Thanks to all for both the posted and direct responses. I have the open
circuit terminal voltage up to 12.8V right now, and it drops to 12.1
when I power the K2 with it. It is a PowerSonic 12Ah battery, but I
will have to do some checking to see if its capacity is still up there.
FWIW: I finally gave up on limiting the charging current with a
resistor -- it was too unwieldy to try and keep the current reasonably
constant. Based on n a very poorly remembered factoid from high school
chemistry (cold slows chemical reactions or something like that), I left
it outside for several hours in 35 deg weather. Sure enough, when I put
it directly across the supply, it began drawing about 1.5A, which slowly
rose as the battery warmed. When it got to 3A (it seemed to be rising
faster the higher it got), I exiled it back outside for awhile. After 2
or 3 of these cycles, the charging current started at about 1.5A, and
then slowly fell rather than go up. Currently, floating on the supply,
the current is about 80mA.
Again, thanks for all the advice.
73 and Merry Christmas to all
Fred K6DGW
Auburn CA CM98lw
Hope to work you all in the Stew Perry tonight. I need the points!
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