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  1. #1
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    Question Dual Servos on Aftermarket Receiver?

    If I get an aftermarket 2.4ghz radio system would it still be possible to still run dual servos when there is only 1 channel 1 'socket'? The traxxas ones have 2, but this one doesn't. Is there a lead or something that you can use or can you mix the channels? It's a 2ch transmitter and a 3ch receiver. Thanks in advance!
    PS:The transmitter in question is this:
    http://www.modelsport.co.uk/lrp-a2-s...products/38320
    it includes the receiver, but this is the receiver:
    http://www.modelsport.co.uk/lrp-a2-a...products/38063
    Thanks in advance!

  2. #2
    RC Turnbuckle Jr.
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    I gues it can be done with a Y harness

  3. #3
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    But don't they have to turn in opposite directions?

  4. #4
    RC Turnbuckle Jr.
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    I don't think so, not sure since never have done it, but there is no way you can reverse one and the other not even on a receiver with 2 ports when they both work on the same channel.

  5. #5
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    a y harness was used on the 1/10 revo before the new receivers came out so traxxas probably sells one, heres what you're looking for
    http://www3.towerhobbies.com/cgi-bin...?&I=LXWB69&P=7
    I like turtles.

  6. #6
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    Thanks for the link! But they do have to turn in opposite directions, otherwise the steering assembly would move backwards and forwards when you turn. You need your car to see what I mean.

  7. #7
    RC Turnbuckle Jr. JimmyNeutron's Avatar
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    Correct me if I'm wrong....
    But I think a Y harness feeds one servo with reverse polarity?
    Wouldn't that reverse a servo?

  8. #8
    RC Turnbuckle Jr. JimmyNeutron's Avatar
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    I'm wrong. lol

    The servo's are turning the same direction!
    The arm is mounted the exact opposite side of the opposing servo, creating a push-pull effect.

  9. #9
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    Quote Originally Posted by Jimmie Neutron View Post
    Correct me if I'm wrong....
    But I think a Y harness feeds one servo with reverse polarity?
    Wouldn't that reverse a servo?
    No, that would fry a servo. Reversing is done entirely by the signal, not the voltage.

  10. #10
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    the servo horns turn opposite direction because the left is 180 degrees different than the right side with the same direction of rotation
    I like turtles.

  11. #11
    RC Turnbuckle Jr. JimmyNeutron's Avatar
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    The horns are both turning either clockwise or counterclockwise, depending on the direction of the turn.
    It's because of the location of the servos in relation to the turning mechanism in relation to the attachment of the horn itself that it all works as it should. I'll post a picture asap.

    Arakon, if you would read the post just below my incorrect post, you would see that I corrected my mistake.

  12. #12
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    1) If you run dual servos they both always turn in the same direction. I am putting this issue to rest, it is a fact. If you don't believe me or just want to see for yourself move your servo to the other side of the chassis and everything will still work the exact same.

    2) in theory a y harness works just fine. All of this talk about reverse directions and reverse voltages is garbage (see #1 above). The only issue I have heard of with certain receivers is they only supply enough current to run 1 servo not 2 and therefore they do not work. So you will just need to pick up a y connector and just try it for yourself.
    Rally SV2/4600 and fully loaded

  13. #13
    RC Turnbuckle Jr. JimmyNeutron's Avatar
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    As I said I would:


  14. #14
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    ok here is the trick :


    Simply convert the Batt of your new RX to a CH1. The Y harness option also work, but all those wires and extra connectors take too much room.

    It takes less then 10 mins if you know how to solder. This picture was taken before doing the solder joints (see white wire)

    I am running this mod with dual stock servo in both of my MERV without any issue.

    Hope this help.
    What have you learned today?

  15. #15
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    Papino, that looks good, but my soldering skills on receiver are pretty terrible, I tried to replace the frayed arial and it's too small, I got solder on in the wrong places and broke it. That looks way too technical to me.
    Regarding the 'will the receiver BEC handle 2 servos', on paper I say yes because they are designed to handle full size 1/10 servos which draw much more power. 2 mini servos I think would be fine.

  16. #16
    RC Turnbuckle Jr. JimmyNeutron's Avatar
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    According to "servo data base" these mini servo's still draw up to 6v...
    Whatever it is I just typed... could be wrong.

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