Scary K2 event this morning!!

[Eddy]

To K2 Wizards et al
 
A scary event this morning involving my 3500+ K2 which was
realigned by Gary a few months ago…..by-the-way, Gary did an outstanding job
and my K2 never has worked better!!


This morning, K2-100 and KAT100 tuner, rig was working FB
Tuesday night, I turned it on from cold start in cold room this morning and the
K2 cooling fan immediately started running…..weird……when I transmitted I
immediately (remember, rig is still cold from sitting overnight) got a PA HOT
error message!!!  The K2 heat sink was
cold to the touch, by-the-way.
WTF!??

Powered off K2, turned back on and same error message.
Next  time, power K2 and 12vdc supply. Powered
back on DC supply, then K2 and got same PA HOT message….now it’s getting scary!

WTF…….I pull off all cabling and run K2 into dummyload.
Power back up and PA HOT error again! Now I’m considering a hardware reset which
I really don’t want to do.

So…….for grins and gigglys this time I turned K2 off, DC
power supply off and removed the 12vdc cable  from back of K2 and voila, when I reconnected DC power, K2 operating
normal again and back on air making 100w thru KAT100 into dummyload and into
dipole.
So, for my K2 wizard friends, any thoughts what happened? I’m
thinking a relay got “suck” in some weird state and took all this to get everything
reset again?

I do appreciate any and all advice y’all can offer.
73
ed
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Hi Ed,
   This has happened to me.  I heat my house with a wood stove and the
radio shack is far away from it.  When the door is closed it can get
quite cold in there.  As Wayne explained to me when my fan started up
on one frosty morning it is because he is from California and knows
little about weather below 0 degrees Centigrade :)  The firmware for
starting the fan depends on the temperature reading.  Just wait until
the room warms up the K2 and it should work just fine.
   73,
      Kevin.  KD5ONS

> To K2 Wizards et al
>  
> A scary event this morning involving my 3500+ K2 which was
> realigned by Gary a few months ago…..by-the-way, Gary did an outstanding
> job
> and my K2 never has worked better!!
>
>
> This morning, K2-100 and KAT100 tuner, rig was working FB
> Tuesday night, I turned it on from cold start in cold room this morning
> and the
> K2 cooling fan immediately started running…..weird……when I
> transmitted I
> immediately (remember, rig is still cold from sitting overnight) got a PA
> HOT
> error message!!!  The K2 heat sink was
> cold to the touch, by-the-way.
> WTF!??
>
> Powered off K2, turned back on and same error message.
> Next  time, power K2 and 12vdc supply. Powered
> back on DC supply, then K2 and got same PA HOT message….now it’s
> getting scary!
>
> WTF…….I pull off all cabling and run K2 into dummyload.
> Power back up and PA HOT error again! Now I’m considering a hardware
> reset which
> I really don’t want to do.
>
> So…….for grins and gigglys this time I turned K2 off, DC
> power supply off and removed the 12vdc cable  from back of K2 and voila,
> when I reconnected DC power, K2 operating
> normal again and back on air making 100w thru KAT100 into dummyload and
> into
> dipole.
> So, for my K2 wizard friends, any thoughts what happened? I’m
> thinking a relay got “suck” in some weird state and took all this to
> get everything
> reset again?
>
> I do appreciate any and all advice y’all can offer.
> 73
> ed
> ______________________________________________________________
> 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

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[Don Wilhelm-4]

Eddy,

If you turned it on when its temperature was below 0 degF, that can happen.
The programmer's "bug-a-boo" of a maximum number of 255 and a minimum of
000 has bitten you.
When the numbers decrease to below 000, the next "lower" number is 255 -
which indicates a really hot K2!  Even if it is not true.
It is not really a big problem and can be solved easily in the menu.
Let it acclimate to the ambient temperature (an hour or so powered off)
- and measure that temperature in degC.
Then enter the K2 menu for TPA and edit the parameter.
Set the parameter to match the temperature in degC and exit the menu
Job done.

In the future, let the K2 warm up above freezing before powering it on
and that will not happen.

73,
Don W3FPR

On 1/15/2014 4:19 PM, Eddy wrote:

> To K2 Wizards et al
>  
> A scary event this morning involving my 3500+ K2 which was
> realigned by Gary a few months ago…..by-the-way, Gary did an outstanding job
> and my K2 never has worked better!!
>
>
> This morning, K2-100 and KAT100 tuner, rig was working FB
> Tuesday night, I turned it on from cold start in cold room this morning and the
> K2 cooling fan immediately started running…..weird……when I transmitted I
> immediately (remember, rig is still cold from sitting overnight) got a PA HOT
> error message!!!  The K2 heat sink was
> cold to the touch, by-the-way.
> WTF!??
>

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

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[Don Wilhelm-4]

Make that 0 degC - not F!
73,
Don W3FPR

Eddy,

If you turned it on when its temperature was below 0 degF, that can happen.
The programmer's "bug-a-boo" of a maximum number of 255 and a minimum of
000 has bitten you.
When the numbers decrease to below 000, the next "lower" number is 255 -
which indicates a really hot K2!  Even if it is not true.
It is not really a big problem and can be solved easily in the menu.
Let it acclimate to the ambient temperature (an hour or so powered off)
- and measure that temperature in degC.
Then enter the K2 menu for TPA and edit the parameter.
Set the parameter to match the temperature in degC and exit the menu
Job done.

In the future, let the K2 warm up above freezing before powering it on
and that will not happen.

73,
Don W3FPR

On 1/15/2014 4:19 PM, Eddy wrote:

> To K2 Wizards et al
>
> A scary event this morning involving my 3500+ K2 which was
> realigned by Gary a few months ago…..by-the-way, Gary did an outstanding job
> and my K2 never has worked better!!
>
>
> This morning, K2-100 and KAT100 tuner, rig was working FB
> Tuesday night, I turned it on from cold start in cold room this morning and the
> K2 cooling fan immediately started running…..weird……when I transmitted I
> immediately (remember, rig is still cold from sitting overnight) got a PA HOT
> error message!!!  The K2 heat sink was
> cold to the touch, by-the-way.
> WTF!??
>

______________________________________________________________
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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