05-22-2010, 05:30 AM
Russ Bellinis Wrote:I think the biggest impediment to a true walk around control on a large layout was the need to have the throttle constantly "tethered" to the layout. I think the old analog command control systems were the first to allow the train to continue running with the throttle unplugged while the operator walked to the next station. I'm sure that Tony Koester's Allegheny Midland, and Allen McClelland's V&O were both walk around from the beginning. I would guess probably mid 1960's.the motorised ones that our mechanically minded club member copied could be used with the throtle unplugged
and there were several circuits that `held' the speed even if the controller was unplugged available in the hobbiest electronics mags from the early 80's (I made several from Electronics Australia's `readers ideas' column while I was still at school)- I remember my first was based on a 4017 decade counter and a heap of `and' and `or' gates
poopsie chicken tush