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Old April 3rd 08, 02:21 PM posted to rec.radio.amateur.antenna
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First recorded activity by RadioBanter: Jul 2006
Posts: 250
Default MFJ-259Z

Barrett wrote:
The jumper is on in the unit and all the batteries are in there correct
position. The link for the MFJ-259Z on the W&S site is
http://www.wsplc.com/cgi-bin/ss00000...=14&ACTION.y=3

They won't even charge in my Smart charger. They just shut down the charging
as if there no good, but they are supposed to be brand new. Just borrowed
some 1800mA and these are charging fine in the MFJ-259, so it looks like the
problem is with the batteries. I have never experienced this with these type
of batteries before only NiCad's.

=======================================
Suggest you allow a say 100 mA current to flow through the individual
(new)batteries , monitoring the voltage across the battery.
As soon as the voltage is 1.2 V you can further charge in your automatic
charger.
When fully charged , discharge either in your automatic charger or
manually (with a 12 to 15 Ohms resistor) ,down to
1Volt and recharge. The (new) batteries should then work well.

New NiMH batteries often need a few manually imposed charging
/discharging cycles before working properly.

Good Luck

Frank GM0CSZ / KN6WH


 
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