I noted today that MTH recommends that accessories in a DCS layout be run from a separate transformer to avoid making the DCS signal pass through coil windings or a circuit board. However, using the ZW as an example, the accessories are typically run from a separate TAP on the transformer than the track voltage, AND the DCS signal is injected downstream to the transformer anyway (in the TIU). So does the DCS signal backfeed through the TIU into the ZW?
The accessory tap on your ZW technically is a separate transformer. You shouldn't have a problem. I'm only about 99% sure of this but no, the DCS signal should not back-feed through the transformer windings. The DCS signal comes from the output side of the TIU. Your transformer is connected on the input side of the TIU.
There is a DCS signal filter (aka choke) inside the TIU so that the DCS signal on the track does not "backfeed" into the transformer at the TIU power input connections. However, if you are using the so-called passive-mode where the transformer directly connects to the track, you should add this DCS signal filter (aka choke) between the transformer and the track.
The accessory taps on a PW ZW is not a separate transformer. The ZW has one primary winding and one secondary winding. All 4 "taps" are rollers running over the secondary. All output amperage flows through the same coil wire. Stan2004 is correct
I was at a train show today talking trains and a man said he had problems in the past with modern Lionel train loads reacting with the train car, similar to the old Lionel #65 handcar. He mentioned a car that Lionel had shipped with a plastic layer between the tractor tires and the car. When I got home I looked and sure enough there is a plastic separator between the tires and the train car surface. Does anyone know why this separator was put under the tractor tires,? I checked some othet...
I think some later models maybe came with the sheet from the factory to try to eliminate the problem. The particular example from the mid to late 90's that I remember as being the worst (of the models I had or observed) was the 16955 Santa Fe flat with Challenger ( example here ). The Challenger had treads and every example I have ever seen had the treads pattern somewhat "melted" into the surface of the flat (or at least made a permanent mark). Some of the worst ones (where there was never...
Bad reaction between vinyl tires and plastic is a old issue and curse of the vintage model cat collector. Paint will usually keep it from happening or you can make protectors from about anything but unpainted polystyrene plastic. Not 1--% of model tires react to plastic so maybe MTH used the type need to not react.
Had just about all these cars when they first came out. The first two cars issued were the 16934 flat w/ grader and 16935 flat w/ bulldozer. If I recall correctly, the first two cars didn't have the clear plastic. Forget exactly at what point Lionel started to add the clear plastic, but certainly some of the earlier cars in the series did have the wheel melt issues.
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