K3 HI CUR on 20m Only

[Christopher Soames]

Hi, hopefully someone can point me in the right direction to cure the
problem that has manifested itself on my K3.
When I TX using more than 11 Watts on 20metres shows HI CUR on the display.
When I TX using more than 20 Watts on 20 Metres the display shows HI CUR
for a second or two the the rig switches itself off.
I have tried 2 different antennas and a DUMMY load and the results are
always the same.
I have tried both antenna connectors, I have also checked the power
supply and it is feeding 13V into the rig.

I do have the internal antenna tuner fitted, When I tune on 20 metres I
do not  get the SWR reading at the top of the display. All I get is --
at the top and 5.0 W at the bottom with reference to tuning.

With the internal ATU bypassed I get exactly the same problem on 20 only
HI CUR and switches off.

All other Bands at all power levels are fine, the problem is 20metres only.

Where to look?

Help!!!

Chris G0TZZ



______________________________________________________________
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]

[Oliver Dröse]

Chris,

do the TX gain calibration per manual (easiest using the K3 Utility) and
problem should hopefully be gone (just had a similar problem with a
friend's K3). GL!

73, Olli - DH8BQA

Contest, DX & radio projects: http://www.dh8bqa.de


Am 31.07.2015 um 22:15 schrieb Chris Soames:

> Hi, hopefully someone can point me in the right direction to cure the
> problem that has manifested itself on my K3.
> When I TX using more than 11 Watts on 20metres shows HI CUR on the
> display.
> When I TX using more than 20 Watts on 20 Metres the display shows HI
> CUR for a second or two the the rig switches itself off.
> I have tried 2 different antennas and a DUMMY load and the results are
> always the same.
> I have tried both antenna connectors, I have also checked the power
> supply and it is feeding 13V into the rig.
>
> I do have the internal antenna tuner fitted, When I tune on 20 metres
> I do not  get the SWR reading at the top of the display. All I get is
> -- at the top and 5.0 W at the bottom with reference to tuning.
>
> With the internal ATU bypassed I get exactly the same problem on 20
> only HI CUR and switches off.
>
> All other Bands at all power levels are fine, the problem is 20metres
> only.
>
> Where to look?
>
> Help!!!
>
> Chris G0TZZ
>
>
>
> ______________________________________________________________
> 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]