Return-Path: Received: (qmail 23964 invoked from network); 1 Apr 2003 12:51:55 -0000 Received: from warrior.services.quay.plus.net (212.159.14.227) by mailstore with SMTP; 1 Apr 2003 12:51:55 -0000 Received: (qmail 5006 invoked from network); 1 Apr 2003 12:51:57 -0000 Received: from post.thorcom.com (193.82.116.70) by warrior.services.quay.plus.net with SMTP; 1 Apr 2003 12:51:57 -0000 X-SQ: A Received: from majordom by post.thorcom.com with local (Exim 4.14) id 190LE7-0006IN-HC for rsgb_lf_group-outgoing@blacksheep.org; Tue, 01 Apr 2003 13:50:55 +0100 Received: from [62.253.164.41] (helo=mta1-svc.business.ntl.com) by post.thorcom.com with esmtp (Exim 4.14) id 190LE1-0006Hn-VE for rsgb_lf_group@blacksheep.org; Tue, 01 Apr 2003 13:50:50 +0100 Received: from l8p8y6 ([62.252.232.211]) by mta1-svc.business.ntl.com (InterMail vM.4.01.03.27 201-229-121-127-20010626) with SMTP id <20030401125048.QUCM6822.mta1-svc.business.ntl.com@l8p8y6> for ; Tue, 1 Apr 2003 13:50:48 +0100 Message-ID: <000e01c2f844$dd62cee0$d3e8fc3e@l8p8y6> From: "hamilton mal" To: rsgb_lf_group@blacksheep.org References: <002b01c2f824$ecb39b60$2602a8c0@WorkGroup> Date: Tue, 1 Apr 2003 12:34:41 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4807.1700 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Subject: LF: Re: Re: RE: GAIN Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Status: No, hits=-13.5 required=5.0tests=ORIGINAL_MESSAGE,QUOTED_EMAIL_TEXT,QUOTE_TWICE_1,REFERENCESversion=2.51 X-Spam-Checker-Version: SpamAssassin 2.51 (1.174.2.5-2003-03-20-exp) X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false ----- Original Message ----- From: "Mike Dennison" To: Sent: Tuesday, April 01, 2003 9:01 AM Subject: LF: Re: RE: GAIN > > Heck Bill even made a loop that was > > 25 feet by 25 feet and it still made it several hundred miles on less than > a > > watt. Series resonate it and run the right ferrite cored transformer. No > > exceptions. > > Mike>WE0H > > I have seen people use 'series' and 'parallel' resonating when talking about > loops, but what is the difference - surely if it is a continuous loop they > are both the same? Can someone clarify, please. I use parallel resonance techniques ie the capicators to resonate the loop are parallel across the loop terminals(feed point). Series resonance has the capacitors in series with one leg of the loop. That is basically the procedure. Matching the resonated loop to 50 ohms coax requires a matching transformer. There are other configurations like feeding the loop into a RF preamp etc. I thought everyone knew the basics of series and parallel resonating loop techniques. Under some circumstances one method is to be preferred over the other but especially for receiving only, as long as the loop is resonated at the frequency of interest either works equally well. I have tried both on my 90 metre loop. I still prefer the vertical approach on LF and not loops for transmitting. G3KEV > > Mike, G3XDV > http://www.lf.thersgb.net > ==================== > > >