[Elecraft] Strange K3 & KPA500 Issues fixed with a longer coax cable?

[Richard - HB9ANM]

Well, this is surprising, to say the least. Inasmuch as it seems to have 
happened in several places. I normally don't post remarks of the 
"no-problem-here" sort but I don't think this has anything to do with 
RFI or inductance. Neither are ferrite chokes likely to solve the 
problem. My K3->KPA500 cable is only 65 cm (26") long (the only piece of 
RG58 in my setup) but nobody mentioned any distortion.

BTW: Both the K3 AND the KPA500 are earthed (grounded, if you prefer) 
separately to a common earth... I mean: grounding point, as well as the 
(manual) tuner, the SteppIR controller, etc.

If a longer cable can solve the problem, it's OK but the main question 
(the "WHY?") remains unanswered... Strange, indeed.

73
Richard - HB9ANM