
Hope this clears up any confusion and gives you some insight into what is what, when it comes to the history of Lionel Railsounds.
Thanks,
Mike
So the K-Line FM Trainmaster (K2438-0857CC) I just bought has the above board inside. Looking closely at my board, it has printing on it that shows "RS3 Rev C Lionel Trains 691-PCB1-04C" That number led me to believe that I have Railsounds Three instead of RS4 as shown above.
In actual use, AUX1-2 produces only a single (garbled) communication; similarly AUX1-7 Towercom produces only a single "Green Light" communication, albeit much clearer. So what do I have, 3 or 4?
George
