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Thread: Atlas twin switches

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    Default Atlas twin switches

    Does anyone have an recent experience with the latest switches? The two that I purchased were both duds. Plan to use the switches for turn back polarity reversal Not will use two DPDT mechanical switches.

    DaveK.

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    Hello, @DMK, I saw your previous, unanswered question in another post yesterday, and I got the impression you'd already decided to use two DPDT switches.

    And that's what I'd recommend, regardless of whether the Atlas reversers work. Get two robust DPDT toggle switches and wire them based on the drawings I've linked to below.

    Wiring a DPDT switch:
    https://www.digitrax.com/tsd/KB71/dp...trical-switch/

    Wiring for reversing a reverse loop's polarity:
    https://images.app.goo.gl/Hg87Vbe9idh4HB6t6

    Wiring for reversing the main track's polarity:
    http://www.azatrax.com/model-railroad-reverse-loop.html

    Reversing the polarity of the main is simpler operationally.

    You might also look into the Circuitron AR-1 autoreverser: https://www.google.com/url?sa=t&sour...DRzUInC2HYJuz3
    Last edited by The Ol' Curmudgeon; 27th Mar 2021 at 05:55 PM.

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    I guess it's odd. I have rarely ever had a problem with any of the Atlas switches. I have selectors that are 50+ years old and still work.

    Doug
    Atlas First Generation Motive Power and Treble-O-Lectric. Click on the link:
    www.irwinsjournal.com/a1g/a1glocos/

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    The diagram in the first link has it wrong. It's the mainline that needs reversing of polarity, not the loop, although there are usually reversing switches for both the mainline and loop (as shown in the second link) so a train can enter the loop from either route through the track switch.

    Doug
    Atlas First Generation Motive Power and Treble-O-Lectric. Click on the link:
    www.irwinsjournal.com/a1g/a1glocos/

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    Quote Originally Posted by Doug Gosha View Post
    The diagram in the first link has it wrong. It's the mainline that needs reversing of polarity, not the loop, although there are usually reversing switches for both the mainline and loop (as shown in the second link) so a train can enter the loop from either route through the track switch.

    Doug
    I would not say "wrong," but rather there are two ways of addressing it -- reversing polarity of the loop, or reversing polarity of the main.

    Reversing "in the loop" is not the preferred method, though, because it requires simultaneously moving the DPDT toggle and reverse switch on the throttle. I put a better link above that shows reversing the main polarity, which is the easier of the two for certain.

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    IF you reverse polarity when the train is in the loop it will stop and reverse on direction ON A DC SYSTEM. It is not stated whether it is a dc or dcc, fut from the use of atlas switches in stead of a auto reversing it appears to be dc.

    Doug

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    Quote Originally Posted by SluderD View Post
    IF you reverse polarity when the train is in the loop it will stop and reverse on direction ON A DC SYSTEM. It is not stated whether it is a dc or dcc, fut from the use of atlas switches in stead of a auto reversing it appears to be dc.

    Doug
    You are correct, and that method requires what I mentioned above -- simultaneously moving the DPDT toggle and reverse switch on the throttle. Rather laborious, but it's still an idea that's out there amazingly.

    Reversing the main polarity while a train is in the loop is easier and it's what many of us would prefer. But it's good to address either option. It may answer a question the OP thought of but didn't ask.

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    Appreciate all of the help.

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