Older 3rd Rail steam locos used Lionel Railsounds cards mounted to Train America Studios (TAS) motherboards. One tender truck wheelset has a magnetic disc at its center and a Hall-effect sensor mounted adjacent to that disc, to drive the Lionel chuff feature. I converted my 3rd Rail NYC Niagara to ERR Cruise and Sound (Daylight). I replaced the Hall-effect sensor with the ERR reed switch, which switches on and off as the poles inside the wheel disc pass by. DMM measurement confirms that the switch works as intended. Yet the chuff sound isn't working. I'm wondering if there are too many poles in the disc, causing the chuff scheme to stay in the "off" state continuously, and I should instead mount the little magnet on the wheel and sense that, as ERR intended. Has anyone else been down this road?
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