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

[Yoshida Akira]

Hi all

Maybe my problem looks solved. Referring to suggestions I checked all 
coax cables.
I found a cable with bad poor contact at both end plugs. K3 see very 
high SWR instantaneously
and it shout down.
I have not seen the problem for several hours since bad cable was replaced.

Thanks again for suggestions.

73


On 2020/06/10 7:15, Yoshida Akira wrote:
> Hi all
>
> Thanks for more suggestions, however I am not happy.
> I noticed this a several times yesterday when transmitting FT8 with 50W.
>
> I checked DX cable and connectors. It looks OK. I look at voltage, 
> current and PA Temp
> with internal meter. I do not notice any significant jump just before 
> shut down.
>
> It is better for me to send K3/100 to JA dealer who checked 
> everything, sometimes
> replaced parts before.
>
> BTW: my K3/100 s/n 00060  arrived on 2007/12   I still like this radio 
> best.
>
> Thanks
>
> 73
>
>
> On 2020/06/09 11:33, Yoshida Akira 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