Keying can be made sufficiently hard without generating clicks. Instead of the old 5 msec rise time
'rule' make adjusts to the waveform so that the edges are still rounded ... just not too much so.
Listen locally on a suitably attenuated receiver while making adjustments.
Jay W1VD WD2XNS WE2XGR/2 WG2XRS/2
----- Original Message -----
From: "wolf_dl4yhf" <[email protected]>
To: <[email protected]>
Sent: Sunday, September 29, 2013 5:40 AM
Subject: Re: LF: Soft keying...
Pleasant to the ears of some maybe, and very annoying to the neighbours.
Please, if you have the choice, do NOT use hard-keying whereever possible.
73,
Wolf (who thought about returning to MF... up to now..)
Am 28.09.2013 13:43, schrieb C. Groeger:
BTW, Stefan,
under difficult conds with low signal strength (which is the case on 630 m) hard keying greatly
enhances readability of your CW !
And if you like QRQ, hard keyed CW is really essential for good copy!
You can check that easily on Hf, QRQ op's use hard keying...
73, df5qg
Christian Groeger
Stefan Schäfer <[email protected]> schrieb:
Am 27.09.2013 20:51, schrieb Clemens Paul:
[...]
If you are seriously interested in generating a key click free CW
signal,there's an
article about that
in QST 5/97 and 6/97 dealing with class E amps which would also apply to class
D amps.
73
Clemens
DL4RAJ
Yes.
Or that one: http://www.classeradio.com/classh.htm
I even built something similar some months ago. It is possible to adjust
the power from 0...> 1 kW with a small potentiometer. Somehow
fascinating. It was intended to send slow hell on the LF PA, not key
click free CW. The project is maybe 90% finished but then other projects
got priority. Image:
https://dl.dropboxusercontent.com/u/19882028/LF/20130927_211117.jpg You
can read the names of some ICs :-)
BTW when will your MF PA be finished?
73, Stefan/DK7FC
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