Return-Path: Received: from mtain-mp12.r1000.mx.aol.com (mtain-mp12.r1000.mx.aol.com [172.29.193.80]) by air-de05.mail.aol.com (v129.4) with ESMTP id MAILINDE053-5eb44d3af057312; Sat, 22 Jan 2011 09:57:27 -0500 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-mp12.r1000.mx.aol.com (Internet Inbound) with ESMTP id B60D138000092; Sat, 22 Jan 2011 09:57:25 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1Pgesl-0003dC-AP for rs_out_1@blacksheep.org; Sat, 22 Jan 2011 14:56:03 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1Pgesj-0003d3-Rz for rsgb_lf_group@blacksheep.org; Sat, 22 Jan 2011 14:56:01 +0000 Received: from out1.ip07ir2.opaltelecom.net ([62.24.128.243]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1Pgesh-0006yn-2E for rsgb_lf_group@blacksheep.org; Sat, 22 Jan 2011 14:56:01 +0000 X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: AhIFAFd+Ok1Ok89t/2dsb2JhbACCQZNgjk1zvTKFUASBX40Bgl4 X-IronPort-AV: E=Sophos;i="4.60,362,1291593600"; d="scan'208,217";a="477342133" Received: from unknown (HELO xphd97xgq27nyf) ([78.147.207.109]) by out1.ip07ir2.opaltelecom.net with SMTP; 22 Jan 2011 14:55:51 +0000 Message-ID: <006201cbba44$754d6520$0401a8c0@xphd97xgq27nyf> From: "mal hamilton" To: References: <004a01cbb99f$182a38f0$0401a8c0@xphd97xgq27nyf> Date: Sat, 22 Jan 2011 14:55:49 -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: Alpha benchmark Content-Type: multipart/alternative; boundary="----=_NextPart_000_005F_01CBBA44.74F05100" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.8 required=5.0 tests=HTML_30_40,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-sid: 3039ac1dc1504d3af0553174 X-AOL-IP: 195.171.43.25 ------=_NextPart_000_005F_01CBBA44.74F05100 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable No problem but at present all antennas diverted back to 500 and 137=20 On the Alpha freqs and down to 9 Khz the difference between antenna OF= F/ON is 30 dB atmospheric noise. Alpha signals always strong with me day or night on average 25dB over= noise, some qsb effects at times. This qth is in a noise free environment, all electric and telephone wi= res underground and antennas some hundred metres in the opposite direc= tion.=20 Nearest overhead grid line some several miles away. de mal/g3kev ----- Original Message -----=20 From: Laurence KL7UK=20 To: rsgb_lf_group@blacksheep.org=20 Sent: Friday, January 21, 2011 9:49 PM Subject: RE: LF: Alpha benchmark Can we get a say 24 hour plot of Alphas/ signal to noise for your= location Mal please? Id be very interested to see how quiet your loca= tion is. =20 Cheers =20 ----------------------------------------------------------------------= -------- From: g3kevmal@talktalk.net To: rsgb_lf_group@blacksheep.org Date: Fri, 21 Jan 2011 19:12:05 +0000 Subject: LF: Alpha benchmark vlf As a guide for those interested in VLF 9 Khz it would be useful if= each station could use the Alpha station on 11905 Khz as a benchmark= for quality of reception. and let us all know hown efficient their RX system is. In my case using an inv L 150 metres total length not resonated the= report is minus 60 dB with a sig over noise of 25 dB. This seems an= acceptable system for 9 Khz reception. I can do better by resonating the antenna, or using my 136 antenna= system re-resonated for 9 Khz=20 I get the impression that at some locations receiving is a problem,= for various reasons including noise from being in the middle of a Urb= an environment. Can we have some data. de mal/g3kev ------=_NextPart_000_005F_01CBBA44.74F05100 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
No problem but at present all antennas diverte= d back to=20 500 and 137
On the Alpha freqs and down to 9 Khz the diffe= rence=20 between antenna OFF/ON is 30 dB atmospheric noise.
Alpha signals always strong with me day or nig= ht on=20 average 25dB over noise, some qsb effects at times.
This qth is in a noise free environment, all= electric and=20 telephone wires underground and antennas some hundred metres in the op= posite=20 direction.
Nearest overhead grid line some several miles= =20 away.
de mal/g3kev
 
 
----- Original Message -----
From:=20 Laurence KL7UK
Sent: Friday, January 21, 201= 1 9:49=20 PM
Subject: RE: LF: Alpha benchm= ark

Can we get a  say 24 hour plot of Alphas/ signal= to noise=20 for your location Mal please? Id be very interested to see how= quiet your=20 location is.
 
Cheers
 
From: g3kevmal@talktalk.net=
To:=20 rsgb_lf_group@bl= acksheep.org
Date:=20 Fri, 21 Jan 2011 19:12:05 +0000
Subject: LF: Alpha benchmark
<= BR>
vlf
As a guide for those interested in= VLF 9 Khz it=20 would be useful if each station could use the Alpha station on 11905= Khz as a=20 benchmark for quality of reception.
and let us all know hown efficient= their RX=20 system is.
In my case using an inv L 150 metre= s total length=20 not resonated the report is minus 60 dB with a sig over no= ise of 25=20 dB. This seems an acceptable system for 9 Khz reception.
I can do better by resonating the= antenna,=20  or using my 136 antenna system re-resonated for 9 Kh= z=20
I get the impression that at some= locations=20 receiving is a problem, for various reasons including noise from bei= ng in the=20 middle of a Urban environment.
Can we have some data.
de mal/g3kev
 
 
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