[Elecraft] copying CW QRQ

[Indy]

>To put it another way, the only time you can distinguish a hard from a=20
>soft signal is when it is loud and you are using low selectivity.  And=20
>in this case there isn't a problem with readability (unless the code=20
>speed is high enough to start to run the elements together, which we've =

>seen MAY POSSIBLY occur above 60 wpm).
>=20
>73,
>Vic, K2VCO

Cw becomes difficult to copy at high speeds because of the Haas Effect.  =
The ear can hear the dits at high speeds, but the brain (in 90% of =
people) interprets it as an echo when durations get short.  Most people =
will mush out by 60 wpm some as early as 40.  those who can copy above =
these speeds actually have abnormal brain response to hearing. =20

You can beat this by tuning to a pitch above 1,500 cycles where the echo =
suppressor is inactive.  I have done this myself and found 75 wpm board =
sent Cw materialized in my mind (what there is of it) like someone =
speaking, but the piercing shreak was so unpleasant that I didn't bother =
for long!  That old military op who thought he was copying clix was =
actually copying at a high enough tone to dodge the echo-suppressor.

73

Fred
KT5X
CFO #256

P.S. Military ops were taught to copy code differently.  They frequently =
typed the message, but had to read it afterward to know what was sent.  =
They were copying with the spinal column, not the language center of the =
brain.  It was good for what they were doing, but not for what we do.

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