[Elecraft] Not 0-40C

[Mark Petiford]

The KXBC3 is simply shutting off the charge current until the cell temperatures drop back to the 0 to 40 deg. C charging temperature range.  Charging will continue once that happens.  (Reference: "Elecraft KXBC3 Installation and Operation Rev A2", page 4).   Just another example of the protections Elecraft built into this radio.

The temperature increase normally occurs near the end of the charge cycle as the NiMH cells approach the fully charged condition.  Since the KXBC3is a constant current charger, it will attempt to keep pushing about 200ma into the cells.  Once fully charged, the cells cannot turn the power into the chemical change (charging), so they convert it to heat.  It is normal to see this near the end of the charge cycle in NiMH cells. 

Mark
KE6BB
From: Ralf Wilhelm <ralf at super-deutschland.net>
Sent: ‎Mon, ‎Sep‎ ‎30‎, ‎2013 at ‎5‎:‎36‎ ‎AM
To: Joel Black <w4jbb at charter.net>
CC: elecraft <elecraft at mailman.qth.net>
Subject: Re: [Elecraft] Not 0-40C

Hi Joel,

I have seen the message once while I was charging my eneloop batteries using a 16 h charge. I am not completely sure if the KX3 was on, but I think so. As far as I know, the message occurs when the batteries are getting too warm while charging, don't know if this is said in the KX3 manual or the battery charger manual (but in one of the two). In my case, it took about one hour before the KX3  went back into charging and completed the task.

Greetings

Ralf, DL6OAP

Am 30.09.2013 um 12:12 schrieb Joel Black <w4jbb at charter.net>:

> I got the following message on my KX3 yesterday:
> 
> Not 0-40C
> 
> I was using a 16 hr charge.  At some point during the day, I turned it on, tuned it to 30 m and was just listening.  Later on, I turned the radio off.  That is when I got the message.
> 
> I have not seen this message and don't remember seeing anything about it on the reflector (but that doesn't mean anything with my "CRS").  I also looked in the manual and searched the PDF manual for "40c" and couldn't find anything.
> 
> I disconnected the power supply and the message stayed (yes unplugged from any power source except the internal batteries). After a little while (I don't remember how long), I plugged it back up and it started charging again.
> 
> Has anyone seen this before and knows what it is?
> 
> Thanks.
> 
> 73,
> Joel - W4JBB
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