>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
>-----Original Message-----
>From: [email protected]
>[mailto:[email protected]] On Behalf Of
>[email protected]
>Sent: Saturday, September 28, 2013 3:34 PM
>To: [email protected]
>Subject: Re: LF: Soft keying...
>
>Hard keying also helps crack DX pileups.
>
>Jay W1VD WD2XNS WE2XGR/2 WG2XRS/2
>
>
>----- Original Message -----
>From: "Stefan Schäfer" <[email protected]>
>To: <[email protected]>
>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
>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
>>>
>>>
>
>
>
>
>-----
>E-Mail ist virenfrei.
>Von AVG überprüft - www.avg.de
>Version: 2013.0.3408 / Virendatenbank: 3222/6705 -
>Ausgabedatum: 27.09.2013
>
|
