I use 420 Hz +/- these days when DXing. With 40 year younger ears I used to use
500-600 Hz on MS and EME.
On 3/13/2021 11:50 AM, Sverre Holm (LA3ZA) wrote:
Wayne.
A CW sidetone pitch of 400 Hz is consistent with what little research there
is on this. A paper from 1992 stated that "All subjects improved their
recognition as the frequency was lowered to 500 Hz, some even at 250 Hz."
See
https://la3za.blogspot.com/2013/10/studies-on-morse-code-recognition.html
-----
Sverre, LA3ZA
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