Tom,
The sidetone is generated by the MCU along with help from Control Board U8.
I suspect that you have the wrong sidetone source selected.
Go to the ST L menu and edit the menu parameter - set the level to
something decent, like 40.
Then tap DISPLAY to change the sidetone source - it is a toggle. Stop
when you hear sidetone and tap MENU twice to exit the menu.
73,
Don W3FPR
On 8/5/2015 12:09 AM, Tom Field wrote:
My K2, recently aligned and tuned up with the help of Don Wilhelm, lost the CW
side tone. It clicks when you close the key, and there is no SPOT tone or if
you try to change the tone volume in the menu there is no sound.
As a guess, I may have had a short in the key plug, where to start looking? I
couldn’t see the audio oscillator in the schematic.
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