Elecraft

Not 0-40C

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W4JBB

Not 0-40C

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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Mark Bayern

Re: Not 0-40C

I'm just guessing but it sounds like a temperature limit.

Mark. AD5SS
On Sep 30, 2013 5:13 AM, "Joel Black" <[hidden email]> wrote:

> 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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> Post: mailto:[hidden email].**net <[hidden email]>
>
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> Please help support this email list: http://www.qsl.net/donate.html
>

DL6OAP

Re: Not 0-40C

In reply to this post by W4JBB

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 <[hidden email]>:

> 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
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html

KE6BB

Re: Not 0-40C

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 <[hidden email]>
Sent: ‎Mon, ‎Sep‎ ‎30‎, ‎2013 at ‎5‎:‎36‎ ‎AM
To: Joel Black <[hidden email]>
CC: elecraft <[hidden email]>
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 <[hidden email]>:

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KE6BB

Re: Not 0-40C

In reply to this post by W4JBB

Your NiMH cells are at or almost fully charged. Near the end of the charge cycle, the NiMH cells convert more and more of the charge current to heat, and less to chemical conversion (charging). When the cells reach 40deg. C, the KXBC3 suspends charging until the cell temperatures drop below 40 deg. C. It will continue the charge cycle at that time. This is all normal.

Reference "Elecraft KXBC3 Installation and Operation Rev A2", page 4.

Mark
KE6BB
From: Joel Black <[hidden email]>
Sent: ‎Mon, ‎Sep‎ ‎30‎, ‎2013 at ‎4‎:‎11‎ ‎PM
To: elecraft <[hidden email]>
Subject: [Elecraft] Not 0-40C

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
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

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Please help support this email list: http://www.qsl.net/donate.html
______________________________________________________________
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Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

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W4JBB

Re: Not 0-40C

In reply to this post by W4JBB

Thanks for all the help with this.

I had figured it was some kind of temp issue, but I had no idea what it
involved.

I looked through the KX3 manual and I thought I looked through the KBC3
manual and couldn't find it. Apparently I just missed it.

Thanks again.

73,
Joel - W4JBB

On 9/30/13 5:12 AM, Joel Black wrote:

> 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
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>

KE6BB

Re: Not 0-40C

In reply to this post by KE6BB

Wow! I sent this message around 11:00pm PDT last night and it made it to the list 9 hours later. May be my fault, though. I didn't check my outbox to be sure it actually went out before I shut down last night.

Mark
KE6BB
From: Mark Petiford <[hidden email]>
Sent: ‎Tue, ‎Oct‎ ‎1‎, ‎2013 at ‎8‎:‎01‎ ‎AM
To: Joel Black <[hidden email]>; elecraft <[hidden email]>
Subject: Re: [Elecraft] Not 0-40C

Your NiMH cells are at or almost fully charged. Near the end of the charge cycle, the NiMH cells convert more and more of the charge current to heat, and less to chemical conversion (charging). When the cells reach 40deg. C, the KXBC3 suspends charging until the cell temperatures drop below 40 deg. C. It will continue the charge cycle at that time. This is all normal.

Reference "Elecraft KXBC3 Installation and Operation Rev A2", page 4.

Mark
KE6BB
From: Joel Black <[hidden email]>
Sent: ‎Mon, ‎Sep‎ ‎30‎, ‎2013 at ‎4‎:‎11‎ ‎PM
To: elecraft <[hidden email]>
Subject: [Elecraft] Not 0-40C

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
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

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Please help support this email list: http://www.qsl.net/donate.html
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Help: http://mailman.qth.net/mmfaq.htm
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______________________________________________________________
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Post: mailto:[hidden email]

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KE6BB

Re: Not 0-40C

In reply to this post by W4JBB

Re: "...it would be nice to have the battery charger info integrated into the main manual..."

Good idea, Walter.

I think that is the main cause of confusion and the source of the questions on this list and the Yahoo group. The factory built folks probably never look at the installation instructions for the battery charger, so they can't find an explanation. Even the kit builders may not notice the very short explanation in the charger installation manual since it is buried in there. When we get an error message, most of us grab the KX3 owners manual and turn to the error code matrix near the back. It isn't in that matrix, though.

Mark
KE6BB
From: Walter Underwood <[hidden email]>
Sent: ‎Tue, ‎Oct‎ ‎1‎, ‎2013 at ‎7‎:‎56‎ ‎AM
To: Elecraft Reflector <[hidden email]>
Subject: Re: [Elecraft] Not 0-40C

The error message could be better, too. I was mystified and I know about the temp sensor in the battery charger
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Lynn W. Taylor, WB6UUT

Re: Not 0-40C

In reply to this post by W4JBB

I would suggest "BAT TEMP" as being about the same length and more
descriptive.

Sure, it's not as informative (it doesn't tell you what the BAT TEMP
should be) but it's probably enough to send you to the right documentation.

On 10/1/2013 7:45 AM, Walter Underwood wrote:
> The error message could be better, too. I was mystified and I know about the temp sensor in the battery charger.

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