Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-dl01.r1000.mx.aol.com (Internet Inbound) with ESMTP id 74EF538000085; Sat, 28 Jan 2012 14:14:17 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1RrDiL-0002cd-NP for rs_out_1@blacksheep.org; Sat, 28 Jan 2012 19:13:29 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1RrDiL-0002cU-4k for rsgb_lf_group@blacksheep.org; Sat, 28 Jan 2012 19:13:29 +0000 Received: from imr-ma05.mx.aol.com ([64.12.100.31]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1RrDiJ-0007H5-Io for rsgb_lf_group@blacksheep.org; Sat, 28 Jan 2012 19:13:29 +0000 Received: from mtaout-db05.r1000.mx.aol.com (mtaout-db05.r1000.mx.aol.com [172.29.51.197]) by imr-ma05.mx.aol.com (8.14.1/8.14.1) with ESMTP id q0SJDItP026552 for ; Sat, 28 Jan 2012 14:13:19 -0500 Received: from White (nrbg-4dbf02d3.pool.mediaWays.net [77.191.2.211]) by mtaout-db05.r1000.mx.aol.com (MUA/Third Party Client Interface) with ESMTPA id 7A3B7E0000AE for ; Sat, 28 Jan 2012 14:13:17 -0500 (EST) Message-ID: <600F77AB73BD430E801323C2BD1DA337@White> From: "Markus Vester" To: References: <4F2406CC.1000405@freenet.de> Date: Sat, 28 Jan 2012 20:13:16 +0100 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 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mx.aol.com; s=20110426; t=1327777999; bh=xSN6ALBBQDzzGt91ZanTOeKxxCXnyuW+oVHzJYIWINM=; h=From:To:Subject:Message-ID:Date:MIME-Version:Content-Type; b=R2xFc2CDoxpnJ//5uAL6w01Mc8JM8Fu2WHvr15PT61vaIBQowVLoHNHMrI2SQX+uW FwKBPtnathbGZcrxFd0QTdz+pT5C1Jgto4nFE0+2qZLby4P6eneb5MLx3/XGu7EjvL /xrJpGn8LLvTi8fv3lKVcGPZFPwC8vvfDluJrCd0= X-AOL-SCOLL-SCORE: 0:2:467856896:93952408 X-AOL-SCOLL-URL_COUNT: 0 X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001 Subject: Re: LF: VLF this morning in TN Content-Type: multipart/alternative; boundary="----=_NextPart_000_004C_01CCDDF9.4526D5F0" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: ** X-Spam-Status: No, hits=2.3 required=5.0 tests=CELL_PHONE_BOOST,HTML_40_50, HTML_FONTCOLOR_UNSAFE,HTML_MESSAGE,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 x-aol-global-disposition: G X-AOL-SCOLL-SCORE: 0:2:490291072:93952408 X-AOL-SCOLL-URL_COUNT: 0 X-AOL-SCOLL-AUTHENTICATION: mail_rly_antispam_dkim-m265.2 ; domain : mx.aol.com DKIM : pass x-aol-sid: 3039ac1d4acf4f2449097019 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none Dies ist eine mehrteilige Nachricht im MIME-Format. ------=_NextPart_000_004C_01CCDDF9.4526D5F0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi Doug, you could probably have heard the Omega's without the amplifier. One of = the fascinating radio experiences was when Geri DK8KW and I heard crisp = 11.9 kHz dashes from Alpha Krasnodar on a headphone connected to the LF = antenna, using only a line-output transformer tuned to resonance, and = nothing else inbetween. This was the same little backyard Marconi I = still use today (measured (in-)efficiency about -70 dB at 9 kHz), and an = average cheap "walkman" type headset. Well that was a dozen years ago. Guess I'll have to repeat the = experiment to see if I can still do it now, at age 53 ;-) Ah, this must = be the reason why we men need higher antennas as we grow old ;-)=20 Good luck for your VLF work! Best wishes,=20 Markus (DF6NM) From: Douglas D. Williams=20 Sent: Saturday, January 28, 2012 4:18 PM To: rsgb_lf_group@blacksheep.org=20 Subject: Re: LF: VLF this morning in TN Thank you Wolf. Those are nice captures for comparison. I see you have = no trouble receiving NAA, but the other two continental U.S. stations = are much weaker. The alpha stations are difficult for me to copy with the sound card, but = I can often hear them at night using my R75 and upconverter with the = 250Hz CW filter. The OMEGA system, when it was still active, put out some very strong = signals here. All one really needed to hear those was an audio amp, = short whip antenna, and headphones.....and sufficiently sensitive = hearing.=20 I find that when I listen to some of the live streaming "natural radio" = receivers in Europe, I can hear the Alphas in my right ear, but not my = left ear. Guess my high frequency hearing is starting to go. Doug - KB4OER On Sat, Jan 28, 2012 at 9:31 AM, wolf_dl4yhf wrote: Hi Douglas, Nice reception there. For comparison, I have made these broadband VLF = screenshots in the past: http://www.qsl.net/dl4yhf/vlf_rdf/latest_vlf_spectra.htm Will add a more recent spectrogram covering the 48 kHz range later, = when time and local QRM permits. 73, Wolf . ------=_NextPart_000_004C_01CCDDF9.4526D5F0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Hi Doug,
 
you could probably have heard the = Omega's=20 without the amplifier. One of the fascinating = radio experiences=20 was when Geri DK8KW and I heard crisp 11.9 kHz dashes from = Alpha=20 Krasnodar on a headphone connected to the LF = antenna, =20 using only a line-output transformer tuned to resonance, and nothing = else=20 inbetween. This was the same little backyard Marconi I = still use=20 today (measured (in-)efficiency about -70 dB at 9 kHz), and an = average=20 cheap "walkman" type headset.
 
Well that was a dozen years ago. = Guess I'll=20 have to repeat the experiment to see if I can still do it now, at = age=20 53 ;-) Ah, this must be the reason why we men need higher = antennas as=20 we grow old ;-) 
 
Good luck for your VLF = work!
 
Best wishes,
Markus (DF6NM)
 

From: = Douglas D. Williams =
Sent: Saturday, January 28, 2012 4:18=20 PM
To: rsgb_lf_group@blacksheep.org=20
Subject: Re: LF: VLF this morning in=20 TN

Thank you Wolf. Those are nice captures = for=20 comparison. I see you have no trouble receiving NAA, but the other two=20 continental U.S. stations are much weaker.
 
The alpha stations are difficult for me = to copy=20 with the sound card, but I can often hear them at night using my R75 and = upconverter with the 250Hz CW filter.
 
The OMEGA system, when it was still = active, put out=20 some very strong signals here. All one really needed to hear those was = an audio=20 amp, short whip antenna, and headphones.....and sufficiently sensitive = hearing.=20
 
I find that when I listen to some of = the live=20 streaming "natural radio" receivers in Europe, I can hear the Alphas in = my right=20 ear, but not my left ear. Guess my high frequency hearing is starting to = go.
 
Doug - KB4OER

On Sat, Jan 28, = 2012 at 9:31 AM,=20 wolf_dl4yhf <dl4yhf@freenet.de>=20 wrote:
Hi Douglas,

Nice reception there. For = comparison, I=20 have made these broadband VLF screenshots in the = past:

http://www.qsl.net/dl4yhf/vlf_rdf/latest_vlf_spectra.htm<= /FONT>

Will add a more recent spectrogram covering the = 48 kHz range=20 later, when time and local QRM permits.

73,
  Wolf = .
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