[Elecraft] K3 shuts off

[Jim Wiley]

Could be the power supply.  Some regulated supplies shut down completely 
if the overcurrent protection trips, and they have to be completely shut 
down to reset them.  Clue: is anything else connected to the supply, and 
if so, does it shut down t the same time as the K3?  If so, then it's a 
power supply problem not a K3 problem.  However, if not that, then  (if 
the rig is connected to an antenna when this happens) it may be RF 
getting back into the rig or the power supply and and affecting the 
control circuits in either one.

What happens if you try the test at lower power - say 60 watts?   Do you 
have access to another power supply, even temporarily?  If so, try that 
and see what happens.  Depending on the band in use, the K3 might well 
exceed 20A current draw and shut down the PS. A 25A or even a 30A PS 
would probably be  a better choice.


- Jim, KL7CC



> Mike wrote:
>   
>> I was at a friends today, looking at his K3. It's in the 1000 range of 
>> serial numbers, not a kit.
>>
>> If power is set above 95-96 watts, the rig shuts down instantly when you 
>> transmit (at least in CW and if you press the TUNE button. Didn't try it 
>> on any other modes).
>>
>> His power supply reads 14.6V, it's a 20A supply, but we didn't read it 
>> under load. Does the K3 have the ability to display voltage and current 
>> draw?
>>
>> I downloaded and installed 3.68 firmware, but the problem was there before.
>>
>> Clues and hints, please?
>>     
>
>