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  1. #1

    Join Date
    Jun 2007
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    hamilton, CA
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    Analog retract servo

    Hi, am gearing up a large scale glider using the 10ch rx and have read that some analog servos are incompatible anyone know if the JR retract servos are ok to use? Tankey

  2. #2

    Join Date
    Mar 2003
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    Leesburg, VA
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    RE: Analog retract servo

    Do a search on 791 and you will see a lot about a 6v problem and resolutions.

    I'm using a JR 791. These servos have a problem, if you run them on 6V. The input signal voltage level which the newer receivers in general output doesnt trigger the servo. - ~2.5v input signal level,while the old receivers were typically over 4V level. There are a couple of ways round this. Either run the servo with 4.8V or buffer the receiver signal level to boost it.

    I used a booster for my 791 and it runs fine using 6v with Airtronics receiver.

  3. #3

    Join Date
    Mar 2007
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    RE: Analog retract servo

    Most Analog proportional servos cannot keep up with the fast data rate of the SD-10G. However, the JR 791 is just a switcher type servo, and it is not proportional. It operates by a change in pulse width, e.g., wide to narrow for one direction of rotation and narrow to wide for the other direction; therefore, you should not have a problem.

    Airtronics Technical Support
    800-262-1178


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