Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-md04.r1000.mx.aol.com (Internet Inbound) with ESMTP id 0BB38380000CA; Fri, 19 Aug 2011 11:21:36 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1QuQrp-0000CG-51 for rs_out_1@blacksheep.org; Fri, 19 Aug 2011 16:20:17 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1QuQro-0000C6-IF for rsgb_lf_group@blacksheep.org; Fri, 19 Aug 2011 16:20:16 +0100 Received: from out1.ip03ir2.opaltelecom.net ([62.24.128.239]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1QuQrm-000599-5p for rsgb_lf_group@blacksheep.org; Fri, 19 Aug 2011 16:20:16 +0100 X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: AgAFALl+Tk5cHnZO/2dsb2JhbABClCQDk2V4gTsUAQEDSQIsAggCAQcBHDkBBBoGJB0BAgIBAYdimF+gGYZIBIcxnFg X-IronPort-AV: E=Sophos;i="4.68,251,1312153200"; d="scan'208,217";a="357339934" Received: from host-92-30-118-78.as13285.net (HELO xphd97xgq27nyf) ([92.30.118.78]) by out1.ip03ir2.opaltelecom.net with SMTP; 19 Aug 2011 16:20:08 +0100 Message-ID: <001501cc5e83$6f32d1f0$0401a8c0@xphd97xgq27nyf> From: "mal hamilton" To: "rsgb" Date: Fri, 19 Aug 2011 16:19:47 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2600.0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2600.0000 X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001 Subject: LF: fERRITE JOY STICK Content-Type: multipart/alternative; boundary="----=_NextPart_000_0012_01CC5E8B.D090AFF0" 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_30_40,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 x-aol-global-disposition: G X-AOL-SCOLL-SCORE: 0:2:380193216:93952408 X-AOL-SCOLL-URL_COUNT: 0 x-aol-sid: 3039ac1d60584e4e7f807975 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none This is a multi-part message in MIME format. ------=_NextPart_000_0012_01CC5E8B.D090AFF0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable LF I happen to have a bunch of 9 ferrite rods 100mm long and wound with = 1mm enamel copper wire gives me 893 uH, a parallel C of 5 nF gives me 126 Khz so now it requires a C of the right value to get to 137 = Khz.=20 I have coupled this ferrite joy stick via a 3 turn loop in the middle of = the main winding to a Siemens D2155/W3155 for testing and it works but = the signals are vy weak. It definitely needs a good pre amp to be = useful. This is just a fun experiment for me because I do not need any more = antennas at this qth=20 de mal/g3kev =20 ------=_NextPart_000_0012_01CC5E8B.D090AFF0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

I happen to have a bunch of 9 ferrite rods = 100mm=20 long and wound with 1mm enamel copper wire gives me 893 uH, a parallel C = of 5=20 nF

gives me 126 Khz so now it requires a = C of the=20 right value to get to 137 Khz.

I have coupled this ferrite joy stick via a = 3 turn=20 loop in the middle of the main winding to a Siemens D2155/W3155 = for=20 testing and it works but the signals are vy weak. It definitely needs a = good pre=20 amp to be useful.

This is just a fun experiment for me = because I do not=20 need any more antennas at this qth

de mal/g3kev

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