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From: "Clemens Paul" <cpaul@gmx.net>
To: <rsgb_lf_group@blacksheep.org>
References: <23ht99dnd852tktkm8dwyomi.1380368630043@email.android.com> <5246D322.9060306@iup.uni-heidelberg.de> <002501cebc4f$6a61ddc0$6401a8c0@JAYDELL>
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Date: Sat, 28 Sep 2013 16:10:34 +0200
Message-ID: <E6887A327F39495CB9D9EB7BD94864E2@Clemens0811>
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Subject: RE: LF: Soft keying...
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Status: O

 >Hard keying also helps crack DX pileups.

Perhaps a bit like when ssb stations crank up all controls
of their transmitter to crack a pileup.
They become louder - and very broad due to poor imd 3.
But it seems to help.

73
Clemens
DL4RAJ=20
=20

>-----Original Message-----
>From: owner-rsgb_lf_group@blacksheep.org=20
>[mailto:owner-rsgb_lf_group@blacksheep.org] On Behalf Of=20
>jrusgrove@comcast.net
>Sent: Saturday, September 28, 2013 3:34 PM
>To: rsgb_lf_group@blacksheep.org
>Subject: Re: LF: Soft keying...
>
>Hard keying also helps crack DX pileups.
>
>Jay W1VD  WD2XNS  WE2XGR/2  WG2XRS/2
>
>
>----- Original Message -----=20
>From: "Stefan Sch=E4fer" <Stefan.Schaefer@iup.uni-heidelberg.de>
>To: <rsgb_lf_group@blacksheep.org>
>Sent: Saturday, September 28, 2013 9:01 AM
>Subject: Re: LF: Soft keying...
>
>
>Hi Christian,
>
>Yes i know. There are even special circuits to improve the shape of the
>CW slope, giving better readability. See attachment.
>
>73, Stefan
>
>
>Am 28.09.2013 13:43, schrieb C. Groeger:
>> BTW, Stefan,
>> under difficult conds with low signal strength (which is the=20
>case on 630 m) hard keying greatly=20
>> 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 Sch=E4fer<Stefan.Schaefer@iup.uni-heidelberg.de>  schrieb:
>>
>>
>>> Am 27.09.2013 20:51, schrieb Clemens Paul:
>>>
>>>> [...]
>>>> If you are seriously interested in generating a key click=20
>free CW signal,there's an
>>>> article about that
>>>> in QST 5/97 and 6/97 dealing with class E amps which would=20
>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=20
>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=20
>other projects
>>> got priority. Image:
>>>=20
>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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>Ausgabedatum: 27.09.2013=20
>