Terry,
What is the MCU firmware level? You can check that by holding any
button while powering the K2.
If the level is not 2.04R, then the sidetone source is select-able in
the menu.
I suggest you turn the STL level down to about 30 or so to protect your
ears. Then when in the sidetone menu, tap the DISPLAY button to change
between U6-25 and U8-4. Exit the menu when you hear sidetone.
Your sidetone source must be U8-4 since the KPA100 is installed.
Upgrading the 2.04R firmware will cure it for all time.
73,
Don W3FPR
On 6/29/2025 5:05 PM, Terry via Elecraft wrote:
Hello All,
Our Ham Club had a K2-100 donated to the club. At field day, I was going to
use it to make some CW contacts. When I keydown the Key, CW is being sent,
but the speaker goes silent and no audible CW tones are being transmitted.
I have the St L cranked up to 165. Regardless of the ST L setting, there is
no audible CW being heard. It is sending at power. Everything seems to
work except that.
I would appreciate anyone giving me advice on what might be wrong.
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