I am getting closer to ordering the track I need for my layout, and I have a question about Ross switches. I am going to buy them prewired with dz1000 or 2500 machines (haven't decided yet). Ross mentions with certain switches that you may need a dz1008 relay (I assume for engines with shorter distance on their rollers, to allow powering the frog I would guess?? <---total ingnoramus, and my dad was an EE *okay, dad, stop growling, I can hear you from here*).
Ross on some switches, like the double crossover or some of the yard switches, indicates where you may need it.
I don't have anything exotic in terms of switches, I am using
O31s in industrial/dock area
054/072 curved switch
O72 switches
#4 switch pairs for crossovers
#170 4 way yard switch.
The kind of small engines I am talking about are engines like the Lionel conventional Docksider, the K line Plymouth switcher, an RMT Bang S4, plus possibly some of my old motorized Lionel units like the burro crane/fire car. Most of my other engines are larger engines that likely had pretty wide spread between the rollers.
The only one I could see needing it might be the 170 4 way yard switch, but on the Ross site they don't mention whether they think this needs it or not the way they do with some other switches.