Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=0.0 required=5.0 tests=FREEMAIL_FORGED_FROMDOMAIN, FREEMAIL_FROM,HEADER_FROM_DIFFERENT_DOMAINS,HTML_MESSAGE,SPF_PASS, T_DKIM_INVALID,T_KAM_HTML_FONT_INVALID,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 X-Spam-DCC: EATSERVER: mailn 1166; Body=2 Fuz1=2 Fuz2=2 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by lipkowski.org (8.14.4/8.14.4/Debian-8+deb8u2) with ESMTP id v7DMfrga015379 for ; Mon, 14 Aug 2017 00:41:54 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1dh1VP-0003A2-Lr for rs_out_1@blacksheep.org; Sun, 13 Aug 2017 23:37:11 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1dh1VO-00039k-VW for rsgb_lf_group@blacksheep.org; Sun, 13 Aug 2017 23:37:10 +0100 Received: from resqmta-ch2-03v.sys.comcast.net ([2001:558:fe21:29:69:252:207:35]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.89) (envelope-from ) id 1dh1VL-0001V3-HS for rsgb_lf_group@blacksheep.org; Sun, 13 Aug 2017 23:37:09 +0100 Received: from resomta-ch2-01v.sys.comcast.net ([69.252.207.97]) by resqmta-ch2-03v.sys.comcast.net with ESMTP id h1UedNBTEdtjeh1VHdAcaV; Sun, 13 Aug 2017 22:37:03 +0000 X-DKIM-Result: Domain=comcast.net Result=Signature OK DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=comcast.net; s=q20161114; t=1502663823; bh=Cec64vpmm3D4JdUL5gqlQ0UZcuxakc8bLzOh/9hhMog=; h=Received:Received:From:To:Subject:Date:Message-ID:MIME-Version: Content-Type; b=kYFzRtyIOJvJzEs9zY2XQWaCNSrMJN9cIs4gPeX82Wxn10uocHlWH+PKdqS5yXzT/ O9qabIKV3YTEerqutMaTHyMmE0eD23wAL3eKVW9yGx/n6rRVGvGI8F9FW3Sofjz5/5 3CQR1ubi0EHcpUnceEbv+MVip4Tg+vxzbsfxfy/oeTKsohJjhicvs0BJJPaka80bSf J+ctrNJQVXfEuScI1/2kgAf7dbp+1oTNduncGhIoBitLKuVcvl8zk7VLMN2xRNSLLh Di+UBtjoFdXiBFGZhV2BefEcmuHG+T4+g1KdOF4m/NUVj3aiuSjOVL3Geif2pZ1FDN hUeWk9+oi59Qg== Received: from Owner ([IPv6:2601:140:8500:7f9f:78f6:dd:b547:d008]) by resomta-ch2-01v.sys.comcast.net with SMTP id h1VEdmKdinljoh1VFdVK8V; Sun, 13 Aug 2017 22:37:02 +0000 From: To: References: <15dd846ba8e-2e05-13131@webprd-a53.mail.aol.com> <5990112D.3030503@posteo.de> <023301d31444$cdeba320$69c2e960$@comcast.net> <5990B3F3.9060502@posteo.de> In-Reply-To: <5990B3F3.9060502@posteo.de> Date: Sun, 13 Aug 2017 18:36:59 -0400 Message-ID: <029a01d31484$adeb1660$09c14320$@comcast.net> MIME-Version: 1.0 X-Mailer: Microsoft Outlook 14.0 Thread-Index: AQFw2azIhOrT+QC+OQYFkWA1DEeIfQI8qOTIAkYufsYBr47djKMVrfMw Content-Language: en-us X-CMAE-Envelope: MS4wfDcc49uufyL3Ahx1hORHlfh4CrqcedjP8uj//I0VNK/MU6gTTsTcgAeOMuxmMQwrpVM6XNtpecjTWneLfoU4nUtrQR/9fZseMvvv35HLCyPnygxAmSM2 TSOxLssG717C/dmLB/EMTyCVzMXMdAGwCrY= X-Scan-Signature: e7c02b6e85723bae4746298f7f529717 Subject: RE: VLF: Carrier on 3675.005 Hz / EbNaut - YES Content-Type: multipart/alternative; boundary="----=_NextPart_000_029B_01D31463.26D97660" 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-Scanned-By: MIMEDefang 2.75 Status: RO X-Status: X-Keywords: X-UID: 12382 This is a multipart message in MIME format. ------=_NextPart_000_029B_01D31463.26D97660 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Stefan, =20 You mentioned =E2=80=9Cdifferent coil concept=E2=80=9D for more power. = I=E2=80=99m doubting that any of the following are desirable but I = thought I=E2=80=99d mention them in case one them prompts an = actually-good idea: a) A hermetic shell made by filling a 1/4" space between cylinders with = temperature-cured hard-epoxy; pressurized. Very dry, and better position = on the Paschen pressure/voltage breakdown curve. b) Using higher permeability lower-loss Metglas cores* to allow spaced = turns, which would reduce proximity loss (and associated voltage); and = to allow thicker wire (lower loss-voltage). * (I bought some Metglas AMCC4 and AMCC-1SX cores at low cost from = a surplus supplier; haven=E2=80=99t tested them yet) =20 c) Using one or more series capacitors in the coil = (-5j,+5j,-5j,+5j,-5j,+5j=E2=80=A6 fun to think about, perhaps a = practical nightmare even with CW, but HV balanced stacking is much = better than it used to be. Seems good for a high-current resonant = small-loop antenna but even in that case unwieldy for QSY) =20 73, =20 Jim AA5BW=20 =20 =20 =20 From: owner-rsgb_lf_group@blacksheep.org = [mailto:owner-rsgb_lf_group@blacksheep.org] On Behalf Of DK7FC Sent: Sunday, August 13, 2017 4:18 PM To: rsgb_lf_group@blacksheep.org Subject: Re: VLF: Carrier on 3675.005 Hz / EbNaut - YES =20 Hi VLF,=20 The repetition of yesterdays message failed. At 15:38 UTC the safety = function tripped. I've just been on the roof, when re-starting the = transmission i can see a spark in the center of one of the stacks. So = now there is another one which has a flash over! :-( It must be replaced, which is a lot of work. So the tranmissions on 3675 = Hz will stopp for some time. At least we have some carrier detections = and even EbNaut decodes. I need to think about a different coil concept.... More current, more = voltage, more power, more more more! Am 13.08.2017 16:57, schrieb hvanesce@comcast.net:=20 Stephan wrote: =E2=80=9CThe phase of that best decode is quite varying=E2=80=9D Is that observation based on the attached EbNaut Decoder window image = from Markus? It is just based on that decoder data. It is not really proof, just an = idea. Would it help to have an FDTD diurnal phase plot for this path at = 3575Hz? For sure it would be interesting! If you like, do it. I would be curious = to see it. 73, Stefan ------=_NextPart_000_029B_01D31463.26D97660 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable

Stefan,

 

You mentioned =E2=80=9Cdifferent coil concept=E2=80=9D for more = power. I=E2=80=99m doubting that any of the following are desirable but = I thought I=E2=80=99d mention them in case one them prompts an = actually-good idea:

a) A hermetic shell made by filling a 1/4" space between = cylinders with temperature-cured hard-epoxy; pressurized. Very dry, and = better position on the Paschen pressure/voltage breakdown = curve.

b) Using higher permeability lower-loss Metglas cores* to allow = spaced turns, which would reduce proximity loss (and associated = voltage); and to allow thicker wire (lower = loss-voltage).

=C2=A0=C2=A0=C2=A0=C2=A0 * =C2=A0(I bought some Metglas AMCC4 and = AMCC-1SX cores at low cost from a surplus supplier; haven=E2=80=99t = tested them yet) =C2=A0=C2=A0

c) Using one or more series capacitors in the coil = (-5j,+5j,-5j,+5j,-5j,+5j=E2=80=A6=C2=A0 fun to think about, perhaps a = practical nightmare even with CW, but HV balanced stacking is much = better than it used to be. Seems good for a high-current resonant = small-loop antenna but even in that case unwieldy for = QSY)

 

73,

 

Jim AA5BW

 

 

 

From: owner-rsgb_lf_group@blacksheep.org = [mailto:owner-rsgb_lf_group@blacksheep.org] On Behalf Of = DK7FC
Sent: Sunday, August 13, 2017 4:18 PM
To: = rsgb_lf_group@blacksheep.org
Subject: Re: VLF: Carrier on = 3675.005 Hz / EbNaut - YES

 

Hi VLF, =

The repetition of yesterdays message failed. At 15:38 UTC the = safety function tripped. I've just been on the roof, when re-starting = the transmission i can see a spark in the center of one of the stacks. = So now there is another one which has a flash over! :-(
It must be = replaced, which is a lot of work. So the tranmissions on 3675 Hz will = stopp for some time. At least we have some carrier detections and even = EbNaut decodes.

I need to think about a different coil = concept.... More current, more voltage, more power, more more = more!

Am 13.08.2017 16:57, schrieb hvanesce@comcast.net: =

Stephan wrote:

=E2=80=9CThe phase of that best decode is quite = varying=E2=80=9D

Is that observation based on the attached EbNaut Decoder window image = from Markus?

It is just based = on that decoder data. It is not really proof, just an = idea.

Would it help to have an FDTD diurnal phase plot for this path at = 3575Hz?

For sure it would be = interesting! If you like, do it. I would be curious to see = it.

73, Stefan

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