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"The serial number is #282955. Starting at serial #282880 the JP-8 came standard with a DCB port, as does this unit. These newer JP-8's are also referred to as JP-8A's.
Beginning with serial number #171700, the 12-bit DAC was upgraded to a 14-bit DAC.
This increased the resolution of the controls. Lucky for you, this unit is the superior 14 bit version.
The soldered-in battery typically lasts ten years or more, ranking these boards among the lowest-maintenance of their generation.
The battery on this unit was replaced last year, when serviced."
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