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K3 HI-TEMP ALARM

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JE1TRV

K3 HI-TEMP ALARM

Hi Elecrafters!

I have problem on my K3/100 (S/N3050, factory assembled).
When I transmit more than 12W(means hi power amp on)
within about 30min after mains power on, HI-TEMP alarm
occur and equipment is forced to set 5W.

No problem at all when hi-power amp is through ( Po<12W ).

Any idea?
Thanks in advance
73, Atsu JE1TRV
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Thomas Norff

Re: K3 HI-TEMP ALARM

Atsu,

did you check the fans ?
--------
Connect a power supply to your K3 and test the fans and KPAIO3 interface
control as follows:
- Press the POWER button to turn the K3 on.
- Hold CONFIG to select the Configuration menu, then turn VFO B to KPA3.
Normally, the display will
indicate NOT INST (not installed).
- Turn the VFO A knob to PAIO ON, then turn it further to PAIO TST. When
moving between ON and
TST, you should hear a relay click on the KPAIO3 board. If you don't,
press the K3 POWER button to
switch it off, then on again and retry the test.
- Turn the VFO A knob on past TST to FN1, then FN2, FN3 and FN4. The
fans should start turning at
FN1 and increase speed as you continue to FN4.
Turn the K3 off and disconnect the power supply.
-------

73 de Thomas, DM7TN

-----Original Message-----
From: [hidden email]
[mailto:[hidden email]] On Behalf Of JE1TRV
Sent: Sunday, January 10, 2010 3:14 PM
To: [hidden email]
Subject: [Elecraft] K3 HI-TEMP ALARM

Hi Elecrafters!

I have problem on my K3/100 (S/N3050, factory assembled).
When I transmit more than 12W(means hi power amp on) within about 30min
after mains power on, HI-TEMP alarm occur and equipment is forced to set 5W.

No problem at all when hi-power amp is through ( Po<12W ).

Any idea?
Thanks in advance
73, Atsu JE1TRV
______________________________________________________________
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OH1MA

Re: K3 HI-TEMP ALARM

In reply to this post by JE1TRV

Hi

I have same problem, when shack temperature is below 17 degrees Celcius

When PA Temp is higher than 25 degrees C then power is OK.

Jaakko OH1MA / K3 ser. 2952

Hi Elecrafters!

I have problem on my K3/100 (S/N3050, factory assembled).
When I transmit more than 12W(means hi power amp on)
within about 30min after mains power on, HI-TEMP alarm
occur and equipment is forced to set 5W.

No problem at all when hi-power amp is through ( Po<12W ).

Any idea?
Thanks in advance
73, Atsu JE1TRV

______________________________________________________________
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Don Wilhelm-4

Re: K3 HI-TEMP ALARM

In reply to this post by JE1TRV

Atsu,

Try re-calibrating the PA Temperature Sensor as described in the manual.
Also make certain both fans are turning.

73,
Don w3FPR

JE1TRV wrote:

> Hi Elecrafters!
>
> I have problem on my K3/100 (S/N3050, factory assembled).
> When I transmit more than 12W(means hi power amp on)
> within about 30min after mains power on, HI-TEMP alarm
> occur and equipment is forced to set 5W.
>
> No problem at all when hi-power amp is through ( Po<12W ).
>
> Any idea?
> Thanks in advance
> 73, Atsu JE1TRV
>
>

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JE1TRV

Re: K3 HI-TEMP ALARM

In reply to this post by OH1MA

Hi folks!
Thank you for suggestions.

In my previous post, I forgot to say that my K3 works without hi-temp
alarm after warming up (about 30min or so without transmit just receiving
status).

So, it's just the same with Jaako's case.
My shack temp was around 15C these days.

hmmm...

Atsu, JE1TRV

> Hi
>
> I have same problem, when shack temperature is below 17 degrees Celcius
>
> When PA Temp is higher than 25 degrees C then power is OK.
>
> Jaakko OH1MA / K3 ser. 2952
>
>
> Hi Elecrafters!
>
> I have problem on my K3/100 (S/N3050, factory assembled).
> When I transmit more than 12W(means hi power amp on)
> within about 30min after mains power on, HI-TEMP alarm
> occur and equipment is forced to set 5W.
>
> No problem at all when hi-power amp is through ( Po<12W ).
>
> Any idea?
> Thanks in advance
> 73, Atsu JE1TRV
>
>

Guy, K2AV

Re: K3 HI-TEMP ALARM

In my experience with this, the five watt calibration of the K3 was
incorrect. The gain required to set the fifty watt cal was then
incorrect. This can cause various problems, including burning out the
low power amp, and not getting 100 watts out when 50 is calibrated.

Note that a Bird wattmeter with a 250 watt slug is NOT sufficiently
accurate at 5 watt levels.

On Mon, Jan 11, 2010 at 10:20 PM, <[hidden email]> wrote:

> Hi folks!
> Thank you for suggestions.
>
> In my previous post, I forgot to say that my K3 works without hi-temp
> alarm after warming up (about 30min or so without transmit just receiving
> status).
>
> So, it's just the same with Jaako's case.
> My shack temp was around 15C these days.
>
> hmmm...
>
> Atsu, JE1TRV
>
>> Hi
>>
>> I have same problem, when shack temperature is below 17 degrees Celcius
>>
>> When PA Temp is higher than 25 degrees C then power is OK.
>>
>> Jaakko OH1MA / K3 ser. 2952
>>
>>
>> Hi Elecrafters!
>>
>> I have problem on my K3/100 (S/N3050, factory assembled).
>> When I transmit more than 12W(means hi power amp on)
>> within about 30min after mains power on, HI-TEMP alarm
>> occur and equipment is forced to set 5W.
>>
>> No problem at all when hi-power amp is through ( Po<12W ).
>>
>> Any idea?
>> Thanks in advance
>> 73, Atsu JE1TRV
>>
>>
>
> ______________________________________________________________
> 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
>

wayne burdick

Re: K3 HI-TEMP ALARM

Administrator

In reply to this post by JE1TRV

We're looking into this.

73,
Wayne
N6KR

On Jan 11, 2010, at 7:20 PM, [hidden email] wrote:

> Hi folks!
> Thank you for suggestions.
>
> In my previous post, I forgot to say that my K3 works without hi-temp
> alarm after warming up (about 30min or so without transmit just
> receiving
> status).
>
> So, it's just the same with Jaako's case.
> My shack temp was around 15C these days.
>
> hmmm...
>
> Atsu, JE1TRV
>
>> Hi
>>
>> I have same problem, when shack temperature is below 17 degrees
>> Celcius
>>
>> When PA Temp is higher than 25 degrees C then power is OK.
>>
>> Jaakko OH1MA / K3 ser. 2952
>>
>>
>> Hi Elecrafters!
>>
>> I have problem on my K3/100 (S/N3050, factory assembled).
>> When I transmit more than 12W(means hi power amp on)
>> within about 30min after mains power on, HI-TEMP alarm
>> occur and equipment is forced to set 5W.
>>
>> No problem at all when hi-power amp is through ( Po<12W ).
>>
>> Any idea?
>> Thanks in advance
>> 73, Atsu JE1TRV
>>
>>
>
> ______________________________________________________________
> 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

JE1TRV

Re: K3 HI-TEMP ALARM

Wayne & Gary,
Thanks for the support off the list.
After I set PA TEMP to "R ONLY" instead of "T AND R",
the problem stopped.
I don't know the reason why. But anyway it seems usable
with this setting for the time being.

Jaakko,
Please try this setting on your K3 too.

TU & 73
Atsu, JE1TRV

----- Original Message -----
From: "Wayne Burdick" <[hidden email]>
To: <[hidden email]>
Cc: <[hidden email]>
Sent: Wednesday, January 13, 2010 1:36 AM
Subject: Re: [Elecraft] K3 HI-TEMP ALARM

> We're looking into this.
>
> 73,
> Wayne
> N6KR
>
> On Jan 11, 2010, at 7:20 PM, [hidden email] wrote:
>
>> Hi folks!
>> Thank you for suggestions.
>>
>> In my previous post, I forgot to say that my K3 works without hi-temp
>> alarm after warming up (about 30min or so without transmit just
>> receiving
>> status).
>>
>> So, it's just the same with Jaako's case.
>> My shack temp was around 15C these days.
>>
>> hmmm...
>>
>> Atsu, JE1TRV
>>
>>> Hi
>>>
>>> I have same problem, when shack temperature is below 17 degrees
>>> Celcius
>>>
>>> When PA Temp is higher than 25 degrees C then power is OK.
>>>
>>> Jaakko OH1MA / K3 ser. 2952
>>>
>>>
>>> Hi Elecrafters!
>>>
>>> I have problem on my K3/100 (S/N3050, factory assembled).
>>> When I transmit more than 12W(means hi power amp on)
>>> within about 30min after mains power on, HI-TEMP alarm
>>> occur and equipment is forced to set 5W.
>>>
>>> No problem at all when hi-power amp is through ( Po<12W ).
>>>
>>> Any idea?
>>> Thanks in advance
>>> 73, Atsu JE1TRV