Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-mk03.r1000.mx.aol.com (Internet Inbound) with ESMTP id 3DBE8380000BF; Tue, 13 Sep 2011 08:14:37 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1R3Rqr-0007so-W9 for rs_out_1@blacksheep.org; Tue, 13 Sep 2011 13:12:33 +0100 Received: from [83.244.159.144] (helo=relay3.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1R3Rqk-0007im-9M for rsgb_lf_group@blacksheep.org; Tue, 13 Sep 2011 13:12:26 +0100 Received: from mtaout03-winn.ispmail.ntl.com ([81.103.221.49]) by relay3.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1R3Rqf-0003hc-IG for rsgb_lf_group@blacksheep.org; Tue, 13 Sep 2011 13:12:21 +0100 Received: from aamtaout02-winn.ispmail.ntl.com ([81.103.221.35]) by mtaout03-winn.ispmail.ntl.com (InterMail vM.7.08.04.00 201-2186-134-20080326) with ESMTP id <20110913121215.IEQD17535.mtaout03-winn.ispmail.ntl.com@aamtaout02-winn.ispmail.ntl.com>; Tue, 13 Sep 2011 13:12:15 +0100 Received: from [192.168.2.2] (really [82.5.252.56]) by aamtaout02-winn.ispmail.ntl.com (InterMail vG.3.00.04.00 201-2196-133-20080908) with ESMTP id <20110913121215.QFWJ5924.aamtaout02-winn.ispmail.ntl.com@[192.168.2.2]>; Tue, 13 Sep 2011 13:12:15 +0100 From: "Mike Dennison" To: rsgb_lf_group@blacksheep.org Date: Tue, 13 Sep 2011 13:12:06 +0100 MIME-Version: 1.0 CC: Roger Lapthorn Message-ID: <4E6F56A6.13208.606C82@mike.dennison.ntlworld.com> X-mailer: Pegasus Mail for Windows (4.41) Content-description: Mail message body X-Cloudmark-Analysis: v=1.1 cv=JvdXmxIgLJv2/GthKqHpGJEEHukvLcvELVXUanXFreg= c=1 sm=0 a=uObrxnre4hsA:10 a=9YlaCzn6_68A:10 a=kj9zAlcOel0A:10 a=cHDammdcOL4wb6sUz6cA:9 a=CjuIK1q_8ugA:10 a=HpAAvcLHHh0Zw7uRqdWCyQ==:117 X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,none Subject: LF: Ferrite ant - correction Content-type: text/plain; charset=US-ASCII Content-transfer-encoding: 7BIT 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=none 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: 0:2:357082464:93952408 X-AOL-SCOLL-URL_COUNT: 0 x-aol-sid: 3039ac1d61874e6f492c6623 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none In my recent message re my use of a ferrite rod antenna to receive at 73kHz, the description of the amplifier is rubbish! What I should have said was that the tuned ferrite rod formed the gate input of the 2N3819 FET, the drain was earthed for RF and the output was taken from the source. This gave very high Q and a reasonable match to the radio's input. Mike ====