Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by klubnl.pl (8.14.4/8.14.4/Debian-8+deb8u2) with ESMTP id v9RKqdrD031764 for ; Fri, 27 Oct 2017 22:52:40 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1e8BQU-00014H-TN for rs_out_1@blacksheep.org; Fri, 27 Oct 2017 21:40:22 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1e8BQS-000148-JL for rsgb_lf_group@blacksheep.org; Fri, 27 Oct 2017 21:40:20 +0100 Received: from omr-a018e.mx.aol.com ([204.29.186.64]) by relay1.thorcom.net with esmtps (TLSv1:DHE-RSA-AES256-SHA:256) (Exim 4.89) (envelope-from ) id 1e8BQP-00082W-42 for rsgb_lf_group@blacksheep.org; Fri, 27 Oct 2017 21:40:19 +0100 Received: from mtaomg-aan01.mx.aol.com (mtaomg-aan01.mx.aol.com [172.27.19.79]) by omr-a018e.mx.aol.com (Outbound Mail Relay) with ESMTP id D376A3800194 for ; Fri, 27 Oct 2017 16:40:14 -0400 (EDT) Received: from core-ace10b.mail.aol.com (core-ace10.mail.aol.com [172.27.23.10]) by mtaomg-aan01.mx.aol.com (OMAG/Core Interface) with ESMTP id B721438000081 for ; Fri, 27 Oct 2017 16:40:12 -0400 (EDT) Received: from 188.192.44.165 by webjas-vae205.srv.aolmail.net (10.96.23.208) with HTTP (WebMailUI); Fri, 27 Oct 2017 16:40:11 -0400 Date: Fri, 27 Oct 2017 16:40:12 -0400 From: Markus Vester To: rsgb_lf_group@blacksheep.org Message-Id: <15f5f90458a-c0c-16ed0@webjas-vae205.srv.aolmail.net> In-Reply-To: <59F37FB4.1080505@posteo.de> MIME-Version: 1.0 X-MB-Message-Source: WebUI X-MB-Message-Type: User X-Mailer: JAS STD X-Originating-IP: [188.192.44.165] x-aol-global-disposition: G DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mx.aol.com; s=20150623; t=1509136813; bh=Ma5WZLKcu656Zf/XGnIulHrSiA81Mrt8I73BBLcfqJo=; h=From:To:Subject:Message-Id:Date:MIME-Version:Content-Type; b=Nw1G0t0CCqSPMXadaRBpb9YqIcoLTSKcAcZgtG3P1hlj1rrywzceAUYJcXHAWq1az HeJZ7ehLEVkdyy8yLDmSNDJgb+iX6a34lj7vVRxyr6FdAt9MNYn20fk1/bGQqkOD8J ygqcelN+Huwl6EkrD8yDT5ON2Qn1205DXZ/fzQHY= x-aol-sid: 3039ac1b134f59f399ac22aa X-Spam-Score: 0.0 (/) X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has NOT identified this incoming email as spam. The original message has been attached to this so you can view it or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: Hi Stefan, with three carriers, you can minimize the peak-to-average ratio by optimizing relative phases. When all three are in equi-phase, the maximum voltage will be 3 times that of a single carrier (+9.54 dB). Shifting the central carrier by 90° will bring that down to sqrt(5) = 6.99 dB. Thus at same given PEP, 2.55 dB can be gained. [...] Content analysis details: (0.0 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (markusvester[at]aol.com) -0.0 RP_MATCHES_RCVD Envelope sender domain matches handover relay domain 0.0 HTML_MESSAGE BODY: HTML included in message 0.0 T_DKIM_INVALID DKIM-Signature header exists but is not valid X-Scan-Signature: 0cdfd8d5ce44f1724c623c4ac9f44df6 Subject: Re: VLF: 3 carriers near 5170 Hz Content-Type: multipart/alternative; boundary="----=_Part_118350_462403864.1509136811401" 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 ------=_Part_118350_462403864.1509136811401 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Hi Stefan, with three carriers, you can minimize the peak-to-average ratio by optimizi= ng relative phases. When all three are in equi-phase, the maximum voltage w= ill be 3 times that of a single carrier (+9.54 dB). Shifting the central ca= rrier by 90=C2=B0 will bring that down to sqrt(5) =3D 6.99 dB. Thus at same= given PEP, 2.55 dB can be gained. No idea why the middle line could have split up. Best 73, Markus =20 =20 -----Urspr=C3=BCngliche Mitteilung-----=20 Von: DK7FC An: rsgb_lf_group Verschickt: Fr, 27. Okt 2017 20:51 Betreff: Re: VLF: 3 carriers near 5170 Hz Hi Paul, oops, that is strange. Maybe the PA is a bit nonlinear (slightly=20 clipping) and the measurement is mixed up. I will try to solve that. Well the difference between 5090 and 5170 seems not to be very much. Would it makes sense to repeat the experiment? Tomorrow i could run it=20 for a longer time, e.g. 6 hours. Then there should be usable values on=20 each antenna and frequency. 73, Stefan Am 27.10.2017 20:03, schrieb Paul Nicholson: > > Stefan wrote: > > > Since 13:20 UTC im running 120 mA on 3 individual frequencies: > > 5090.005 Hz | 5130.005 Hz | 5170.005 Hz > > > Carriers stopped at 16:20 UTC.... > > Received in 92.6uHz > > H-field (new) E-field > 5090.005: 9.3 dB 10.38 dB > > 5130.005: N/A See below > > 5170.005: N/A 10.2 dB > > N/A where the signal is too weak to measure. > > Something wrong with 5130.005, here's the E-field spectrum > > http://abelian.org/vlf/tmp/171027a.gif > > --=20 > Paul Nicholson > --=20 > ------=_Part_118350_462403864.1509136811401 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable

Hi Stefan,

with three= carriers, you can minimize the peak-to-average ratio by optimizi= ng relative phases. When all three are in equi-phase, the maximum voltage w= ill be 3 times that of a single carrier (+9.54 dB). Shifting the centr= al carrier by 90=C2=B0 will bring that down to sqrt(5) =3D 6.99 d= B. Thus at same given PEP, 2.55 dB can be gained.

No idea why t= he middle line could have split up.

Best 73,
Markus&nbs= p; 
  


-----Urspr=C3= =BCngliche Mitteilung-----
Von: DK7FC <selberdenken@post= eo.de>
An: rsgb_lf_group <rsgb_lf_group@blacksheep.org= >
Verschickt: Fr, 27. Okt 2017 20:51
Betre= ff: Re: VLF: 3 carriers near 5170 Hz

H= i Paul,

oops, that is strange. Maybe the PA = is a bit nonlinear (slightly
clipping) and the measurement = is mixed up. I will try to solve that.
Well the difference b= etween 5090 and 5170 seems not to be very much.
Would it mak= es sense to repeat the experiment? Tomorrow i could run it
= for a longer time, e.g. 6 hours. Then there should be usable values on
each antenna and frequency.

73, = Stefan

Am 27.10.2017 20:03, schrieb Paul Nic= holson:
>
> Stefan wrote:
>
> > Since 13:20 UTC im running 120 mA on 3 indi= vidual frequencies:
> > 5090.005 Hz | 5130.005 = Hz | 5170.005 Hz
>
> > Carrier= s stopped at 16:20 UTC....
>
> Received= in 92.6uHz
>
> H-field (= new) E-field
> 5090.005: 9.3 dB 10.38 dB
>
> 5130.005: N/A See below
>
> 5170.005: N/A 10.2 dB
>
> N/A where the signal is too weak to measu= re.
>
> Something wrong with 5130.005, = here's the E-field spectrum
>
> = http://abelian.org/vlf/tmp/171027a.gif
>
> --
> Paul Nicholson
> --
>

------=_Part_118350_462403864.1509136811401--