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 w98G3UWE012135 for ; Mon, 8 Oct 2018 18:03:31 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1g9XlS-0003nH-MF for rs_out_1@blacksheep.org; Mon, 08 Oct 2018 16:48:10 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1g9Xj8-0003ms-KK for rsgb_lf_group@blacksheep.org; Mon, 08 Oct 2018 16:45:46 +0100 Received: from resqmta-ch2-02v.sys.comcast.net ([2001:558:fe21:29:69:252:207:34]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.91_59-0488984) (envelope-from ) id 1g9Xj4-0002yn-Ut for rsgb_lf_group@blacksheep.org; Mon, 08 Oct 2018 16:45:44 +0100 Received: from resomta-ch2-01v.sys.comcast.net ([69.252.207.97]) by resqmta-ch2-02v.sys.comcast.net with ESMTP id 9WqcgBv5pcoSu9Xiyg6e4R; Mon, 08 Oct 2018 15:45:36 +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=1539013536; bh=tMucao318pY2CBQyjH5WGCNbarXkiLfh60+gr8Mgnb0=; h=Received:Received:From:To:Subject:Date:Message-ID:MIME-Version: Content-Type; b=RgtIhxC4uGrbirEKUlpibsT33CmAywEX8bzVATkG0zNLRkIKmlcknqRHIgfZXNsL3 VrMtGT0zEhhot+1zu40pJY7dbJuTs0GKaohBHFf2szqwJcBNyhLzppOLfZ9jCcwE33 E77Lvnc2PcC4FCWp8xkmbF7vdKaQ+GAWUV1C5FAxNrgdpvZOB5n5St434FTUMBl42d Ia2p39fSTq2YzTTnfguQ3JILeBiGwy+4QLH8X1slU6E/ljwbYwLPGbsSNKwzXtyVyg 5mbVols5ZE8WMyTKzvxB1puWfuMd/CvuM5VWd9lWYPp8KWbv+mherF40DX2t2APlYx F2aiVyUAIRr3w== Received: from Owner ([IPv6:2601:140:8500:7f9f:78f6:dd:b547:d008]) by resomta-ch2-01v.sys.comcast.net with ESMTPA id 9XiugRzXoDPcY9Xivgq8z1; Mon, 08 Oct 2018 15:45:34 +0000 From: To: References: <898083925.5804876.1538944165015.ref@mail.yahoo.com> <898083925.5804876.1538944165015@mail.yahoo.com> In-Reply-To: <898083925.5804876.1538944165015@mail.yahoo.com> Date: Mon, 8 Oct 2018 11:45:21 -0400 Message-ID: <014e01d45f1d$f25b3160$d7119420$@comcast.net> MIME-Version: 1.0 X-Mailer: Microsoft Outlook 14.0 Thread-Index: AQK8BR4I4cf/aZ8vs48O7BTyYpOYNAFifoBnozrnjVA= Content-Language: en-us X-CMAE-Envelope: MS4wfPc84I3cQpzgjWOqiHiEPh8GdT3vrl8eQSIooJZMUdCPFttnKgWJYFlmu6SiT8cfFuyYTiUMG9Vulae4mGtqMGbSehkwYtqNB+OkVJxPu6kSl4m9vrhS 1jd4gh2J1vUaQ3fdYm7J9qqlmiO2uY9zQSDUFYZwqZE9H+BlMUkExG7Zu201SoK5afQevkGcuN402FlUQMiFi3fxg56aqZhDyF7eIakYwY/dhi/bvVi6eeO3 X-Spam-Score: -0.7 (/) 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 @@CONTACT_ADDRESS@@ for details. Content preview: “…stabilized using an external PLL…” Markus, that’s a really interesting idea. I wonder how well the conducted spectrum of an open-air arc could be managed by a few digitally controlled loops and all-analog electronics, controlling some of these: trigger rise/fall/delay, sustain rise/fall/delay, ion shaping solenoids/deflectors. In other words, using digital control loops to allow the arc to be the only hardware power switch, with analog hardware performing temporal and spatial shaping of electron and ion currents (in wire and air), for a “green” arc and spectrum*. [...] Content analysis details: (-0.7 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.7 RCVD_IN_DNSWL_LOW RBL: Sender listed at http://www.dnswl.org/, low trust [2001:558:fe21:29:69:252:207:34 listed in] [list.dnswl.org] 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (hvanesce[at]comcast.net) -0.0 SPF_PASS SPF: sender matches SPF record -0.0 T_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: 64bc660a83b79b15f4c44d2b2147e02d Subject: LF: RE: Poulsen Arc? Content-Type: multipart/alternative; boundary="----=_NextPart_000_014F_01D45EFC.6B4A2DA0" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: * X-Spam-Status: No, hits=1.1 required=5.0 tests=HTML_30_40,HTML_MESSAGE, NO_REAL_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 This is a multipart message in MIME format. ------=_NextPart_000_014F_01D45EFC.6B4A2DA0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable =E2=80=9C=E2=80=A6stabilized using an external PLL=E2=80=A6=E2=80=9D =20 Markus, that=E2=80=99s a really interesting idea. =20 I wonder how well the conducted spectrum of an open-air arc could be = managed by a few digitally controlled loops and all-analog electronics, = controlling some of these: trigger rise/fall/delay, sustain = rise/fall/delay, ion shaping solenoids/deflectors. In other words, using = digital control loops to allow the arc to be the only hardware power = switch, with analog hardware performing temporal and spatial shaping of = electron and ion currents (in wire and air), for a = =E2=80=9Cgreen=E2=80=9D arc and spectrum*.=20 =20 Looking at dusty 1935 and 1952 copies of Miller (cold cathode etc.) and = J. Dance =E2=80=9967 (cold cathode), and thinking that digital control = loops could leverage 80-some years of cold cathode plasma science for a = fun open-air clean-arc QRP transmitter design, based on your intriguing = thought of using a loop to manage things surgically. =20 Shaping a graphite anode and cathode with shop tools could help with = spectrum-friendly electrodynamics.=20 =20 Bandwidths of tiny high voltage power supplies for electric field = shaping are suitable for the above (bandwidth even less of a problem for = magnetic-field shaping supplies). =20 In any case, stabilizing using an external PLL is a cool idea for cold = cathodes and would be a fun project. =20 =20 73, Jim AA5BW *especially green from a thermal and EMI standpoint if a loose = surrounding mesh returns out-of-band fields to the power supply = =E2=80=93 even optical return using optical integrating hemispheres with = ports for airflow =20 =20 From: owner-rsgb_lf_group@blacksheep.org = [mailto:owner-rsgb_lf_group@blacksheep.org] On Behalf Of Markus Vester Sent: Sunday, October 7, 2018 4:29 PM To: rsgb_lf_group@blacksheep.org Subject: LF: Poulsen Arc? =20 Apropos spark: Has anyone attempted to bring a homemade Poulsen arc = transmitter on air in the amateur band?=20 https://pe2bz.philpem.me.uk/Comm/-%20ELF-VLF/-%20Info/-%20History/Poulsen= ArcOscillator/poulsen1.htm Sounds like fun ;-) Could such a beast be stabilized using an external = PLL? Best 73, Markus (DF6NM) ------=_NextPart_000_014F_01D45EFC.6B4A2DA0 Content-Type: text/html; charset="utf-8" Content-Transfer-Encoding: quoted-printable

=E2=80=9C=E2=80=A6s= tabilized using an external = PLL=E2=80=A6=E2=80=9D

 

Markus, = that=E2=80=99s a really interesting idea.

 

I wonder how = well the conducted spectrum of an open-air arc could be managed by a few = digitally controlled loops and all-analog electronics, controlling some = of these: trigger rise/fall/delay, sustain rise/fall/delay, ion shaping = solenoids/deflectors. In other words, using digital control loops to = allow the arc to be the only hardware power switch, with analog hardware = performing temporal and spatial shaping of electron and ion currents (in = wire and air), for a =E2=80=9Cgreen=E2=80=9D arc and spectrum*. =

 

Looking at dusty 1935 and 1952 copies of Miller (cold = cathode etc.) and J. Dance =E2=80=9967 (cold cathode), and thinking that = digital control loops could leverage 80-some years of cold cathode = plasma science for a fun open-air clean-arc QRP transmitter design, = based on your intriguing thought of using a loop to manage things = surgically.

 

Shaping a graphite anode and cathode with shop tools = could help with spectrum-friendly electrodynamics.

 

Bandwidths = of tiny high voltage power supplies for electric field shaping are = suitable for the above (bandwidth even less of a problem for = magnetic-field shaping supplies).

 

In any case, = stabilizing using an external PLL is a cool idea for cold cathodes and = would be a fun project. =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0

 

73, Jim = AA5BW

*especially green from a = thermal and EMI standpoint if a loose surrounding mesh returns = out-of-band fields to the power supply =E2=80=93 even optical return = using optical integrating hemispheres with ports for airflow = =C2=A0

=C2=A0=C2=A0=C2=A0=C2=A0

From:= = owner-rsgb_lf_group@blacksheep.org = [mailto:owner-rsgb_lf_group@blacksheep.org] On Behalf Of Markus = Vester
Sent: Sunday, October 7, 2018 4:29 PM
To: = rsgb_lf_group@blacksheep.org
Subject: LF: Poulsen = Arc?

 

A= propos spark: Has anyone attempted to bring a homemade Poulsen arc = transmitter on air in the amateur band?

https://pe2bz.philpem.me.uk/Comm/-%20= ELF-VLF/-%20Info/-%20History/PoulsenArcOscillator/poulsen1.htm
Sounds like fun ;-) Could such a beast be stabilized using an = external PLL?

Best 73,
Markus = (DF6NM)

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