[Elecraft] Re: Improved Sidetone

[Wayne Burdick]

Martin (et al),

There are many ways to improve the sound of the sidetone, including the new one
posted by TF3MA. 

The way we did it on the revision B K2, which is nearly identical to an earlier
published app note, does not result in any type of "plop" or other audio
artifacts. In our case we used an 82 mH inductor, the same one that we use in
the KAF2. There's also a 47 k resistor involved in the mod. The quality of the
resulting sidetone is excellent.

The schematic of the Revision B Control board can be found in the Revision D K2
Owner's manual, posted on our manual download page.

73,
Wayne
N6KR

Martin wrote:
> 
> Hello all,
> just did the Sidetone-mod suggested by TF3MA.
> The sidetonetone really sounds much better.
> I didn�t have a 2.2uF cap, so I used  3.3uF. The result probably is a
> different low-pass-filter.
> There is a �plop� at the beginning of each dit and dah, will this be
> gone
> as soon as I replace the 3.3uF with 2.2uF?