Hi Gary,
Thanks for your interest. I am quite aware that the gurus at Elecraft are extremely busy and need evidence that firmware changes are beneficial. That is why I asked that those with the KRX3 should try my method and report their findings. This method is only good for evaluation but you don't want to tie up the KRX3 with it. The brain seems quite happy with a large chunk of bandwidth missing. We are not talking Hi-Fi but intelligibility. Try it and make your own decision. The K3 has a great CW receiver but SSB improvements seem to be on the back burner.

73
        Tony VE3QF


Gary Hvizdak wrote:
Hi Tony,

This sounds very cool and your approach most ingenious. However, it is likely that Wayne and/or Lyle would want sufficient evidence regarding the value of this sort of notch filtering, before expending the effort to implement it in firmware. In the mean time, your dual RX approach using the sub-receiver should provide you with a useable workaround method to accomplish such a notch.


    BTW, I just did a quick search online and found the following link …


http://basic-programming.blogspot.com/2005/10/speech-recognition-formants-for-vowels.html

… which implies that there is no such gap in the spectrum “for all vowel sounds”.

73,

Gary  KI4GGX

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