Return-Path: Received: (qmail 990 invoked from network); 26 Jan 2001 00:57:22 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 26 Jan 2001 00:57:22 -0000 Received: (qmail 20364 invoked from network); 26 Jan 2001 00:51:37 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 26 Jan 2001 00:51:37 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14Lx0e-0000FA-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 26 Jan 2001 00:45:00 +0000 Received: from latimer.mail.uk.easynet.net ([195.40.1.40]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14Lx0d-0000F5-00 for rsgb_lf_group@blacksheep.org; Fri, 26 Jan 2001 00:44:59 +0000 Received: from ericadodd (tnt-18-24.easynet.co.uk [212.134.224.24]) by latimer.mail.uk.easynet.net (Postfix) with SMTP id 285DA5407F for ; Fri, 26 Jan 2001 00:44:45 +0000 (GMT) Message-ID: <002101c08731$7787a720$18e086d4@ericadodd> From: "g3ldo" To: rsgb_lf_group@blacksheep.org References: <200101251619_MC2-C323-E007@compuserve.com> Subject: LF: Re: vector potential - the last word? Date: Fri, 26 Jan 2001 00:45:07 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4522.1200 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Nice one Roger! > Readers who retain old copies of the journal RadCom will have seen two >historic photographs of a distinguished experimental physicist which >appeared in the April 1944 and May 1944 issues of the journal. The >distinguished hand was holding a flourescent tube in the presence of a high >electrical potential which illuminated the tube. Although it was 1984 - I was only 12 years old in 1944 I had actually conceded the point when you quoted Richard Feynman but had not got round to formulating a reply. I might just be able to hang in there with Electomagnetic Theory but when it comes to Quantum Mechanics I am lost. Some time ago I bought Feynman's "Six Easy Pieces" and "Six not-so-easy Pieces" from his famous lectures. However, these books do not extend as far a Quantum Mechanics and treats Electromagnetic Theory in the traditional way. You might let me know which book or paper your Feynman quotation came from. For those of you who are may be wondering what all this is about. Roger submitted an article on a toroidal antenna to the RSGB Radcom in 1994 when I was Technical Editor. The small torodial antenna was so radical I decided to build one before publishingRegards, Initally I had no success with his original single toroid model but with more advice from Roger I got a double toroid antenna working. With a 14MHz model, 300mm in diameter and around 400mm tall I worked VK on more than one occasion. The photo Roger refers to is a radiation test being performed on this antenna. This begs the question of whether one of these antennas would work on 136kHz. The answer is probably yes - the down side is that it is rather a complex structure and would be difficult to engineer. Peter, G3LDO .