[Elecraft] K2 KPA100 tests

[Don Wilhelm]

  Mike,

Remember that the Hi Cur messages are from the base K2.  They can be 
caused by difficulty in driving the KPA100, or a problem with the KPA100 
low pass filter or the wattmeter.  Check the wattmeter calibration first.
If the wattmeter is good, then disconnect the power from the KPA100 and 
power the base K2 through the coaxial power jack.  See if the K2 still 
gives a HiCur message at 10 watts - if not, try 12 watts, and then try 
15 watts.

If the HiCur messages persist, then remove the KPA100 (physically) and 
do the same test with the base K2 only.
If the messages go away in that configuration, look carefully at the 
KPA100 low pass filter (an extra turn on the toroids is a common 
problem) - but if they persist with only the base K2, you have either a 
problem with the Low Pass Filter, or T4, or a problem with the PA 
transistors in the base K2.

73,
Don W3FPR

On 11/25/2010 10:28 AM, VE3WDM wrote:
> Good morning again Don,
> On my board L16 is blue and the kit was purchased about a year ago maybe
> less. I'm not at home right now so I can't check the receipt. I also have
> the KDSP2 unit installed as well. Getting back to the Hi Cur I am going to
> this weekend setup the K2 so the LP 100A and dummy load are the only pieces
> of equipment that are connected when I do the power readings. At this time
> there are some LDG antenna switches and extra coax as well.
> Mike
> VE3WDM