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? Martin