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 wBR2ZakZ005512 for ; Thu, 27 Dec 2018 03:35:37 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1gcLT3-0000Pq-WB for rs_out_1@blacksheep.org; Thu, 27 Dec 2018 02:32:13 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1gcLT3-0000Ph-KM for rsgb_lf_group@blacksheep.org; Thu, 27 Dec 2018 02:32:13 +0000 Received: from mail-pl1-x62e.google.com ([2607:f8b0:4864:20::62e]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.91_59-0488984) (envelope-from ) id 1gcLSx-00086Z-RJ for rsgb_lf_group@blacksheep.org; Thu, 27 Dec 2018 02:32:12 +0000 Received: by mail-pl1-x62e.google.com with SMTP id t13so8160957ply.13 for ; Wed, 26 Dec 2018 18:32:07 -0800 (PST) X-DKIM-Result: Domain=gmail.com Result=Good and Known Domain DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to; bh=R3pNRMgOme7e2gZYAUe2HF0MOmcfAxcssr7XDC9wphI=; b=n1ih7bEQRBExB57NG46fpK6C7+KxtwIc1LoU0hBL/E6eO1shudZnAMGoU8qOx+eb6q eXgZbZMzfl8yexMuJt3hw8atDJYno6fGY3QgXAg5xsvk2RNg7yW2pHW0bBuNSNc2PWfP tu51aOoNxhSypqzRAJkh6zd8/Qe3UMqGDLOlf8EnkwZ6d4rgcNXYhI5pggCjbR/sdgwH RFissTlVW/YnOl0eEm96sizobLATXXvhSFvSR7DL6QY+8KeIYNJOt9ijdRK6EtfQ7x5P kxNemdoLP9v8NrCvegx628IcNlW6owqRsrv8DsRg5s8xuMoX2Hp74fXfytMKf/bahl8H Z5CQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to; bh=R3pNRMgOme7e2gZYAUe2HF0MOmcfAxcssr7XDC9wphI=; b=oK46aRBaYas5cvWHgRVjJ7krtFmqKYQy1K1gDrzPo7HDy2qyja+OkYpTRIsXFe0xr2 j3i/1Dscztim6y0LFlKNdbY/I4pu3GQ6bJmpxwN3jO1WleO2FNPNmQDzrurC6LEj3iIt sszw9zErA9ZqTeoX+bbAsf0rGjVOq0NbJLXtKihPNivzNhHgXkS3mg+NvRG635ZlMf5H 04Z7p9CtOpFJaGteqHMXFUcLxjuRJ5ovCCe2L6j3aBAMDG5L4d7h1DPODi2gAEwfAnoU lgEF7AZOVkU2fg0M+80uQOTrIBt6MPID4sLrhM1uGX0GKY3Nl8Z0idlwi7xG5izvBunO oICQ== X-Gm-Message-State: AJcUukdrFvEcvLdAeIPHsYtdYF7/vqJBSyNZa0oA4FAf3uFzvh2wRjOd ZVDfAThsQZMakNnWIW30+df0fmxfI04rzKCXLqC3mkxR X-Google-Smtp-Source: ALg8bN5shmYa8pHintcvt8KKvksIgfMarCxWhcYM9MPVeq7vLgIPWNqKxzMvB3ETWX1J28t2LHNaIkFOXlgEKpMsB+c= X-Received: by 2002:a17:902:e18d:: with SMTP id cd13mr21988927plb.262.1545877925835; Wed, 26 Dec 2018 18:32:05 -0800 (PST) MIME-Version: 1.0 References: <5C23CB7D.2050306@posteo.de> In-Reply-To: From: Gaj Kumar Date: Thu, 27 Dec 2018 08:01:54 +0530 Message-ID: To: rsgb_lf_group@blacksheep.org X-Spam-Score: 1.6 (+) 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: Dear Jacek Thanks for the good tips . I found a local company who claimed to sell Ferrite rods He sent me these impeder cores , I stuck several of them together to make a 1 foot long ferrite tube Testing as ante [...] Content analysis details: (1.6 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [2607:f8b0:4864:20:0:0:0:62e listed in] [list.dnswl.org] 1.6 SUBJ_ALL_CAPS Subject is all capitals -0.0 SPF_PASS SPF: sender matches SPF record 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (bsgkumar[at]gmail.com) 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: 2bd5d3c3e4b1ac0d4c95b192e62a82a2 Subject: Re: LF: VU2BGS Content-Type: multipart/alternative; boundary="000000000000a2b6c8057df7c02b" 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 --000000000000a2b6c8057df7c02b Content-Type: text/plain; charset="UTF-8" Dear Jacek Thanks for the good tips . I found a local company who claimed to sell Ferrite rods He sent me these impeder cores , I stuck several of them together to make a 1 foot long ferrite tube Testing as antenna for 160m was a failure , it had very poor Q . now I am glad i can use it for 470khz or 137 khz . glad that i have now a good use . will let you the performance soon 73 Kumar VU2BGS On Thu, Dec 27, 2018 at 3:50 AM Jacek Lipkowski wrote: > Instead of ferrite rods from AM radios, search for "impeder" rods. These > are used for induction welding of pipes, and can stand high power at > hundreds of kHz. Sometimes you can get them cheap on auction sites. > > I use one to match my 40m longwire antenna on 630m. When tested on the > bench it survives 100W without problems. It also makes a nice receive > antenna (few of then can be stacked in a long tube). > > VY 73 > > Jacek / SQ5BPF > > > On Wed, 26 Dec 2018, DK7FC wrote: > > > Date: Wed, 26 Dec 2018 19:42:05 +0100 > > From: DK7FC > > Reply-To: rsgb_lf_group@blacksheep.org > > To: rsgb_lf_group@blacksheep.org > > Subject: Re: LF: VU2BGS > > > > ...I know someone who clandestinely removed the ferrite rod of a radio > of his XYL (now ex XYL) beeing able to receive the MF AM > > broadcast. Many radios, if not to modern offer 'FM/AM' radio but AM is > not used by most people. So this rod can be used to build a > > matching unit for a 630m band antenna. And of course the core material > is suitable because the antenna is used for this frequency > > range. > > However one has to take care that no local QRM sources are picked up > with a rod. This is the disadvantage relative to a toroid of > > course. So better place the core near the antenna, not into the shack. > > > > 73, Stefan > > > > Am 26.12.2018 17:03, schrieb Clemens Paul: > > > > Hi Kumar, > > > > >only the ferrites are a big problems here ! > > > > You may have a look at > > https://www.radio-store.co.uk/ > > > > They ship worldwidwe,sell also small quantities and have very > competitive prices. > > > > 73 > > Clemens > > DL4RAJ > > > > > > >-----Original Message----- > > >From: owner-rsgb_lf_group@blacksheep.org > > >[mailto:owner-rsgb_lf_group@blacksheep.org] On Behalf Of Gaj > Kumar > > >Sent: Wednesday, December 26, 2018 9:40 AM > > >To: rsgb_lf_group@blacksheep.org > > >Subject: Re: LF: VU2BGS > > > > > > --000000000000a2b6c8057df7c02b Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Dear Jacek=C2=A0

Thanks for the good ti= ps .=C2=A0
I found a local company who claimed to sell Ferrite ro= ds=C2=A0
He sent me these impeder cores , I stuck several of them= together to make a 1 foot long ferrite tube=C2=A0
Testing as ant= enna for 160m was a failure , it had very poor Q .
now I am glad = i can use it for 470khz or 137 khz .

glad that i h= ave now a good use . will let you the performance soon=C2=A0

=
73=C2=A0
Kumar=C2=A0
VU2BGS


On Thu, Dec 27, 2= 018 at 3:50 AM Jacek Lipkowski <= sq5bpf@lipkowski.org> wrote:
Instead of ferrite rods from AM radios, search for &quo= t;impeder" rods. These
are used for induction welding of pipes, and can stand high power at
hundreds of kHz. Sometimes you can get them cheap on auction sites.

I use one to match my 40m longwire antenna on 630m. When tested on the
bench it survives 100W without problems. It also makes a nice receive
antenna (few of then can be stacked in a long tube).

VY 73

Jacek / SQ5BPF


On Wed, 26 Dec 2018, DK7FC wrote:

> Date: Wed, 26 Dec 2018 19:42:05 +0100
> From: DK7FC <selberdenken@posteo.de>
> Reply-To: rsgb_lf_group@blacksheep.org
> To: = rsgb_lf_group@blacksheep.org
> Subject: Re: LF: VU2BGS
>
> ...I know someone who clandestinely removed the ferrite rod of a radio= of his XYL (now ex XYL) beeing able to receive the MF AM
> broadcast. Many radios, if not to modern offer 'FM/AM' radio b= ut AM is not used by most people. So this rod can be used to build a
> matching unit for a 630m band antenna. And of course the core material= is suitable because the antenna is used for this frequency
> range.
> However one has to take care that no local QRM sources are picked up w= ith a rod. This is the disadvantage relative to a toroid of
> course. So better place the core near the antenna, not into the shack.=
>
> 73, Stefan
>
> Am 26.12.2018 17:03, schrieb Clemens Paul:
>
>=C2=A0 =C2=A0 =C2=A0 =C2=A0Hi Kumar,
>
>=C2=A0 =C2=A0 =C2=A0 =C2=A0=C2=A0>only the ferrites are a big proble= ms here !
>
>=C2=A0 =C2=A0 =C2=A0 =C2=A0You may have a look at
>=C2=A0 =C2=A0 =C2=A0 =C2=A0https://www.radio-store.co.uk/
>
>=C2=A0 =C2=A0 =C2=A0 =C2=A0They ship worldwidwe,sell also small quantit= ies and have very competitive prices.
>
>=C2=A0 =C2=A0 =C2=A0 =C2=A073
>=C2=A0 =C2=A0 =C2=A0 =C2=A0Clemens
>=C2=A0 =C2=A0 =C2=A0 =C2=A0DL4RAJ
>=C2=A0 =C2=A0 =C2=A0 =C2=A0=C2=A0
>
>=C2=A0 =C2=A0 =C2=A0 =C2=A0>-----Original Message-----
>=C2=A0 =C2=A0 =C2=A0 =C2=A0>From: owner-rsgb_lf_group@blacksheep.org
>=C2=A0 =C2=A0 =C2=A0 =C2=A0>[mailto:owner-rsgb_lf_group@blacksheep.org<= /a>] On Behalf Of Gaj Kumar
>=C2=A0 =C2=A0 =C2=A0 =C2=A0>Sent: Wednesday, December 26, 2018 9:40 = AM
>=C2=A0 =C2=A0 =C2=A0 =C2=A0>To: rsgb_lf_group@blacksheep.org
>=C2=A0 =C2=A0 =C2=A0 =C2=A0>Subject: Re: LF: VU2BGS
>
>
>
--000000000000a2b6c8057df7c02b--