[Elecraft] My K2/100 keeps resetting at high power

[Don Wilhelm]

Hisashi,

If by "reset" you mean the power turns off, you are most likely seeing 
the internal resettable fuse trip.
Normally you would see a HiCur message too.
Usual causes for that behavior are either that the KPA100 wattmeter 
diodes have been damaged or you have a damaged PA transistor in the base K2.

Check the actual output power --
Connect an external wattmeter between the KPA100 and a dummy load then 
set the K2 power knob to about 30 watts.  set to CW and hold the key 
down long enough to read the external wattmeter.  If it shows full power 
output (greater than 100 watts), you have a problem with the wattmeter 
in the KPA100 - most likely bad diodes at D16 and D17.

73,
Don W3FPR


On 4/2/2012 11:37 AM, Hisashi T Fujinaka wrote:
> OK, it's S/N 4355 with all the latest mods and it used to just reset
> when I got on 15M phone. Now it's resetting on 30M CW while I'm trying
> to work DX so it's bugging me. :)
>
> Besides the standard checking for 10-year-old cold solder joints, is
> there anything else to check right away?
>