Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-ma05.r1000.mx.aol.com (Internet Inbound) with ESMTP id D6FC638000093; Mon, 2 Jan 2012 18:34:01 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1RhrNS-0002hQ-AP for rs_out_1@blacksheep.org; Mon, 02 Jan 2012 23:33:14 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1RhrNR-0002hH-PP for rsgb_lf_group@blacksheep.org; Mon, 02 Jan 2012 23:33:13 +0000 Received: from out1.ip03ir2.opaltelecom.net ([62.24.128.239]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1RhrNP-00038s-84 for rsgb_lf_group@blacksheep.org; Mon, 02 Jan 2012 23:33:13 +0000 X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: Ar0YAJE9Ak9cHn1H/2dsb2JhbABDggWWAAOUUYEGgW0FAQEFCAEBA0kCLAEBAwUCAQMRBAEBCiUUAQQaBhYIBhMKAQICAQGHa7QxjA8EglqFKoUsAZJAh0U X-IronPort-AV: E=Sophos;i="4.71,446,1320624000"; d="scan'208,217";a="370992067" Received: from host-92-30-125-71.as13285.net (HELO xphd97xgq27nyf) ([92.30.125.71]) by out1.ip03ir2.opaltelecom.net with SMTP; 02 Jan 2012 23:32:57 +0000 Message-ID: <00a301ccc9a6$da87aaa0$0401a8c0@xphd97xgq27nyf> From: "mal hamilton" To: References: <008301ccc97c$51d9fcf0$0401a8c0@xphd97xgq27nyf> Date: Mon, 2 Jan 2012 23:32:54 -0000 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2600.0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2600.0000 X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001 Subject: Re: LF: Antennas Content-Type: multipart/alternative; boundary="----=_NextPart_000_00A0_01CCC9A6.DA1ED6B0" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.5 required=5.0 tests=HTML_20_30,HTML_MESSAGE 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: 0:2:438258944:93952408 X-AOL-SCOLL-URL_COUNT: 0 x-aol-sid: 3039ac1d600d4f023ee91503 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none This is a multi-part message in MIME format. ------=_NextPart_000_00A0_01CCC9A6.DA1ED6B0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Doug If you want to HEAR the signals with sufficient strength to work normal = CW . Large antennas of the kind I mentioned are normal on 160 metres for = working long haul DX.=20 Micro RX antennas are only useful for VISUAL QRSS signal observations or = receiving Broadcast high power stations. Let me know when you HEAR an Amateur radio EU signal with a micro = antenna at your qth. I can only HEAR signals on LF/MF from the USA with sufficient strength = for a CW audio QSO using a my large wire antenna system. They are visible on micro antennas at QRSS speeds but not AUDIBLE de mal/g3kev ----- Original Message -----=20 From: Douglas D. Williams=20 To: rsgb_lf_group@blacksheep.org=20 Sent: Monday, January 02, 2012 9:53 PM Subject: Re: LF: Antennas Mal, you lost me on this one. Are you suggesting I (or we.....here in = North America) erect large verticals, inv L systems, Rhombics, and V = beams in order to receive EU LF signals? I thought I was doing pretty well with my micro RX antenna! Doug KB4OEr =20 On Mon, Jan 2, 2012 at 6:28 PM, mal hamilton = wrote: LF es MF Reports from across the pond and other DX locations as far as = Tenneesee and Kansas using micro probe antennas are great for QRSS = speeds but not suitable for audio reception. Take 160 metres for example where it is normal to work world wide on = cw but antennas in use are large verticals, inv L systems, Rhombics and = V beams, therefore to have any chance of receiving signals at audio = level on LF or MF large antennas of the calibre used on 160 metres are = necessary. As well as TX at this QTH I also use large arrays for RX and often = hear signals from NA that would not be audible with small loops, micro = probes or ferrite sticks Recently on 500 I was able to copy a W stn 579 but a DL stn copied = only on screen, when I asked what strength the signal was I got no = reply!!!!!!!!!!!!! using a micro probe antenna. If a proper large antenna system is not used on LF es MF then there = is virtually NIL chance of an audio report from across the pond for EU = stns es vice versa Back some years ago I had audio reports from the Boston area but the = antennas were proper wire arrays as used on 160 metres Small hand held antennas are fine for High Power BC strength = signals but not for low power amateur signals to be heard No commercial LF/MF station would even consider an antenna of the = micro variety. When I was in the business some years ago on LF/MF Rhombics and = V-Beams were the norm de mal/g3kev ------=_NextPart_000_00A0_01CCC9A6.DA1ED6B0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Doug
If you want to HEAR the signals with sufficient = strength=20 to work normal CW . Large antennas of the kind I mentioned are = normal on=20 160 metres for working long haul DX.
Micro RX antennas are only useful for VISUAL = QRSS signal=20 observations or receiving Broadcast high power stations.
Let me know when you HEAR an Amateur radio =  EU signal=20 with a micro antenna at your qth.
I can only HEAR signals on LF/MF from the USA = with=20 sufficient strength for a CW audio QSO using a my large wire = antenna=20 system.
They are visible on micro antennas at QRSS = speeds but not=20 AUDIBLE
 
de mal/g3kev
 
----- Original Message -----
From:=20 Douglas = D.=20 Williams
Sent: Monday, January 02, 2012 = 9:53=20 PM
Subject: Re: LF: Antennas

Mal, you lost me on this one. Are you suggesting I (or = we.....here in=20 North America) erect large verticals, inv L systems, Rhombics, and V = beams in=20 order to receive EU LF signals?
 
 
I thought I was doing pretty well with my micro RX antenna!
 
 
Doug KB4OEr
 


 
On Mon, Jan 2, 2012 at 6:28 PM, mal hamilton = <g3kevmal@talktalk.net>=20 wrote:
LF es MF
Reports from across the pond and other DX = locations as=20 far as Tenneesee and Kansas using micro probe antennas are great for = QRSS=20 speeds but not suitable for audio reception.
Take 160 metres for example where it is = normal to work=20 world wide on cw but antennas in use are large verticals, inv L = systems,=20 Rhombics and V beams, therefore to have any chance of receiving = signals at=20 audio level on LF or MF large antennas of the calibre used on 160 = metres are=20 necessary.
As well as TX at this QTH I also use large = arrays for=20 RX and often hear signals from NA that would not be audible with = small=20 loops, micro probes or ferrite sticks
Recently on 500 I was able to copy a W stn = 579 but a=20 DL stn copied only on screen, when I asked what strength the signal = was I=20 got no reply!!!!!!!!!!!!! using a micro probe antenna.
If a proper large antenna system is not used = on LF es=20 MF then there is virtually NIL chance of an audio report from across = the=20 pond for EU stns es vice versa
Back some years ago I had audio reports from = the=20 Boston area but the antennas were proper wire arrays as used on 160=20 metres
Small hand held antennas are fine = for High Power=20  BC strength signals but not for low power amateur signals to = be=20 heard
No commercial LF/MF station would even = consider an=20 antenna of the micro variety.
When I was in the business some years ago on = LF/MF=20 Rhombics and V-Beams were the norm
de mal/g3kev
 
 
 
 

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