K-3 goes into bypass

[MICHAEL SMITH]

This condition has been seen on my K-3 when operating on 6 meters in FT8 mode.  The K-3 will run for about 45-60 minutes in continuous contact mode, then all of a sudden will shutdown and only transmit 5 watts to the KPA500 amp.    The PA temp menu shows the amp at 35 degrees C.  The FT8 mode uses 15 second transmissions and cycles 4-5 times in 2 minutes.  Normal PA temp is 25 degrees C before transmitting.


Is anyone else having this issue with the K-3?  Serial number of this K-3 is 5192.


Baldeagle535
______________________________________________________________
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
Message delivered to [hidden email]

[w0mu]

What power supply are you using for the K3?  Have you checked it.  I was
using a Powerwerx and the fan had pretty much stopped working and with
FT8 it was getting quite hot after a while it would shut down the K3 and
I saw some other odd things.  It took me a while to find the power
supply problem.  Bought a new fan and everything is fine.

W0MU


On 7/24/2018 2:55 PM, MICHAEL SMITH wrote:

> This condition has been seen on my K-3 when operating on 6 meters in FT8 mode.  The K-3 will run for about 45-60 minutes in continuous contact mode, then all of a sudden will shutdown and only transmit 5 watts to the KPA500 amp.    The PA temp menu shows the amp at 35 degrees C.  The FT8 mode uses 15 second transmissions and cycles 4-5 times in 2 minutes.  Normal PA temp is 25 degrees C before transmitting.
>
>
> Is anyone else having this issue with the K-3?  Serial number of this K-3 is 5192.
>
>
> Baldeagle535
> ______________________________________________________________
> 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
> Message delivered to [hidden email]

______________________________________________________________
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
Message delivered to [hidden email]

[Bob McGraw - K4TAX]

As I recall, there were some original issues with the connector pins
associated with the KPA-3 PA amp.    I recall these were later changed
to gold plated pins.   Your description seems to indicate the KPA-3 100
watt amp is dropping off line, leaving only the 10 watt driver stage on
line.

73

Bob, K4TAX



On 7/24/2018 3:55 PM, MICHAEL SMITH wrote:

> This condition has been seen on my K-3 when operating on 6 meters in FT8 mode.  The K-3 will run for about 45-60 minutes in continuous contact mode, then all of a sudden will shutdown and only transmit 5 watts to the KPA500 amp.    The PA temp menu shows the amp at 35 degrees C.  The FT8 mode uses 15 second transmissions and cycles 4-5 times in 2 minutes.  Normal PA temp is 25 degrees C before transmitting.
>
>
> Is anyone else having this issue with the K-3?  Serial number of this K-3 is 5192.
>
>
> Baldeagle535
> ______________________________________________________________
> 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
> Message delivered to [hidden email]
>

______________________________________________________________
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
Message delivered to [hidden email]