Seems to go to full speed straight away.
Triang Rovex P5 Power Unit Controller OO/HO Model Railway Transformer Item Unbox
Triang P5 Power Units Controller & RT42 Speed Control Unit - UNTESTED
TRI-ANG P5 Power Unit for Model Trains UNTESTED Sold as SPARES/PARTS
Triang No1 Power Unit 12V-1A DC Output Vintage Untested
VINTAGE TRIANG RAILWAYS P5. POWER CONTROLLER UNIT
Tri-ang Power Units P5 Power Controller Instruction Leaflet P.3/17720/3
