engenius EOC-3220+ affected by sun / heat

Discussion in 'Wireless Internet' started by schmerold, Aug 16, 2007.

  1. schmerold

    schmerold Guest

    Temperture in St. Louis has been 95-104 degrees. I have 2 EOC-3220+
    units 1/4 mile apart. The EOC-3220+ is mounted on a 10FT pole and
    works well until we get over 90 degrees, then things get spotty. The
    unit is shaded in the morning and works reasonably well, in the
    afternoon, it doesn't work well.

    So, I'm thinking about building a 5 sided box to give it shade.

    Anyone else do this?

    Did it help?

    Care to share pictures?
    schmerold, Aug 16, 2007
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  2. hath wroth:
    I was once marginally involved in the design of a microwave radio
    system that eventually ended up on a pole in the middle of the Arabian
    desert. The primary method of cooling was a heat shield with
    convective cooling. The heat shield wasn't anything fancy. It was
    similar to the double roof on the old Land Rover series vehicles. See:
    The first photo shows the "tropical roof".

    In radio case, it was a piece of flat sheet metal, mounted on 4
    thermal insulators, with one piece on each large face of the box. The
    flat plates got nice and warm, but the box underneath was sufficiently
    cooler to survive.

    I almost forgot. Paint everything glossy white. That makes a huge
    difference in solar warming.

    However, I think you may have a different problem. The Senao/Engenius
    boxes are not terribly energy efficient. They get quite warm. I'm
    not sure what it actually draws, but the power supply is rated at
    48VDC 0.375A or 18 watts. It probably burns about 12 watts, which is
    quite a bit for the plastic box. What I think you'll need to do is
    find the major sources of heat on the circuit board, attach heat sinks
    or heat pipes to the components, and somehow get the heat out of the
    box and into the surrounding air. That's not going to be easy. If
    you can't do that, get a fan and use it to move some air through the
    box. You should also make some thermal measurements to see if you're
    making any progress.
    Jeff Liebermann, Aug 17, 2007
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