I've just done some measurements with my K3... CW waveform rise and fall
times are both 5 mS (and doesn't alter when the speed is changed with
the internal keyer), which some would consider a bit soft - although my
measured bandwidth for 20 wpm keying at 100 Watts of RF is +/- 500 Hz at
70 dB below peak output, which is probably as clean as it gets.
Elecraft has chosen not to allow users to adjust Rise/Fall times
although
I suspect they remain open to input on the issue. This is not necessarily
a bad thing! The IC-7800, Orion and FT-2000 all allow adjustment, but
they ALL set default times that are guaranteed to generate key clicks.
The problem seems to be that the stated Rise/Fall times in their
menus are actually about twice actual. Thus setting 5 ms in will generate
measured Rise/Fall times of ~3 ms and hence key clicks. To tame Orion
you must set 7-8 ms which generates an actual waveform with Rise/Fall
in the area of 4 ms.
Kudos to Elecraft for NOT shipping the K3 in a default state that is
guaranteed to cause key clicks!
73, Bill W4ZV
--
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