[Elecraft] K3/100 suddenly shut down on FT8 TX

[Gwen Patton]

IT sounds like you're having a problem with the radio overheating and
shutting down. FT8 and other digital modes like it have VERY long duty
cycles, so the radio gets hot very fast. If the cooling can't keep up, the
radio shuts down to protect itself. Reduce your RF power and see if it
helps. If this hasn't happened for a long time, maybe you have a bad fan,
or maybe you need to clean the radio. It might have a lot of dust keeping
the fans from cooling it properly, just like a computer. I have to clean my
computer regularly, to get the cat hair out of it so it doesn't overheat!

I hope this helps!  ごきげんよう！

-=-=-=-=-=-=-=-=-
73,
Gwen, NG3P


On Mon, Jun 8, 2020 at 11:01 PM Yoshida Akira <ja1nlx0205 at my.email.ne.jp>
wrote:

> Bob
>
> When transmitting FT8, it suddenly shut down (power OFF) Of course I do
> not touch
> any button. It looks as if I push Power button.
>
> After a while I push Power button and it turns power ON.  Maybe Power
> button problem ???
>
> 73
>
> On 2020/06/09 11:42, Bob McGraw K4TAX wrote:
> > I’m curious.  When transmitting, why would one press the POWER button on
> the radio other than to turn the radio off?
> >
> > Something I am missing here.
> >
> > Bob, K4TAX
> >
> >
> > Sent from my iPhone
> >
> >> On Jun 8, 2020, at 9:34 PM, Yoshida Akira <ja1nlx0205 at my.email.ne.jp>
> wrote:
> >>
> >> Hi all
> >>
> >> Thanks for suggestions. All look OK to me.
> >>
> >> Power supply is Powerwerx ss-30DV. I do not use Powerpole connector
> >> in the front panel, instead use terminal in the back panel.
> >>
> >> I use this power supply for another TRX also and have never noticed the
> problem.
> >>
> >> 73
> >>
> >>> On 2020/06/09 9:00, Yoshida Akira wrote:
> >>> Hi all
> >>>
> >>> I have never seen this for many years, however I recently noticed twice
> >>> when transmitting FT8 with 100W. No alarm and error message.
> >>> When I simply push POWER button in front panel then it turns ON again.
> >>>
> >>> PA temp, DC voltage and DC current looks good. I do not believe RFI
> >>> cause this problem.
> >>>
> >>> Any idea ?
> >>>
> >> --
> >> 73 de aki
> >> JA1NLX
> >> ______________________________________________________________
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> --
> 73 de aki
> JA1NLX
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