Return-Path: Received: (qmail 11748 invoked from network); 13 Mar 2002 05:30:07 -0000 Content-Transfer-Encoding: 8bit Received: from unknown (HELO warrior.services.quay.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 13 Mar 2002 05:30:07 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: (qmail 1717 invoked from network); 13 Mar 2002 05:30:07 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior.services.quay.plus.net with SMTP; 13 Mar 2002 05:30:07 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from majordom by post.thorcom.com with local (Exim 3.33 #2) id 16l2od-00081T-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 13 Mar 2002 07:04:51 +0000 Received: from mail4.messagelabs.com ([212.125.75.12]) by post.thorcom.com with smtp (Exim 3.33 #2) id 16l2oc-00081O-00 for rsgb_lf_group@blacksheep.org; Wed, 13 Mar 2002 07:04:50 +0000 X-VirusChecked: Checked Received: (qmail 23093 invoked from network); 13 Mar 2002 05:26:47 -0000 Received: from merimac.us.gases.boc.com (HELO merimac) (204.149.80.4) by server-14.tower-4.messagelabs.com with SMTP; 13 Mar 2002 05:26:47 -0000 Received: by EXC_WIL04 with Internet Mail Service (5.5.2653.19) id ; Wed, 13 Mar 2002 00:34:39 -0500 Message-ID: From: "Ashlock,William" To: rsgb_lf_group@blacksheep.org Subject: LF: RE: loop/update Date: Wed, 13 Mar 2002 00:18:24 -0500 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2653.19) Content-Type: text/plain; charset=iso-8859-1; format=flowed Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Mal, >Inductance measured = 173 uH >DC resistance of loop wire plus coax feed 1.5 ohms. Your DC resistance is WAY to high! Should be a fraction of an ohm. This is because you have the coax in the circuit. The coupling transformer must be located at the base of the loop. >Loop resonated on 136 khz, parallel configuration 1502 pf needed. Way too low. Your coax capacity is a good part of this. Use series resonance at the transformer secondary, not in the shack. The capacitor should be in the neighborhood of 0.01uf. >Gain measured at receiver without antenna and antenna connected = 30 db >approx. Gain difference measured on 136 khz between nonresonated loop and >resonated indicates 10 db advantage by resonating. Should be much higher. Common shape up! Bill A ********************************************************************* This footnote confirms that this e-mail message has been scanned for the presence of known computer viruses by the MessageLabs Virus Control Centre. However, it is still recommended that you use local virus scanning software to monitor for the presence of viruses. *********************************************************************