[Elecraft] K2 Sidetone Problem

[Don Wilhelm]

Larry,

Version 2.04p firmware does have the sidetone source toggle, so it 
should work.  Are you really tapping the DISPLAY button or are you 
really pressing it (a HOLD operation).

If all else fails, go to the KIO2 or KPA100 manual (download them from 
the Electrtft website), and make the Control Board wiring change - it 
consists of one cut and two added wires (plus a .001 uF capacitor) - not 
really a lot ot it.  The U8-4 sidetone source is more reliable than the 
U6-25 and several of us who deal with K2 support and repair situations 
have been lobbying Wayne to eliminate the selection and glue it to the 
U8-4 source, which would require that owners of K2s below SN 3000 would 
have to make the wiring change if new firmware is installed.

73,
Don W3FPR

gearjam wrote:
> I have upgraded my firmware to the latest revision. (and replaced the I/O controller). The sidetone is gone. There is no option to change the source, it stays on U8-4 when I tap the display button.
> When I put the old IC back, the sidetone returns. My K2 is an older (1644) rig and I don't have the 100 watt option or the the KIO2 option installed. Does anyone have any ideas?
>
> Thanks, Larry
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