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 x2I2xmP7022829 for ; Mon, 18 Mar 2019 03:59:55 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1h5iOY-00085K-0k for rs_out_1@blacksheep.org; Mon, 18 Mar 2019 02:52:58 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1h5iM1-000859-UJ for rsgb_lf_group@blacksheep.org; Mon, 18 Mar 2019 02:50:21 +0000 Received: from outbound-mail02.vgs.untd.com ([64.136.55.36]) by relay1.thorcom.net with smtp (Exim 4.91) (envelope-from ) id 1h5iLx-00088P-M7 for rsgb_lf_group@blacksheep.org; Mon, 18 Mar 2019 02:50:18 +0000 X-DKIM-Result: Domain=juno.com Result=Signature OK DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=juno.com; s=alpha; t=1552877412; bh=47DEQpj8HBSa+/TImW+5JCeuQeRkm5NMpJWZG3hSuFU=; l=0; h=To:Date:Subject:Content-Type:From:Message-Id; b=hk5Ckn+HMrvKtChH/7k8miJ+mjgT0OxuH7mTpBZqM8lV2iVt2k8gsrUaZBbbgqQC4 GzJogyS7SrWewhBuaK0X7k6XoVoepMnuPQSK5sg3BI8x7UHnsm39Cj96V0ck+SNlPn ZRSbw4nLRdaPKjmT10+ycqMgJpr8YiLtTBr9ePpg= Received: from outbound-bu1.vgs.untd.com (mailpop09.vgs.untd.com [10.181.45.29]) by smtpout01.vgs.untd.com with SMTP id AABQJ8B4GAEYKTJ2 for (sender ); Sun, 17 Mar 2019 19:49:42 -0700 (PDT) To: rsgb_lf_group@blacksheep.org Date: Sun, 17 Mar 2019 22:48:01 -0400 X-Mailer: Email Client 8.8.1 MIME-Version: 1.0 X-Juno-Line-Breaks: 7-6,8-18,20,24-35,37-40,42-44,47-48,56-57,62-79,84-87,88-32767 X-Originating-IP: [72.70.191.203] From: Message-Id: X-UNTD-BPF: 460c0c712d042de54d11214d0d817140004d11452d208df595ed95005495318939a979e1b579708d1df9b05024a4e1a599ddd599d4b0a4f50dd5c154943ded94505555cdfd5165fd1005855160 X-UNTD-BodySize: 8783 X-ContentStamp: 22:11:202225864 X-MAIL-INFO:46c19599cd65e4414455e4e454c551c9006480ad71d1ddfd74a090f0808de53d29d960d1f025692d70e90d0cb4c965bd45f50d614930812d11548de189514d5430f53191899554b0411d5079f4b12131d1f460091db02dcd2494dd99fdd9cdfd X-UNTD-OriginStamp: yokUgcxCbtTP7XLrpefewOGLQrn5LpbHPwEmHyTiNw7WHvyW4hfHmQ== X-UNTD-Peer-Info: 10.181.45.29|mailpop09.vgs.untd.com|outbound-bu1.vgs.untd.com|riese-k3djc@juno.com 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 the administrator of that system for details. Content preview: wow I have no idea,,, probably 15 yr ago,,, iron filings on one side and nickle on the other,,, dont remember what I used of for the center did operate using the spark from an old furnace ignition tra [...] 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 [64.136.55.36 listed in list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (riese-k3djc[at]juno.com) 0.0 HTML_MESSAGE BODY: HTML included in message X-Scan-Signature: 8d5e679c4ecb21aeba32cebcefaae7cb Subject: Re: LF: 160 years of Popov birthday Content-Type: multipart/alternative; boundary=--__JNP_000_750c.717d.4427 X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: *** X-Spam-Status: No, hits=3.8 required=5.0 tests=FORGED_JUNO_RCVD,HTML_20_30, HTML_FONTCOLOR_UNKNOWN,HTML_FONTCOLOR_UNSAFE,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 message is in MIME format. Since your mail reader does not understand this format, some or all of this message may not be legible. ----__JNP_000_750c.717d.4427 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit wow I have no idea,,, probably 15 yr ago,,, iron filings on one side and nickle on the other,,, dont remember what I used of for the center did operate using the spark from an old furnace ignition transformer played with pressure on the filings , Quantity etc used a fuze with the inside cleansed out,,,, was a long weekend lots of goog;e info Bob K3DJC On Mon, 18 Mar 2019 00:04:58 +0000 (UTC) James Hollander writes: Hi Bob, what was the RF current threshold on your coherer? I'm wondering if a virtualized coherer using the coherer principle could lower the threshold and respond quicker compared to a state of the art hardware coherer. Congratulations and thanks for your email! 73, Jim H W5EST -----Original Message----- From: riese-k3djc To: rsgb_lf_group Sent: Sun, Mar 17, 2019 6:39 pm Subject: Re: LF: 160 years of Popov birthday why not build one,, i did several years ago,, took a lot of RF to activate but it worked Bob K3DJC On Sun, 17 Mar 2019 22:02:36 +0000 (UTC) James Hollander writes: Hi Roman, Yes, I wonder how to do it in software. As you know, a coherer has a large number of particles that statistically become more closely packed and connective in response to RF voltage or current applied to them. Since software defined radios have replaced many functions in short wave receivers with software on a computer, why not envisage some software virtualization of the coherer. We've been trained to think a coherer is a quaint relic of the first days of radio. But what truly are the performance limits of the coherer in principle and what improvements starting from the coherer concept might actualize advances or technological alternatives in radio? Perhaps ultimately the answer is "None", but has the question even been probed. I recognize most of us may not be in a position to inquire into the matter, but I want to put the topic forward. If there's any group that includes someone with the background and interests to potentially think through this software challenge, they're probably in this LF/VLF/ULF/SLF/ELF group now or in the future! TU & 73, Jim H W5EST -----Original Message----- From: Roman To: rsgb_lf_group Sent: Sun, Mar 17, 2019 7:34 am Subject: Re: LF: 160 years of Popov birthday Hi Jim! PSE more info about your software, OM! VY interesting. > FB, Roman. BTW, I've wondered how one could write radio detection software to act like a coherer and improve upon its principle. The software would be a "swarm detector" working on the collective interaction of many elemental pieces or software elements. 73, Jim H W5EST -- 73! Roman, RW3ADB ----__JNP_000_750c.717d.4427 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable =EF=BB=BF
wow I  have no idea,,, probably 15 yr ago,,, iron filings on one = side=20 and nickle on the other,,, dont remember what
I used of for the center
did operate using the spark from an old furnace ignition transformer
played with pressure on the filings , Quantity etc
used a fuze with the inside cleansed out,,,, was a long weekend
lots of goog;e info
 
 
Bob K3DJC
 
 
On Mon, 18 Mar 2019 00:04:58 +0000 (UTC) James Hollander <mrsocion@aol.com> writes:
Hi Bob,  what was the RF current threshold on your=20 coherer?  I'm wondering if a virtualized coherer using the = coherer=20 principle could lower the threshold and respond quicker compared to = a=20 state of the art hardware coherer. 
           &= nbsp;Congratulations=20 and thanks for your email!
73,  Jim H   W5EST 
 
 
---= --Original=20 Message-----
From: riese-k3djc <riese-k3djc@juno.com>
To:=20 rsgb_lf_group <rsgb_lf_group@blacksheep.org>
Sent: Sun, Mar 17, = 2019=20 6:39 pm
Subject: Re: LF: 160 years of Popov birthday

<= /FONT>
why not build one,, i  did several years ago,, took a lot of RF= to=20 activate but it worked
 
Bob K3DJC
 
On Sun, 17 Mar 2019 22:02:36 +0000 (UTC) James Hollander <mrsocion@aol.com&= gt;=20 writes:
Hi Roman,  
 
Yes, I wonder how to do it in software.  As you know, a = coherer=20 has a large number of particles that statistically become more = closely=20 packed and connective in response to RF voltage or current applied= to=20 them.  
 
Since software defined radios have replaced many functions in = short=20 wave receivers with software on a computer, why not envisage some = software=20 virtualization of the coherer.  We've been trained to think a = coherer=20 is a quaint relic of the first days of radio.   But what = truly are=20 the performance limits of the coherer in principle and what = improvements=20 starting from the coherer concept might actualize advances or = technological=20 alternatives in radio?   Perhaps ultimately the = answer=20 is "None",  but has  the question even been probed.
 
I recognize most of us may not be in a position to inquire into = the=20 matter, but I want to put the topic forward.   If there's any= =20 group that includes someone with the background and=20 interests to potentially think through this software=20 challenge, they're probably in this LF/VLF/ULF/SLF/ELF = group=20 now or in the future!
 
TU & 73, Jim H    W5EST 
 
 
= -----Original=20 Message-----
From: Roman <rw3adb@YANDEX.ru>To: rsgb_lf_group <rsgb_lf_group@blacksheep.org>Sent: Sun, Mar 17, 2019 7:34 am
Subject: = Re: LF:=20 160 years of Popov birthday

Hi Jim!

PSE more info = about your=20 software, OM!
VY interesting.=20
<= BR=20 clear=3Dnone>
> FB, Roman. BTW, I've wondered how = one could=20 write radio detection software to act like a coherer and improve upon = its=20 principle. The software would be a "swarm detector" working on the=20 collective interaction of many elemental pieces or software elements. = 73,=20 Jim H W5EST
--
73!

Roman,=20 RW3ADB=20
<= BR=20 clear=3Dnone>
 
 
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