[Elecraft] K2 Sidetone Problem

[Jim Scott, AD5YU]

It's fixed now - thanks to Mike Short and John, K7UP for their quick response.

It was indeed the side tone source parameter accessed from the edit mode secondary menu under the ST-L menu. 

I have not idea how this got messed up - but I was using Ham Radio Deluxe remotely recently, and I suspect somehow I accidentally changed this parameter. 

Thanks again everyone.

Jim Scott