[Elecraft] K2 Audio Thumping & Shutdown Noise

[K4GDR]

I have two audio issues with the K2 that I would appreciate help with:

1. During CW keying I hear a "thumping" sound in the sidetone.  Per
suggestion from Elecraft Support, I grounded the microphone jack to the
Front Panel Board but it did not help.  I tested into a 50 ohm dummy load to
be sure "thumping" was not due to mismatched antenna.  This also did not
change the "thumping" sound.

2. The other audio issue is a loud "crashing" sound in the speaker when I
shut the rig off.  It sounds like a loose speaker connection -- a very loud,
scratchy noise as the radio shuts down.

I noticed these issues prior to installation of any options.  I have since
added the 160, 60 meter, ATU, KIO2 options; noises unchanged after
installation.

Other than these two issues, the K2 works great.  Suggestions welcome!

Regards,
Bill K4GDR





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