Content-class: urn:content-classes:message
MIME-Version: 1.0
Date: Sun, 11 Apr 2010 19:16:06 +0200
Message-ID: <38A51B74B884D74083D7950AD0DD85E82A1BDC@File-Server-HST.hst.e-technik.tu-darmstadt.de>
Thread-Topic: DFCW
Thread-Index: AcrZgbP02b8Quq4xQx2Tuj8zFsU74wAF2m24
References: <4BC1E717.21514.149803B@mike.dennison.ntlworld.com>
From: =?iso-8859-1?Q?Stefan_Sch=E4fer?= <schaefer@hst.tu-darmstadt.de>
To: <rsgb_lf_group@blacksheep.org>
Content-Type: multipart/mixed;
	boundary="----_=_NextPart_001_01CAD99A.ABD60223"
Subject: LF: AW: DFCW
Sender: owner-rsgb_lf_group@blacksheep.org
Precedence: bulk
Reply-To: rsgb_lf_group@blacksheep.org


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Hello Mike,=20
=20
Well, i don't think i am an "DFCW expert" but i often use it ;-)
=20
How have you modified your DDS to allow you to transmit DFCW? I have done=
 the same before a few weeks and it works quiete fine. The DFCW shift is=
 given by the RS232 level of the QRS program. This allows one increment or=
 decrement. So my shift is 50mHz, 0,5Hz, 5Hz and so on, since i use a f/2=
 divider in the PA ;-)
=20
I normally specify the frequency of the dash, so the dot is on the loswer=
 frequency with the given shift.
=20
Yes, ON7YD's QRS is also still my favorite. Just works fine...
=20
I also use double space but additionally i choose "ommit redundant key gap=
s". This is all a litte "matter of taste", just like the 1:3 ratio in CW=
 (hand given). ON VLF in DFCW-120 i think i will chosse "single space" if=
 i will ever make a QSO there ;-)
=20
Wish you fun there above on 136 kHz ;-)
=20
73, Stefan/DK7FC

________________________________

Von: owner-rsgb_lf_group@blacksheep.org im Auftrag von Mike Dennison
Gesendet: So 11.04.2010 16:13
An: rsgb_lf_group@blacksheep.org
Betreff: LF: DFCW



After many years of using QRSS, I have been spurred into modifying my
DDS to give me DFCW capability for the first time.

Would experienced DFCW operators please give me the benefit of their
experience?

If you are specifying a frequency, do you quote the Dash, Dot or
centre frequency?

I am using ON7YD's 'QRS' software and it seems that the clearest
signal is given by the following settings:
"DFCW double space"
"Key Gap 1s" (for 3sec dots)

This gives a good visible gap between characters and a small gap
between elements.

It looks like the signal might be clearer when using 4s dots.

What do the experts think?

Mike, G3XDV
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

It looks like



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