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[129.206.22.206]) by mx.google.com with ESMTPSA id eb4sm9840812wic.16.2014.08.08.11.44.59 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Fri, 08 Aug 2014 11:44:59 -0700 (PDT) From: DK7FC <73dk7fc@googlemail.com> X-Google-Original-From: DK7FC <73dk7fc@gmail.com> Message-ID: <53E51AA9.8060408@gmail.com> Date: Fri, 08 Aug 2014 20:44:57 +0200 User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; de; rv:1.9.1.8) Gecko/20100227 Thunderbird/3.0.3 MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <095C9D4E586E45CAA3FE071EA4EA9818@HPG5401fr> <53E0F872.3030500@gmail.com> <64A3B1F0647248229C5C374887AA2FCB@F6CNI> <53E1EC0B.2060309@gmail.com> <1686C40AF97B4ABE99024972373C232A@HPG5401fr> <96662FC1BCA8402098A702D935EEC66F@F6CNI> In-Reply-To: <96662FC1BCA8402098A702D935EEC66F@F6CNI> X-Scan-Signature: eb65b97b00a71049be1fa526941c7b31 Subject: Re: LF: Re: Testing now a new RX antenna on MF... and DK7FCs garden progress ;-) Content-Type: multipart/alternative; boundary="------------070901060204010004060904" X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Scanned-By: MIMEDefang 2.56 on 10.1.3.10 Status: O X-Status: X-Keywords: X-UID: 186 This is a multi-part message in MIME format. --------------070901060204010004060904 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Hello André, Fine fine! For the tests it may be useful to do QRP here so the SNR drops to negative values on your side (?). Or do you need the 40 dB dynamic range of WSPR for the tests? Well, 2 days ago i planned to come on air with the new RX antenna. But again it took several hours to remove greenery and stuff just to reach the location below the tree where i wanted to hang up the second end of the T antenna. But now, today everything worked well and the antenna is now lifted and fixed in its final position. Total length of wire is about 20m (guess 100...150 pF) and height above ground is 6...15m. Effective height could be 8m. I hammered a ground rod into the stony soil, 1,2m deep :-) Tomorrow i will start doing measurements and matching to 475 kHz / 50 Ohm. I expect losses of 100...150 Ohm so it will not be a efficient TX antenna. However i expect it will be an excellent RX antenna which is the actual goal :-) Looking forward to that :-) Thus i will stop TXing WSPR on MF next afternoon because i need the equipment in the garden... Then, maybe, you will catch a weak signal on MF from JN49IK24. 73, Stefan/DK7FC Am 08.08.2014 10:55, schrieb André Guyé: > Hello Stefan, > I’ll try many other tests to day and saturday at day time, including : > > * a 45° change in the K9AY direction of the 4 support wires ; > * an extra relay system to use only one of the two out of phase > verticals. That means it can works also as a single vertical > monopole. > > Note : I have still the terrific local QRM carrier running on 475725 > kHz, so I need to use a 100 Hz filter to kill it, or I copy > nothing.... Of course, using such a sharp DSP filter here, means that > the S/N reports ts not realist here. But, the relative values are the > most important in this test, even you know that the WSPR S/N is not > linear for positives values. > 73, F6CNI. > *From:* Guyé André > *Sent:* Wednesday, August 6, 2014 11:48 AM > *To:* rsgb_lf_group@blacksheep.org > *Subject:* LF: Re: Testing now a new RX antenna on MF > Hello Stefan. > I just start my RX now, hunting at your signal. > I’ll test the both antennas K9AY (in the 4 possible directions) and > the 2 els out of phase verticals, to see the diferences. On day time > your signal is stable + / – 1 dB. > So, more info in the evening. > 73 F6CNI > > > ------------------------------------------------------------------------ > > > Ce courrier électronique ne contient aucun virus ou logiciel > malveillant parce que la protection Antivirus avast! > est active. > > --------------070901060204010004060904 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: 8bit Hello André,

Fine fine! For the tests it may be useful to do QRP here so the SNR drops to negative values on your side (?). Or do you need the 40 dB dynamic range of WSPR for the tests?

Well, 2 days ago i planned to come on air with the new RX antenna. But again it took several hours to remove greenery and stuff just to reach the location below the tree where i wanted to hang up the second end of the T antenna.
But now, today everything worked well and the antenna is now lifted and fixed in its final position. Total length of wire is about 20m (guess 100...150 pF) and height above ground is 6...15m. Effective height could be 8m. I hammered a ground rod into the stony soil, 1,2m deep :-)

Tomorrow i will start doing measurements and matching to 475 kHz / 50 Ohm. I expect losses of 100...150 Ohm so it will not be a efficient TX antenna. However i expect it will be an excellent RX antenna which is the actual goal :-) Looking forward to that :-) Thus i will stop TXing WSPR on MF next afternoon because i need the equipment in the garden... Then, maybe, you will catch a weak signal on MF from JN49IK24.

73, Stefan/DK7FC



Am 08.08.2014 10:55, schrieb André Guyé:
Hello Stefan,
 
I’ll try many other tests to day and saturday at day time, including :
  • a 45° change in the K9AY direction of the 4 support wires ;
  • an extra relay system to use only one of the two out of phase verticals. That means it can works also as a single vertical monopole.
Note : I have still the terrific local QRM carrier running on 475725 kHz, so I need to use a 100 Hz filter to kill it, or I copy nothing.... Of course, using such a sharp DSP filter here, means that the S/N reports ts not realist here. But, the relative values are the most important in this test, even you know that the WSPR S/N is not linear for positives values.
 
73, F6CNI.
 
Sent: Wednesday, August 6, 2014 11:48 AM
Subject: LF: Re: Testing now a new RX antenna on MF
 
Hello Stefan.
 
I just start my RX now, hunting at your signal.
 
I’ll test the both antennas K9AY (in the 4 possible directions) and the 2 els out of phase verticals, to see the diferences. On day time your signal is stable + / – 1 dB.
 
So, more info in the evening.
 
73 F6CNI
 


Ce courrier électronique ne contient aucun virus ou logiciel malveillant parce que la protection Antivirus avast! est active.


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