Yesterday I opened up my K2, S/N 2549, to replace D10...When I unplugged the coaxial DC power connector, it was a little cruddy so I wiped it with a clean cloth...I noticed that the outer sleeve of the connector, which is the negative leg from the power supply, spun easily...This means that it was not making good electrical contact with the negative solder lug inside the backshell of the connector...This was a replacement Radio Shack connector..The original Elecraft connector, which is at another location in my QTH, does not have this fault...It probable accounted for a few MV of drop which was why I was replacing D10...I was able to solder the sleeve to the ground lug, but a new connector is in order...If anyone has replaced their connector with one from RS, it might be a good idea to check it out...
Jerry, wa2dkg
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