Return-Path: Received: from mtain-df08.r1000.mx.aol.com (mtain-df08.r1000.mx.aol.com [172.29.64.220]) by air-mb01.mail.aol.com (v129.4) with ESMTP id MAILINMB012-a0784cb0b0733cb; Sat, 09 Oct 2010 14:12:03 -0400 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-df08.r1000.mx.aol.com (Internet Inbound) with ESMTP id AF10F380000FA; Sat, 9 Oct 2010 14:12:01 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1P4ds1-000715-GN for rs_out_1@blacksheep.org; Sat, 09 Oct 2010 19:10:09 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1P4ds0-00070w-SJ for rsgb_lf_group@blacksheep.org; Sat, 09 Oct 2010 19:10:08 +0100 Received: from imr-ma05.mx.aol.com ([64.12.100.31]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1P4dry-00065i-J3 for rsgb_lf_group@blacksheep.org; Sat, 09 Oct 2010 19:10:08 +0100 Received: from mtaout-db01.r1000.mx.aol.com (mtaout-db01.r1000.mx.aol.com [172.29.51.193]) by imr-ma05.mx.aol.com (8.14.1/8.14.1) with ESMTP id o99I9p7M021069 for ; Sat, 9 Oct 2010 14:09:51 -0400 Received: from Black (nrbg-4d073ffa.pool.mediaWays.net [77.7.63.250]) by mtaout-db01.r1000.mx.aol.com (MUA/Third Party Client Interface) with ESMTPA id BF901E000091 for ; Sat, 9 Oct 2010 14:09:49 -0400 (EDT) Message-ID: From: "Markus Vester" To: References: <114D6EDF6AF54DF0A20FCDED840DDDAE@Black> <4CB096AF.6010400@iup.uni-heidelberg.de> In-Reply-To: <4CB096AF.6010400@iup.uni-heidelberg.de> Date: Sat, 9 Oct 2010 20:09:38 +0200 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Windows Mail 6.0.6000.16480 X-MimeOLE: Produced By Microsoft MimeOLE V6.0.6000.16669 X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001 Subject: Re: LF: Re: Transmitting on 8969.998 Hz Content-Type: multipart/alternative; boundary="----=_NextPart_000_000B_01CB67ED.E6DF8730" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.9 required=5.0 tests=HTML_30_40,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-sid: 3039ac1d40dc4cb0b071513a X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none ------=_NextPart_000_000B_01CB67ED.E6DF8730 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Thanks a lot Stefan for this nice confirmation! I'm quite amazed that= it did work so well. And congratulations to you - as they say, with= QRP all the hard work is being done on the receiving side! And I reca= ll our conversation not long ago, when the two of us half-jokingly cal= culated that we could probably work each other at one bit a day ;-) The amazing thing is that virtually everybody can do this. For transmi= tting, all you need is an average LF backyard marconi, or a strapped= 80 m dipole with reasonable insulation. We actually live on a fairly= small plot, and I have 42 m of wire up at about 7m effective height.= A power of 80 W gives around 0.28 A (ie. 21 kV antenna voltage). Than= ks to Spectrum Lab, accurate GPS or MSK stabilisation has become almos= t straightforward. I have stopped the transmitter now at 18:00, as I do not dare to let= it run through the night. If conditions allow, I will try to add anot= her dash tomorrow ;-) Best regards, Markus (DF6NM) ----- Original Message -----=20 From: Stefan Sch=E4fer=20 To: rsgb_lf_group@blacksheep.org=20 Cc: Paul=20 Sent: Saturday, October 09, 2010 6:22 PM Subject: Re: LF: Re: Transmitting on 8969.998 Hz Hello Markus, VLF,=20 Yes, indeed. 10 dB S/N in 47 =B5Hz :-) Unbelivable! This indicates= that your transmitter and my receiver must be quite accurate ;-) Markus, here we may achieve some very important informations: The QR= N will rise in some hours but maybe your signal level will rise too!= The maximum S/N may be achieved, as a function of daytime! I am looki= ng forward to your transmission!! Please don't stop! :-) This can be seen as a new record: The first transmission/reception= above 1 lambda (even above 5 lambda) on VLF that is generated by a fi= xed station (means not /p) .=20 You could run the carrier for days and 100 W TX power is managable.= But: Transmitting "NM" means transmitting 66 hours, without the break= es. If 1 kWh costs 0,2 Euro, you have to pay 1,33 Euro. So you should= place the coil not on your roof but directly in the kitchen to 'save'= at least the coil losses by heating your home! ;-) 73, Stefan/DK7FC Maybe Paul Nicholson can receive your signal too. I would wonder if= not! ;-) Am 09.10.2010 16:14, schrieb Markus Vester:=20 There seems to be a peak on DK7FC's grabber... ----- Original Message -----=20 From: Markus Vester=20 To: rsgb_lf_group@blacksheep.org=20 Sent: Saturday, October 09, 2010 1:21 PM Subject: LF: Transmitting on 8969.998 Hz Frequency changed to 8969.998 at 9:50, to be within Stefan's 47= uHz window. ----- Original Message -----=20 From: Markus Vester To: rsgb_lf_group@blacksheep.org Sent: Saturday, October 09, 2010 11:41 AM Subject: VLF: Transmitting on 8969.98 Since about 9:30, I am radiating a carrier on 8969.98 Hz (GPS co= ntrolled) from my home antenna, EMRP approx. 5 uW. I hope to be able= to keep it up for a few hours, despite the presence of minor partial= discharges somewhere around the house, as indicated by the noise visi= ble on the LF grabber. Best 73, Markus (DF6NM in JN59NK) ------=_NextPart_000_000B_01CB67ED.E6DF8730 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Thanks a lot Stefan for this nice con= firmation! I'm=20 quite amazed that it did work so well. And congratulations to you - as= they say,=20 with QRP all the hard work is being done on the receiving side! A= nd I=20 recall our conversation not long ago, when the two of us half-jokingly= =20 calculated that we could probably work each other at one bit a da= y=20 ;-)
 
The amazing thing is that v= irtually=20 everybody can do this. For transmitting, all you need is an average=20 LF backyard marconi, or a strapped 80 m dipole with reasonable in= sulation.=20 We actually live on a fairly small plot, and I have 42 m of wire&= nbsp;up=20 at about 7m effective height. A power of 80 W gives&nbs= p;around=20 0.28 A (ie. 21 kV antenna voltage). Thanks to Spectrum= Lab,=20 accurate GPS or MSK stabilisation has become almost=20 straightforward.
 
I have stopped the transmitter now at= 18:00, as I=20 do not dare to let it run through the night. If conditions allow, I wi= ll try to=20 add another dash tomorrow ;-)
 
Best regards,
Markus (DF6NM)
 
----- Original Message -----
Cc: Paul
Sent: Saturday, October 09,= 2010 6:22=20 PM
Subject: Re: LF: Re: Transmit= ting on=20 8969.998 Hz

Hello Markus, VLF,=

Yes,=20 indeed. 10 dB S/N in 47 =B5Hz :-) Unbelivable! This indicates that= your=20 transmitter and my receiver must be quite accurate ;-)

Markus= , here we=20 may achieve some very important informations: The QRN will rise in= some hours=20 but maybe your signal level will rise too! The maximum S/N may be ac= hieved, as=20 a function of daytime! I am looking forward to your transmission!!= Please=20 don't stop! :-)

This can be seen as a new record: The first= =20 transmission/reception above 1 lambda (even above 5 lambda) on VLF= that is=20 generated by a fixed station (means not /p) .
You could run the= carrier=20 for days and 100 W TX power is managable. But: Transmitting "NM" mea= ns=20 transmitting 66 hours, without the breakes. If 1 kWh costs 0,2 Euro,= you have=20 to pay 1,33 Euro. So you should place the coil not on your roof but= directly=20 in the kitchen to 'save' at least the coil losses by heating your ho= me!=20 ;-)

73, Stefan/DK7FC

Maybe Paul Nicholson can receive= your=20 signal too. I would wonder if not! ;-)



Am 09.10.2010= 16:14,=20 schrieb Markus Vester:=20
There seems to be a peak on&= nbsp;DK7FC's=20 grabber...
 
----- Original Message -----
From:=20 Markus Vester
Sent:=20 Saturday, October 09, 2010 1:21 PM
Subject:=20 LF: Transmitting on 8969.998 Hz

Frequency changed to 8969.998 at 9:50, to be with= in=20 Stefan's 47 uHz window.

----- Original Message -----
= From:=20 Markus Vester
To: rsgb_lf_group@blacksheep.org=
Sent: Saturday,=20 October 09, 2010 11:41 AM
Subject: VLF: Transmitting on=20 8969.98

Since about 9:30, I am radiating a carrier on 896= 9.98 Hz=20 (GPS controlled) from my home antenna, EMRP approx. 5 uW. I hope= to be=20 able to keep it up for a few hours, despite  the presence= of minor=20 partial discharges somewhere around the house, as indicated by= the noise=20 visible on the LF grabber.

Best 73,
Markus (DF6NM in= =20 JN59NK)

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