[Elecraft] K2 problem or is it the antenna?

[Ron D'Eau Claire]

Keith wrote:
Also, the bandwidth of the tuned system has become much narrower.  I used to
get 2:1 bandwidth across most of the 40 meter band.  Two nights ago, I
struggled to get 2:1 over 90 KHz.

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Narrow bandwidth is a sure sign of a reasonably efficient, but physically
small antenna compared to the wavelength. That would cause me to look at
something intermittent in the antenna itself that is disconnecting part of
the radiator. You said it was a ground mounted vertical. Does it have any
traps or other bits beyond a vertical radiator? I'd sure look for a
connection that is opening up, as you mentioned. Possibly even an
intermittent feedline connection to the antenna. 

Ron AC7AC