Joe Subich, W4TV wrote:
Looking at the scope picture of a single Morse dit at G4AON's
site http://www.astromag.co.uk/k3/k3_envelope2.jpg indicates
the trailing edge might be a bigger contributor to potential
clicks than the leading edge of the waveform. Note the upper
right corner has a fairly "sharp" transition from "on" to
"falling" and compare that to the nicely shaped transition at
the upper left corner.
From all reports the K3 is more than acceptable but if any
additional effort is put into CW shaping, the "upper right"
transition may be a place to look.
Wayne has looked into an alternative shaping of the keyed envelope with
the intent of reducing the bandwidth of the keyed signal without
increasing (and possibly decreasing) the overall rise/fall times.
He's put this aside for now because he's working on higher priority
projects like the subreceiver, but I expect that at some time we will
see this.
As K3KO also noted, it's not all in the rise/fall times.
--
73,
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco
_______________________________________________
Elecraft mailing list
Post to: Elecraft@mailman.qth.net
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com
