Message-ID: <47AAFDE9.3090001@toya.net.pl>
Date: Thu, 07 Feb 2008 13:47:37 +0100
From: =?UTF-8?B?UGlvdHIgTcWCeW5hcnNraQ==?= <sq7mpj@toya.net.pl>
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To:  rsgb_lf_group@blacksheep.org
References: <BEA259931570B948B5DF6825FA3F2D640BE746CC@EXUKMB49.eur.nsroot.net>
In-Reply-To: <BEA259931570B948B5DF6825FA3F2D640BE746CC@EXUKMB49.eur.nsroot.net>
Subject: Re: LF: Swl report GI4DPE & G0MRF
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Scholz, Marco wrote:

>Hello,
>Yesterday evening i compared my Receiver FT-857 & Miniwhip against
>EKD-300 & Miniwhip and as expected the EKD was much better. I received
>very early the beacon of GI4DPE and later i had a good copy of G0MRF.
>However still not happy with the EKD-300 due the variable CW Pitch
>(500-1200Hz). Really hard to set a CW pitch which is exactly 700 or
>800Hz. Very quickly the signal is +/-20Hz and then the QRSS signal is
>out of the Spectran range. I also failed to receive the WOLF signal of
>M0BMU with the FT-857 it's no problem.
>Does anyone know how to set a fix CW pitch on the EKD (maybe it's a
>modification)?
>
>v73
>Marco
>
>DD7PC, JN49ax
>
>  
>
Dear  Marco, LF group

i am also a happy owner of the  EKD-300 and sure, you are right about 
the CW pitch 'flow'  in this receiver.
well, i suggest to  use its 200 kHz  IF output on the rear panel.  for 
example, you could make a downconverter
 which is 'equivalent' to local oscillator and the mixer. the local 
oscillator  can be realized easily by a  crystal with
 an appropriate frequency division and then the celebrated NE612 as a 
mixer so you could  end up with 'new' IF frequency
 in the range 10-20 kHz  directly injected into your sound card . the 
rest is done nicely by  a  Wolf's DL4YHF Spectrum Lab
absolutely superb software.
the other way to overcome your problem, the "fast" one,  is to use 
ekd-300 and ft857 together - you can 'feed' directly ft857
 with ekd-300 200 khz IF output . i have made short cable  connecting  
ekd's IF output with an antenna input of ft857
then you set the dial in ft857 as  200 kHz and the rest is obvious ie. 
'digital' cw pitch etc..
BTW. i did succeed with  Jim's M0BMU WOLF 20 transmission on several 
occasions using only ft857. 
ft857 has a nice and helpful feature  named  DSP CW Peaking Filter [ row 
"p" - DNR,DNF,DBF] - the center frequency of this DSP filter
is automatically aligned with your selected CW pitch , say, 600 Hz in my 
case and via the menu mode 45
 you can select the desired bandwidth of this filter ( 60, 120,240 Hz).

                                                   73 de peter, sq7mpj  
/jo91rs/


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Scholz, Marco wrote:
<blockquote   cite=3D"midBEA259931570B948B5DF6825FA3F2D640BE746CC@EXUKMB49.e=
ur.nsroot.net"   type=3D"cite">
  <pre wrap=3D"">Hello,
Yesterday evening i compared my Receiver FT-857 &amp; Miniwhip against
EKD-300 &amp; Miniwhip and as expected the EKD was much better. I received
very early the beacon of GI4DPE and later i had a good copy of G0MRF.
However still not happy with the EKD-300 due the variable CW Pitch
(500-1200Hz). Really hard to set a CW pitch which is exactly 700 or
800Hz. Very quickly the signal is +/-20Hz and then the QRSS signal is
out of the Spectran range. I also failed to receive the WOLF signal of
M0BMU with the FT-857 it's no problem.
Does anyone know how to set a fix CW pitch on the EKD (maybe it's a
modification)?

v73
Marco

DD7PC, JN49ax

  </pre>
</blockquote>
Dear=C2=A0 Marco, LF group<br>
<br>
i am also a happy owner of the=C2=A0 EKD-300 and sure, you are right about
the CW pitch 'flow'=C2=A0 in this receiver.<br>
well, i suggest to=C2=A0 use its 200 kHz=C2=A0 IF output on the rear panel.=
=C2=A0 for
example, you could make a downconverter<br>
=C2=A0which is 'equivalent' to local oscillator and the mixer. the local
oscillator=C2=A0 can be realized easily by a=C2=A0 crystal with<br>
=C2=A0an appropriate frequency division and then the celebrated NE612 as a
mixer so you could=C2=A0 end up with 'new' IF frequency<br>
=C2=A0in the range 10-20 kHz=C2=A0 directly injected into your sound card .=20=
the
rest is done nicely by=C2=A0 a=C2=A0 Wolf's DL4YHF Spectrum Lab<br>
absolutely superb software.<br>
the other way to overcome your problem, the "fast" one,=C2=A0 is to use
ekd-300 and ft857 together - you can 'feed' directly ft857 <br>
=C2=A0with ekd-300 200 khz IF output . i have made short cable=C2=A0 connect=
ing=C2=A0
ekd's IF output with an antenna input of ft857<br>
then you set the dial in ft857 as=C2=A0 200 kHz and the rest is obvious ie.
'digital' cw pitch etc..<br>
BTW. i did succeed with=C2=A0 Jim's M0BMU WOLF 20 transmission on several
occasions using only ft857.=C2=A0 <br>
ft857 has a nice and helpful feature=C2=A0 named=C2=A0 DSP CW Peaking Filter=
 [
row "p" - DNR,DNF,<b>DBF</b>] - the center frequency of this DSP filter
<br>
is automatically aligned with your selected CW pitch , say, 600 Hz in
my case and via the menu mode 45 <br>
=C2=A0you can select the desired bandwidth of this filter ( 60, 120,240 Hz).
<br>
<br>
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=20=
73 de peter, sq7mpj=C2=A0
/jo91rs/<br>
<br>
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