[Elecraft] KX1 TROUBLE ?

[hmmjr]

I recently bought a used KX1 with 4 bands and the ATU.  I put in six AA alkaline batteries and made contacts on each of the 4 bands with about 1.5 watt output on each band.   All seemed to work perfectly. Yesterday I noticed I could no longer run the RF gain wide open.  Doing so greatly reduced the sensitivity. I had to back off on the gain at least one dot to regain normal sensitivity.  Also I noticed a motor boating sound in the receiver which had not been there before. Touching the cabinet or moving the rig into different positions changes the the intensity of this sound.  I thought perhaps battery voltage was too low so I put in a new set. There was no change.  Does anyone have an idea orf what the problem may be?73, Puck W4PM

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