Batteries and Power Supply for the  i-Source
             ------------------------------------------------


                                                         Rev.  29-SEPT-1993



Batteries
---------

The batteries are:   Yuasa  model NP7-12   12 Volt   7.0 Amp-Hour

These batteries specify the following charging:


                                   Voltage               Initial Current
                                  Regulation          (i.e. maximum current)
                            ----------------------   ------------------------
   Standby Use Charging      13.50 to 13.80 Volts            no-limit

    Cyclic Use Charging       14.4 to 15.0  Volts            1.75  Amps





Power Supply Adjustment
-----------------------

The built in isolated positive and negative  "15 Volt"  power supplies
in the Digital Box have been set at:  14.10 Volts.  The current limits
on these supplies have been set between  500 ma and 550 ma.

This is accomplished on the positive power supply by adjusting the
voltage and current limit control pots.  On the negative supply this is
accomplished by setting the voltage with its adjustment pot and setting
the current limit by shunting the resistor R13 (a 240 ohm resistor) with
a 150 ohm resistor.