[Milsurplus] BB-490 test

[Patricia Watkins]

Hi All,=20

 After the 2nd charge cycle, and an 8 hr rest period, one battery had =
12.75 V on one cell, and 12.84 V on the other.  The 2nd battery had =
almost the same voltages.  Hit them with the 50 ohm resistors and got 16 =
hrs for Battery 1 with a final voltage of 12.2 V for both cells.  Looks =
like battery 1 is OK.  Battery 2 had 8.4 V for one cell, and 12.1 volts =
for the other.  Looks like I will open that one and see what I can see.  =
As a side note, the wallwart power supply that came with the unit went =
feet up.  It looked as if the primary opened.  I of course dissected the =
critter and found an unmarked small black plastic object soldered in =
series with the primary.  It looks as if it is at the midpoint of the =
windings.  Looks just like an unmarked .1 UF 50V PC board capacitor.  =
One of the square little black ones.  Anyone else see one of these?  I =
can't believe that they would capacitivly couple at 50 or 60 HZ in a =
transformer primary.  Anyway, I finished charging with a spare 14V power =
supply.  Now to work on that Transformer and open up the battery pack.

Cheers,

John  WD5ENU/A45XV

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