K2 Sidetone gone

[Tom Field]

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.

Tom
KN6DR
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [hidden email]

[vk2rq]

Check the ST L (ie. sidetone source) menu item setting.

73, Matt VK2RQ




On Tue, Aug 4, 2015 at 9:10 PM -0700, "Tom Field" <[hidden email]> 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.

Tom
KN6DR
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [hidden email]
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [hidden email]

[Don Wilhelm-4]

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.
>
>

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [hidden email]