[Elecraft] Fw: K2 Battery charging Problem

[Don Wilhelm]

David,

Check to be certain the resistor in the positive battery lead is 
intact.  Remove the connector from the RF board and the connector from 
the battery terminal.  Read the resistance between the red wire at the 
connector and the  terminal that connects to the battery.  You should 
find a low resistance - note what it is, then switch the DMM leads and 
measure again.  You should find 6.2 ohms with the leads in one direction 
and in the other direction, you may measure less than 6.2 ohms depending 
on your meter and the exact forward voltage of the diode.
If you find a high reading in one direction, the 6.2 ohm 2 watt resistor 
in the battery option wire (under the heat shrink) has opened - if that 
is the case, the battery will not be charged from the K2 power supply 
connection.

If the resistance is correct in both directions, then you may conclude 
that you have a defective battery.

73,
Don W3FPR

On 12/15/2011 8:17 PM, richko at juno.com wrote:
> ---------- Forwarded Message ----------
> From: "richko at juno.com"<richko at juno.com>
> To: elecraft-request at mailman.qth.net
> Subject: K2 Battery charging Problem
> Date: Thu, 15 Dec 2011 21:39:30 GMT
>
> Recently purchased and installed a new 2.9 amp battery in my K2. It arrived and I measured the voltage at 10.6 instead of being fully charged to 12V according to the book. As measured with the K2 internal voltmeter the readings were  V 10.6 and current 0.32. That current reading is nowhere near the 200 to 250 ma indicated in the book.
>