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 w6KFJBfk015755 for ; Fri, 20 Jul 2018 17:19:14 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1fgWyd-0002Hs-RH for rs_out_1@blacksheep.org; Fri, 20 Jul 2018 16:05:51 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1fgWyb-0002Hj-Dr for rsgb_lf_group@blacksheep.org; Fri, 20 Jul 2018 16:05:49 +0100 Received: from omr-a003e.mx.aol.com ([204.29.186.57]) by relay1.thorcom.net with esmtps (TLSv1:DHE-RSA-AES256-SHA:256) (Exim 4.91_59-0488984) (envelope-from ) id 1fgWyY-0008F3-0I for rsgb_lf_group@blacksheep.org; Fri, 20 Jul 2018 16:05:48 +0100 Received: from mtaomg-mae02.mx.aol.com (mtaomg-mae02.mx.aol.com [172.26.254.144]) by omr-a003e.mx.aol.com (Outbound Mail Relay) with ESMTP id B5A083800092 for ; Fri, 20 Jul 2018 11:05:42 -0400 (EDT) Received: from core-mdx05c.mail.aol.com (core-mdx05.mail.aol.com [10.73.15.192]) by mtaomg-mae02.mx.aol.com (OMAG/Core Interface) with ESMTP id A1A8B38000085 for ; Fri, 20 Jul 2018 11:05:37 -0400 (EDT) Received: from 98.111.225.73 by webjas-vac062.srv.aolmail.net (10.96.19.65) with HTTP (WebMailUI); Fri, 20 Jul 2018 11:05:36 -0400 Date: Fri, 20 Jul 2018 11:05:37 -0400 From: wa3tts@verizon.net To: rsgb_lf_group@blacksheep.org Message-Id: <164b8398c37-c8d-b24e@webjas-vac062.srv.aolmail.net> In-Reply-To: <8204aa2f-d5fb-a22f-f7cf-fc98e538fb72@kabelmail.de> References: <8204aa2f-d5fb-a22f-f7cf-fc98e538fb72@kabelmail.de> MIME-Version: 1.0 X-MB-Message-Source: WebUI X-MB-Message-Type: User X-Mailer: JAS STD X-Originating-IP: [98.111.225.73] x-aol-sid: 3039ac1afe905b51fa413665 X-Spam-Score: 0.0 (/) 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: Tom: Many Thanks for the link to Ben H. Tongues writings. I own and have restored both R-98 and R-20 Blonder-Tongue radios circa 1959 and  1960...(Ben H. Tongue of Blonder-Tongue Labs, Inc.) The R-98 design stacks the 10.7Mhz IF transformer in series on top of the 455 kHz  IF transformer.  An interesting approach to a dual band receiver. [...] Content analysis details: (0.0 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [204.29.186.57 listed in list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record 0.0 HTML_MESSAGE BODY: HTML included in message X-Scan-Signature: 79aab7440207271f32757adc503f8c76 Subject: Re: LF: Optimizing Ferrite Rod Antennas - OT? Content-Type: multipart/alternative; boundary="----=_Part_61389_297050426.1532099136566" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.8 required=5.0 tests=HTML_40_50,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 ------=_Part_61389_297050426.1532099136566 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Tom: Many Thanks for the link to Ben H. Tongues writings. I own and have re= stored both R-98 and R-20 Blonder-Tongue radios circa 1959 and=C2=A0 1960..= .(Ben H. Tongue of Blonder-Tongue Labs, Inc.) The R-98 design stacks the 10.7Mhz IF transformer in series on top of the 4= 55 kHz=C2=A0 IF transformer.=C2=A0 An interesting approach to a dual band r= eceiver. The design of the R-98 got me thinking if it was possible to build an optim= ized LF/MF dual band antenna transformer.... I am not sure if it is worth t= he effort, with the extra feed line, etc. The point is that ideas for LF/MF exploration can come from other aspects o= f the radio art... 73, Mike wa3tts -----Original Message----- From: DK1IS To: rsgb_lf_group Sent: Thu, Jul 19, 2018 4:59 pm Subject: LF: Optimizing Ferrite Rod Antennas - OT? Hello group, To whom it may concern: cleaning up my old laptop I happened to find a=20 file from Ben H. Tongue dealing with the optimisation of ferrite rod=20 antennas: http://kearman.com/bentongue/xtalset/29MxQFL/29MxQFL.html Coming originally from the crystal radio people some design aspects in=20 the article could be interesting for our VLF, LF and MF work too - if=20 not already known. 73, Tom, DK1IS ------=_Part_61389_297050426.1532099136566 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable
Tom: Many Thanks for the link to Ben H. = Tongues writings. I own and have restored both R-98 and R-20 Blonder-Tongue= radios circa 1959 and  1960...(Ben H. Tongue of Blonder-Tongue Labs, = Inc.)


The design of the R-98 got me thinking if it was possible to build a= n optimized LF/MF dual band antenna transformer.... I am not sure if it is = worth the effort, with the extra feed line, etc.

The point is that ideas for LF= /MF exploration can come from other aspects of the radio art...


73, Mike wa3tts



-----Original Message-----From: DK1IS <DK1IS@kabelmail.de>
To: rsgb_lf_group <rsgb_lf_g= roup@blacksheep.org>
Sent: Thu, Jul 19, 2018 4:59 pm
Subject: LF: = Optimizing Ferrite Rod Antennas - OT?

Hello group,

To w= hom it may concern: cleaning up my old laptop I happened to find a
file= from Ben H. Tongue dealing with the optimisation of ferrite rod
antenn= as:

http://kearman.com/bentongue/xtalset/29MxQFL/29MxQF= L.html

Coming originally from the crystal radio people some desi= gn aspects in
the article could be interesting for our VLF, LF and MF w= ork too - if
not already known.

73,
Tom, DK1IS


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