Return-Path: Received: from rly-de10.mx.aol.com (rly-de10.mail.aol.com [172.19.170.146]) by air-de04.mail.aol.com (v121_r5.5) with ESMTP id MAILINDE042-50c4963dc8d39e; Tue, 06 Jan 2009 17:35:12 -0500 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by rly-de10.mx.aol.com (v121_r4.4) with ESMTP id MAILRELAYINDE107-50c4963dc8d39e; Tue, 06 Jan 2009 17:34:54 -0500 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1LKKVI-0005Pg-LW for rs_out_1@blacksheep.org; Tue, 06 Jan 2009 22:34:28 +0000 Received: from [83.244.159.144] (helo=relay3.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1LKKVH-0005PX-Vs for rsgb_lf_group@blacksheep.org; Tue, 06 Jan 2009 22:34:28 +0000 Received: from f2phy.netins.net ([167.142.229.65] helo=cgp.netins.net) by relay3.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1LKKVE-0001O5-Oh for rsgb_lf_group@blacksheep.org; Tue, 06 Jan 2009 22:34:27 +0000 X-netINS-MPP: scanned Received: from [167.142.34.9] (account donnatom@netins.net HELO YOUR4DACD0EA75) by cgpf2.cgp.netins.net (CommuniGate Pro SMTP 5.2.10) with ESMTPA id 1866105917 for rsgb_lf_group@blacksheep.org; Tue, 06 Jan 2009 16:34:23 -0600 From: "Dr. Tom Gruis" To: Date: Tue, 6 Jan 2009 16:34:23 -0600 Message-ID: <4C86C347281247589F35AD0102675D4B@YOUR4DACD0EA75> MIME-Version: 1.0 X-Mailer: Microsoft Office Outlook 11 In-Reply-To: <20090106225336.ujvel5oa3i84okkc@webmail4.kuleuven.be> Thread-Index: AclwSVlOE+LjeVsCSi+HVzlhVidAsgABYKnA X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,none Subject: RE: LF: Razor blade RX 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-IP: 193.82.116.20 Ah! Crystal sets! More of the joy of analog.... Doc, -----Original Message----- From: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@blacksheep.org] On Behalf Of Rik Strobbe Sent: Tuesday, January 06, 2009 15:54 To: rsgb_lf_group@blacksheep.org Subject: Re: LF: Razor blade RX Mal, I did build a "crystal radio" with a razor blade as detector when I was 14 years old. It had to be rusty to work properly and even then it was a very poor detector. And it is an AM detector, so not useable for ham signals on 500kHz. 73, Rik ON7YD - OR7T Quoting mal hamilton : > Since I mentioned a Razor blade and fence wire RX a while back I > have had several requests for a circuit. To give others the > opportunity to submit a cct I will await replies. This method was > used successfully at Coldiz and other POW camps to receive BBC > broadcasts. > Let us know how you would approach the subject. This is applicable > to MF/LF since the broadcasts at the time were receicved on these > bands. > Build one and have a QSO using this RX > g3kev > Disclaimer: http://www.kuleuven.be/cwis/email_disclaimer.htm