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 wBR2noNV005671 for ; Thu, 27 Dec 2018 03:49:58 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1gcLgR-0000aq-R9 for rs_out_1@blacksheep.org; Thu, 27 Dec 2018 02:46:03 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1gcLgQ-0000ah-UC for rsgb_lf_group@blacksheep.org; Thu, 27 Dec 2018 02:46:02 +0000 Received: from mail-pl1-x631.google.com ([2607:f8b0:4864:20::631]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.91_59-0488984) (envelope-from ) id 1gcLgK-00089V-KC for rsgb_lf_group@blacksheep.org; Thu, 27 Dec 2018 02:46:01 +0000 Received: by mail-pl1-x631.google.com with SMTP id y1so8176396plp.9 for ; Wed, 26 Dec 2018 18:45:56 -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=cNjpa7K/9uy6zKgHw0tlCnQvX/WUIEz2bQKQqqmwtU4=; b=rF8jKJYFFozaTjJMB7yGSVS/1PSvQ1uUwFKrzhOiWhjkjib6iBt7uibDUY1ubQx7Gu fdAA9Ia/C9U3ojgM2Q+1CBGgHCR4L0U1vyiwHkjA7NFa5Mx5lXt3EiWTXrAWfImZNwdh VjSb3qzzfaYIgPzOhNEPnZwHMlDNuVmS7IxZPowrzU4yeEqIjNXJa/ibnoF6eHx7oZ3b zZ6JgyI0lzcnTouv+EzYalarFgEBt3XeFnlA5x4MDVDtkmk0xlG0wxmJRDkB/sVM7Gwk deDMB3q/wr4wGuEITL9CFz/tkmuXrmvR0109b06ObMoPqXiHrmF6H6jsYnBS2c6vfzMi JLtA== 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=cNjpa7K/9uy6zKgHw0tlCnQvX/WUIEz2bQKQqqmwtU4=; b=Cxj+iRqcFxQaUiwMJWhGJhRi5tJY2is3ssEFo4c2OnF1/AEGLycvKCNLYkGdkxFQ9E A85keXNABYFPwE7zDsjjZXYUCU49KRdf7DAY5INEPG01xrl1wSVc0fMtRfBhhAN1GzD6 NBkeQ1mM2Bg0y89INjm6p1m6LWHmKNdNlPYQHd5nXBbzsGLhNjqO/4eGp4HpaJNvNNIA dkBQRumv+Jd97jOUULle6nNaWDWSGrm5mQI/tksix0HvaUj678G18JN01WFHFJXdDniB 8x2tcNwDlYCYEIb0gnyP65mt7kugau5ur45qkJu0WaZtyBpyZTHxDGBagRKPzzJtjLAW LUpQ== X-Gm-Message-State: AJcUukeomBTvEX2ZRBbK0DBNIRobhrrUxIf7ZAvE0eJvtemWLjqo5EyH GTC9fxgDcyE+0Ph8cYuzoFLb+GjbVXZ9cFlnY5R9lWUm X-Google-Smtp-Source: ALg8bN4eKT1L1Jz0gFjkIWfDbdOVMkpLoR7Z4COO+YuCFOwmfBT0Dw6nayOgoeVTTmr96GJfzQcxRWnmrVMb+ItvZd4= X-Received: by 2002:a17:902:4225:: with SMTP id g34mr22547404pld.152.1545878754470; Wed, 26 Dec 2018 18:45:54 -0800 (PST) MIME-Version: 1.0 References: <5C23CB7D.2050306@posteo.de> In-Reply-To: From: Gaj Kumar Date: Thu, 27 Dec 2018 08:15:43 +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: Hi Stefan Yes That is a good idea , very rarely some one listens to MW , I have a few from Philips Radios . 10 inches . But now in the market we get 2inches long which have terrible Q . We have a MW station which is on 612Khz and puts out a terrible 3rd harmonic on 1836 and covers about 30khz of noise . s9+20 now they [...] 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:f8b0:4864:20:0:0:0:631 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: cbf9d9751ac5f32708197d03fa6d8d74 Subject: Re: LF: VU2BGS Content-Type: multipart/alternative; boundary="00000000000006b0b6057df7f2f7" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.0 required=5.0 tests=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 --00000000000006b0b6057df7f2f7 Content-Type: text/plain; charset="UTF-8" Hi Stefan Yes That is a good idea , very rarely some one listens to MW , I have a few from Philips Radios . 10 inches . But now in the market we get 2inches long which have terrible Q . We have a MW station which is on 612Khz and puts out a terrible 3rd harmonic on 1836 and covers about 30khz of noise . s9+20 now they have started to Experiment on DRM on MW ,while no one listens to regular AM . This wipes out the band one hour before Sunrise , I found some toroids on Ebay a material called Rc1 gives a Q of over 1000 on MW will make the filters with it 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 > > > > > > --00000000000006b0b6057df7f2f7 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Hi Stefan=C2=A0

Yes That is a good idea= , very rarely some one listens to MW ,
I have a few from Philips= Radios . 10 inches .

But now in the market we get= 2inches long which have terrible Q .
We have a MW station which = is on 612Khz and puts out a terrible 3rd harmonic on 1836 and covers about = 30khz of noise . s9+20=C2=A0
now they have started to Experiment = on DRM on MW ,while no one listens to regular AM .=C2=A0
This wip= es out the band one hour before Sunrise=C2=A0
,
I found= some toroids on Ebay=C2=A0 a material called Rc1=C2=A0 gives a Q of over 1= 000 on MW=C2=A0
will make the filters with it=C2=A0
73=C2=A0

Kumar
VU2BGS
<= /div>
On Thu, Dec 27, 2018 a= t 3:50 AM Jacek Lipkowski <sq5bp= f@lipkowski.org> wrote:
Instead of ferrite rods from AM radios, search for "imp= eder" 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
>
>
>
--00000000000006b0b6057df7f2f7--