Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-dd03.r1000.mx.aol.com (Internet Inbound) with ESMTP id E333038000081; Sat, 21 Jul 2012 02:57:15 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1SsTbI-0003iF-VY for rs_out_1@blacksheep.org; Sat, 21 Jul 2012 07:55:40 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1SsTbI-0003i6-Ca for rsgb_lf_group@blacksheep.org; Sat, 21 Jul 2012 07:55:40 +0100 Received: from eterpe-smout.broadpark.no ([80.202.8.16]) by relay1.thorcom.net with esmtp (Exim 4.77) (envelope-from ) id 1SsTbG-00033i-Fs for rsgb_lf_group@blacksheep.org; Sat, 21 Jul 2012 07:55:39 +0100 Received: from terra-smin.broadpark.no ([80.202.8.13]) by eterpe-smout.broadpark.no (Sun Java(tm) System Messaging Server 7u3-15.01 64bit (built Feb 12 2010)) with ESMTP id <0M7I00GJQ0KNCG80@eterpe-smout.broadpark.no> for rsgb_lf_group@blacksheep.org; Sat, 21 Jul 2012 08:55:35 +0200 (CEST) Received: from [192.168.43.23] ([178.232.12.27]) by terra-smin.broadpark.no (Sun Java(tm) System Messaging Server 7u3-15.01 64bit (built Feb 12 2010)) with ESMTPA id <0M7I000Y10KMSNF0@terra-smin.broadpark.no> for rsgb_lf_group@blacksheep.org; Sat, 21 Jul 2012 08:55:35 +0200 (CEST) Date: Sat, 21 Jul 2012 08:55:42 +0200 From: Steinar Aanesland In-reply-to: <50095959.30204@iup.uni-heidelberg.de> To: rsgb_lf_group@blacksheep.org Message-id: <500A526E.1010903@broadpark.no> MIME-version: 1.0 References: <50092840.8010002@broadpark.no> <50095959.30204@iup.uni-heidelberg.de> User-Agent: Mozilla/5.0 (Windows NT 6.1; rv:14.0) Gecko/20120713 Thunderbird/14.0 X-Spam-Score: -0.7 (/) 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 Stefan. Thanks for your answer :) la5vna S Den 20.07.2012 15:12, skrev Stefan Schäfer: > Hello Steinar, > > Am 20.07.2012 11:43, schrieb Steinar Aanesland: >> Hi Stefan >> >> Is this the MFJ 259B HF antenna analyzer modification? >> >> http://www.we0h.us/Amateur_Radio_stuff/MFJ/MFJ-259B/LF-MF-Mods/ >> >> la5vna S >> > > Yes, this it is! Well documented by a few images. For LF i used a 10mH > fixed inductor (looking about like a resistor) and for MF i took a > FT50-77 and about 30 turns or so. A fixed inductor would work as well > i think. Just insert it and see what the range is... > > 73, Stefan/DK7FC > > > >> >> Fra: owner-rsgb_lf_group@blacksheep.org >> [mailto:owner-rsgb_lf_group@blacksheep.org] På vegne av Stefan Schäfer >> Sendt: 19. juli 2012 01:55 >> Til: rsgb_lf_group@blacksheep.org >> Emne: Re: LF: 630 meter full size dipole >> >> Hi Jay, >> >> Interesting, thanks for the info!! Yes and that could be a real >> alternative for those with a small garden and a stressing XYL. The wire >> for the dipole can be quite small and fits into a backpack. >> Then its a question of the dependency of the antenna efficiency as a >> function of the ground conductivity. This will be one of the interesting >> results! >> 10m above ground is not much for a 630m band dipole but if the >> difference to 2m above the ground is just a few dB, one can easily >> through out the wire during taking a walk and can do some MF /p >> operation, without a kite, without the need for a free field, without a >> tower, without a good earth (connection)... Many advantages! Maybe... >> >> BTW i have also modified (extended) the range of my MFJ 259B HF antenna >> analyzer to cover MF (313...658 kHz) and LF (103...209 kHz). This >> modification is done very easy! I'm not sure how accurate the >> measurements are in that range but maybe it gives me some ideas "where i >> am". >> >> Looking forward to that test! >> >> 73, Stefan/DK7FC >> Stefan >> >> This may be of interest for your next exploit ... >> >> Looking back in my 500 kHz log, I see that on 1/3/2010 I had a CW QSO >> with [...] Content analysis details: (-0.7 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.7 RCVD_IN_DNSWL_LOW RBL: Sender listed at http://www.dnswl.org/, low trust [80.202.8.16 listed in list.dnswl.org] -0.0 T_RP_MATCHES_RCVD Envelope sender domain matches handover relay domain X-Scan-Signature: 69d86b33142413363dd56bd312139bf4 Subject: Re: LF: MFJ 259B HF antenna analyzer modification Content-type: text/plain; charset=ISO-8859-1 Content-transfer-encoding: QUOTED-PRINTABLE X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.0 required=5.0 tests=none 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 x-aol-global-disposition: G X-AOL-SCOLL-SCORE: 0:2:438410752:93952408 X-AOL-SCOLL-URL_COUNT: 0 x-aol-sid: 3039ac1d408f500a52cb1c6b X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none Hi Stefan. Thanks for your answer :) la5vna S Den 20.07.2012 15:12, skrev Stefan Sch=E4fer: > Hello Steinar, > > Am 20.07.2012 11:43, schrieb Steinar Aanesland: >> Hi Stefan >> >> Is this the MFJ 259B HF antenna analyzer modification? >> >> http://www.we0h.us/Amateur_Radio_stuff/MFJ/MFJ-259B/LF-MF-Mods/ >> >> la5vna S >> =20 > > Yes, this it is! Well documented by a few images. For LF i used a 1= 0mH > fixed inductor (looking about like a resistor) and for MF i took a > FT50-77 and about 30 turns or so. A fixed inductor would work as we= ll > i think. Just insert it and see what the range is... > > 73, Stefan/DK7FC > > > >> >> Fra: owner-rsgb_lf_group@blacksheep.org >> [mailto:owner-rsgb_lf_group@blacksheep.org] P=E5 vegne av Stefan S= ch=E4fer >> Sendt: 19. juli 2012 01:55 >> Til: rsgb_lf_group@blacksheep.org >> Emne: Re: LF: 630 meter full size dipole >> >> Hi Jay, >> >> Interesting, thanks for the info!! Yes and that could be a real >> alternative for those with a small garden and a stressing XYL. The= wire >> for the dipole can be quite small and fits into a backpack. >> Then its a question of the dependency of the antenna efficiency as= a >> function of the ground conductivity. This will be one of the inter= esting >> results! >> 10m above ground is not much for a 630m band dipole but if the >> difference to 2m above the ground is just a few dB, one can easily >> through out the wire during taking a walk and can do some MF /p >> operation, without a kite, without the need for a free field, with= out a >> tower, without a good earth (connection)... Many advantages! Maybe= ... >> >> BTW i have also modified (extended) the range of my MFJ 259B HF an= tenna >> analyzer to cover MF (313...658 kHz) and LF (103...209 kHz). This >> modification is done very easy! I'm not sure how accurate the >> measurements are in that range but maybe it gives me some ideas "w= here i >> am". >> >> Looking forward to that test! >> >> 73, Stefan/DK7FC >> Stefan >> >> This may be of interest for your next exploit ... >> >> Looking back in my 500 kHz log, I see that on 1/3/2010 I had a CW = QSO >> with WD2XSH/35 in South Dakota ... who was running a full size 600= meter >> dipole. As I recall his antenna was relatively low at 30 or 40' ab= ove >> ground and he was running only 50 or 100 watts. His signal was wea= k but >> solid copy over the few nights that he was active. Distance was 12= 10 mi >> / 1950kM. Believe his antenna was 'out in the open' as he apparent= ly >> owns a good sized farm. >> >> Jay W1VD WD2XNS WE2XGR/2 >> >> >> >> >> =20 > >