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[195.171.43.25]) by mx.google.com with ESMTP id z8si4326014eee.173.2013.10.25.01.23.27 for ; Fri, 25 Oct 2013 01:23:28 -0700 (PDT) Received-SPF: neutral (google.com: 195.171.43.25 is neither permitted nor denied by best guess record for domain of owner-rsgb_lf_group@blacksheep.org) client-ip=195.171.43.25; Authentication-Results: mx.google.com; spf=neutral (google.com: 195.171.43.25 is neither permitted nor denied by best guess record for domain of owner-rsgb_lf_group@blacksheep.org) smtp.mail=owner-rsgb_lf_group@blacksheep.org; dkim=pass header.i=@mx.aol.com Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1VZcfF-0001KE-Ag for rs_out_1@blacksheep.org; Fri, 25 Oct 2013 09:22:37 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1VZcfE-0001K2-Om for rsgb_lf_group@blacksheep.org; Fri, 25 Oct 2013 09:22:36 +0100 Received: from omr-m08.mx.aol.com ([64.12.222.129]) by relay1.thorcom.net with esmtps (TLSv1:AES256-SHA:256) (Exim 4.77) (envelope-from ) id 1VZcfA-0005PG-CJ for rsgb_lf_group@blacksheep.org; Fri, 25 Oct 2013 09:22:35 +0100 Received: from mtaout-ma04.r1000.mx.aol.com (mtaout-ma04.r1000.mx.aol.com [172.29.41.4]) by omr-m08.mx.aol.com (Outbound Mail Relay) with ESMTP id AF1FB700000A4 for ; Fri, 25 Oct 2013 04:22:30 -0400 (EDT) Received: from White (95-91-237-85-dynip.superkabel.de [95.91.237.85]) by mtaout-ma04.r1000.mx.aol.com (MUA/Third Party Client Interface) with ESMTPA id CBCAEE000086 for ; Fri, 25 Oct 2013 04:22:29 -0400 (EDT) Message-ID: From: "Markus Vester" To: References: Date: Fri, 25 Oct 2013 10:22:16 +0200 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal Importance: Normal X-Mailer: Microsoft Windows Live Mail 12.0.1606 X-MimeOLE: Produced By Microsoft MimeOLE V12.0.1606 x-aol-global-disposition: G DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mx.aol.com; s=20121107; t=1382689350; bh=tdWW8PzDUCEXEQCo3dlmyW+umzLFaDRTE1MRrbIWG0s=; h=From:To:Subject:Message-ID:Date:MIME-Version:Content-Type; b=dg/+mvOpCzElrZ4ixsJUMdpEXDv+CA1PRjOvcd4Lrdw293S1dJtExBuWNn45aKMGF C6oSy5D2Yr+c0If3FXtTVK2nfAuNuxhsptq5H9Xa8OhG/spWmMqCCpVIWNz/ZU0Tjo RBbAAWwIHaQqfX1GFvXYKLB96NtZmjp3tj/o1ruc= x-aol-sid: 3039ac1d2904526a2a45010d X-AOL-IP: 95.91.237.85 X-Spam-Score: -0.4 (/) X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has identified this incoming email as possible spam. The original message has been attached to this so you can view it (if it isn't spam) or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: Hi Victor, +232 dB sounds impressive doesn't it ;-) In reality the level difference is not so large. DCF77 comes in around 8 mV/m at 160 km distance, inducing an unloaded voltage of 8 mV on my antenna. Transforming from 17 ohms and loading would make that 7 mV at 50 ohms (-30 dBm, S9+43). The best signals from CFH were around 40 dB less than DCF77. [...] Content analysis details: (-0.4 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [64.12.222.129 listed in list.dnswl.org] 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (markusvester[at]aol.com) -0.0 SPF_PASS SPF: sender matches SPF record -0.4 RP_MATCHES_RCVD Envelope sender domain matches handover relay domain 0.0 HTML_MESSAGE BODY: HTML included in message 0.0 T_DKIM_INVALID DKIM-Signature header exists but is not valid X-Scan-Signature: 0c28add2673aaa1c8f62f1695e18ff8b Subject: Re: LF: RE: Diplexer 137 / 74 kHz Content-Type: multipart/alternative; boundary="----=_NextPart_000_002B_01CED16C.14389A10" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: * X-Spam-Status: No, hits=1.7 required=5.0 tests=HTML_40_50,HTML_FONTCOLOR_BLUE, HTML_MESSAGE,MAILTO_TO_SPAM_ADDR,MISSING_OUTLOOK_NAME autolearn=no version=2.63 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 Status: O X-Status: X-Keywords: X-UID: 2661 Dies ist eine mehrteilige Nachricht im MIME-Format. ------=_NextPart_000_002B_01CED16C.14389A10 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi Victor, +232 dB sounds impressive doesn't it ;-) In reality the level difference is not so large. DCF77 comes in around 8 = mV/m at 160 km distance, inducing an unloaded voltage of 8 mV on my = antenna. Transforming from 17 ohms and loading would make that 7 mV at = 50 ohms (-30 dBm, S9+43). The best signals from CFH were around 40 dB = less than DCF77.=20 My LF transmitter was delivering about 55 dBm ("S9+128 dB"), and the = level difference to CFH is "only" around 125 dB. Best 73, Markus (DF6NM) From: victor13@online.nl=20 Sent: Friday, October 25, 2013 6:09 AM To: rsgb_lf_group@blacksheep.org=20 Subject: LF: RE: Diplexer 137 / 74 kHz Very nice job Marcus,21 KV is S9+232dB! 73 Victor -----Oorspronkelijk bericht----- Van: owner-rsgb_lf_group@blacksheep.org = [mailto:owner-rsgb_lf_group@blacksheep.org]Namens Markus Vester Verzonden: vrijdag 25 oktober 2013 2:47 Aan: rsgb_lf_group@blacksheep.org Onderwerp: LF: Diplexer 137 / 74 kHz This thing amazes me:=20 As noted a while ago, I have connected a makeshift diplexer with the = LF transmitter and receiver on one port, and an additional 74.55 kHz = receiver to the other. =20 At the time of writing, I am transmitting on 137.62 kHz, about 300 W = making 4.2 A and 21 kV at the antenna. Now on the other RX, I can still = see DCF77 on 77.5 kHz, and even some of CFH 73.6 kHz from Canada, on the = same antenna which is actually radiating! There is some RX overload = reducing sensitivity by some 20 dB, but the both signals are still = there, and not swamped by noise from the TX or partial discharges. There's a circuit and some pics in = df6nm.bplaced.net/LF/74kHz/Diplexer/ Best 73, Markus (DF6NM) PS1 Got a good "X" from Bob around 23 UT. Should better shut up and = watch! http://dl.dropboxusercontent.com/u/26404526/df6nm_74kHz.jpg PS2 Just received a mail from Jay saying that he picked me up in = WSPR-15. Should better go about transmitting again ;-)=20 ------=_NextPart_000_002B_01CED16C.14389A10 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Hi Victor,
 
+232 dB sounds impressive doesn't it=20 ;-)
 
In reality the level difference is not = so large.=20 DCF77 comes in around 8 mV/m at 160 km distance, inducing an = unloaded=20 voltage of 8 mV on my antenna. Transforming from 17 ohms and loading = would make=20 that 7 mV at 50 ohms (-30 dBm, S9+43). The best signals from CFH = were=20 around 40 dB less than DCF77.
 
My LF transmitter was delivering = about 55 dBm=20 ("S9+128 dB"), and the level difference to CFH is "only" = around 125=20 dB.
 
Best 73,
Markus (DF6NM)
 

Sent: Friday, October 25, 2013 6:09 AM
To: rsgb_lf_group@blacksheep.org= =20
Subject: LF: RE: Diplexer 137 / 74 kHz

Very=20 nice job Marcus,21 KV is S9+232dB!
 
73
Victor
-----Oorspronkelijk bericht-----
Van: owner-rsgb_lf_group@bl= acksheep.org=20 [mailto:owner-rsgb_lf_group@blacksheep.org]Namens Markus=20 Vester
Verzonden: vrijdag 25 oktober 2013 = 2:47
Aan: rsgb_lf_group@blacksheep.org=
Onderwerp:=20 LF: Diplexer 137 / 74 kHz

This thing amazes me:
 
As noted a while ago, I have = connected a=20 makeshift diplexer with the LF transmitter and receiver on = one port,=20 and an additional 74.55 kHz receiver to the = other.  
 
At the time of writing, I am = transmitting on=20 137.62 kHz, about 300 W making 4.2 A and 21 kV at the antenna. Now on = the=20 other RX, I can still see DCF77 on 77.5 kHz, and even some of CFH 73.6 = kHz=20 from Canada, on the same antenna which is actually=20 radiating! There is some RX overload reducing sensitivity by some = 20 dB,=20 but the both signals are still there, and not swamped by = noise from=20 the TX or partial discharges.
 
There's a circuit and some pics = in df6nm.bplaced.net/LF= /74kHz/Diplexer/
 
Best 73,
Markus (DF6NM)
 
PS1 Got a = good "X" from Bob around=20 23 UT. Should better shut up and watch! http= ://dl.dropboxusercontent.com/u/26404526/df6nm_74kHz.jpg
PS2 Just received a mail from Jay = saying that he=20 picked me up in WSPR-15. Should better go about transmitting=20 again ;-) 
 
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