[Elecraft] K3 Apparent PA failure ?

[Martin Sole]

Hi,

I see about 1.17A in receive and only 1.8A in TX TUNE mode with the the 
PWR control set at 110W.

Martin, HS0ZED


On 10/04/2018 07:38, Al Lorona wrote:
> Martin,
>
> Does the K3 draw any current from the power supply when you go into 
> TUNE? If so, then maybe the power meter is bad.
>
> If not, then there is something wrong in the DC power to the amplifier 
> stages.
>
> Al  W6LX
>
>
> ------------------------------------------------------------------------
> *From:* Martin Sole <hs0zed at gmail.com>
> *To:* elecraft at mailman.qth.net
> *Sent:* Monday, April 9, 2018 5:36 PM
> *Subject:* Re: [Elecraft] K3 Apparent PA failure ?
>
> Hi,
>
> Well I've been through all of the operational settings. CONFIG : TUN PWR
> is set to NOR and I can vary the power with the power control but the
> output meter display stays at 0.0 and the VSWR displays only - - . I had
> a settings save from about a month ago but uploading that hasn't changed
> anything.
>
> Since this affects both the 100 watt PA and the LPA I'm guessing the 100
> watt PA is probably good and that the failure must be earlier on.
>
> My next test is to look at the XVTR output as I see that is taken off
> before both amplifiers to see if there is anything there.
>
> Martin, HS0ZED
>
>
> >> Hi,
> >>
> >> My K3 died today, somehow. The radio works fine on receive and
> >> appears to transmit just there is no power indication on my external
> >> meter or on the front panel when pressing TUNE. There is ALC
> >> indication but no power out indication.The only thing I did different
> >> was to switch off the supply before the radio, something I normally
> >> never do. Having noted others having issues with that I reloaded the
> >> firmware. Still no output. Starting to think that somehow the PA is
> >> fried or possibly the driver as there is nothing from the 10 watt PA
> >> either. Tried turning the power down and putting the KPA3 into
> >> bypass. Still no power output. Not sure what else to try before I
> >> tear into it. Was going great, worked 3B7A on 3 bands today no problem.
> >>
> >> Suggestions appreciated.
> >>
> >> Thanks
> >> Martin, HS0ZED
> >>
> >> ______________________________________________________________
> >> Elecraft mailing list
> >> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> >> Help: http://mailman.qth.net/mmfaq.htm
> >> Post: mailto:Elecraft at mailman.qth.net <mailto:Elecraft at mailman.qth.net>
> >>
> >> This list hosted by: http://www.qsl.net <http://www.qsl.net/>
> >> Please help support this email list: http://www.qsl.net/donate.html
> >> Message delivered to dave at nk7z.net <mailto:dave at nk7z.net>
> > ______________________________________________________________
> > Elecraft mailing list
> > Home: http://mailman.qth.net/mailman/listinfo/elecraft
> > Help: http://mailman.qth.net/mmfaq.htm
> > Post: mailto:Elecraft at mailman.qth.net <mailto:Elecraft at mailman.qth.net>
> >
> > This list hosted by: http://www.qsl.net <http://www.qsl.net/>
> > Please help support this email list: http://www.qsl.net/donate.html
> > Message delivered to hs0zed at gmail.com <mailto:hs0zed at gmail.com>
>
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft at mailman.qth.net <mailto:Elecraft at mailman.qth.net>
>
> This list hosted by: http://www.qsl.net <http://www.qsl.net/>
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to alorona at sbcglobal.net <mailto:alorona at sbcglobal.net>
>
>