[Elecraft] K2 Ke-Klonk !!

[f5vhp at netcourrier.com]

I recently acquired K2 #0957 (f/w 2.02 , 1.02)
ATU, SSB module, NB module, 160m and Audio Filter modules are fitted.
It makes a loud "Ke-Klonk" at switch on and whenever any of the following buttons are used:
Band =/-
Ant 1/2, TUNE
NB, LEVEL
MODE
Pre / Att
XFil
and, worst of all each time cw transmission is dropped, making semi or full break-in impossible.
The Audio gain control makes no difference.

It makes the same Ke-Klonk when scrolling the menu between "OPT" and "ANT", "RIT" and "ACC" and at every step through the "ANT" sub menu.
Removing the ATU made no difference.
So I'm wondering where to look next ?



William
F5vhp