• mx4000

    From LU9DCE@21:5/101 to BBSRT on Sun Jun 30 06:40:05 2019
    GET LONGER BATTERY LIFE FROM YOUR
    REGENCY MX-4000 OR MX-4200 SCANNER

    by Bob Parnass, AJ9S

    The discontinued Regency MX-4000 and MX-4200 are battery
    operated, 20 channel scanners manufactured in Japan by
    AOR. Both scanners contain a low battery warning circuit
    which disables the scanner when the battery voltage falls
    below a preset level.

    A freshly charged battery pack should last at least 5
    hours before needing a recharge. Ron Smithberg, of
    Joliet, IL, complained of getting only 2 hours use from a
    set of freshly charged NiCd batteries in his MX-4200.
    This article describes how we increased his usage to over
    7 hours between charges.

    Both MX models are powered by a pack of 4 AA sized NiCd
    batteries. The battery pack is nominally 4.8 volts and
    has a rated capacity of about 500 mAh. The scanner draws
    about 100 mA when squelched. A good rule of thumb is
    that a NiCd should be recharged when its voltage falls
    below 1.0 volts per cell. Using this heuristic, the MX-
    4200 battery pack should be recharged when it falls below
    4.0 volts under load.
    CONTINUED IN FILE MX4000.3

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