Return-Path: Received: from rly-dd05.mx.aol.com (rly-dd05.mail.aol.com [172.19.141.152]) by air-dd07.mail.aol.com (v121_r4.4) with ESMTP id MAILINDD072-b794936eb1b270; Wed, 03 Dec 2008 15:26:18 -0500 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by rly-dd05.mx.aol.com (v121_r4.4) with ESMTP id MAILRELAYINDD053-b794936eb1b270; Wed, 03 Dec 2008 15:25:42 -0500 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1L7xxE-0007xY-0X for rs_out_1@blacksheep.org; Wed, 03 Dec 2008 20:04:12 +0000 Received: from [83.244.159.144] (helo=relay3.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1L7xwe-0007xP-4T for rsgb_lf_group@blacksheep.org; Wed, 03 Dec 2008 20:03:47 +0000 Received: from smtp-out-4.talktalk.net ([62.24.128.234] helo=smtp.talktalk.net) by relay3.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1L7xwV-0006Lt-Ay for rsgb_lf_group@blacksheep.org; Wed, 03 Dec 2008 20:03:29 +0000 X-Path: TTSMTP X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: AswEAAZ1NklOlpf5/2dsb2JhbACCQS+BXYY9yCuCfw Received: from unknown (HELO mal769a60aa920) ([78.150.151.249]) by smtp.talktalk.net with SMTP; 03 Dec 2008 20:03:17 +0000 Message-ID: <00b001c95582$2f52e140$0301a8c0@mal769a60aa920> From: "mal hamilton" To: References: <004301c9549b$d0f65b40$0301a8c0@mal769a60aa920> <001601c954a2$867a58d0$6401a8c0@asus> <49357311.2090801@yahoo.com> <004301c95530$804a8b90$0301a8c0@mal769a60aa920> <4936BA2F.10309@yahoo.com> Date: Wed, 3 Dec 2008 20:03:17 -0000 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2180 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001 Subject: Re: LF: DEGEN 1103...Simple RX Loop info Content-Type: multipart/alternative; boundary="----=_NextPart_000_00AD_01C95582.2EFCF910" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.5 required=5.0 tests=HTML_20_30,HTML_MESSAGE 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 ------=_NextPart_000_00AD_01C95582.2EFCF910 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Mike I have a LM747 that might do the trick, use one half. 73 mal/g3kev ----- Original Message -----=20 From: Mike-WE0H=20 To: rsgb_lf_group@blacksheep.org=20 Sent: Wednesday, December 03, 2008 4:56 PM Subject: Re: LF: DEGEN 1103...Simple RX Loop info Hi Mal, Use a LM741 Op-Amp in place of the OP27. That IC works perfect with a litt= le less gain. You might already have one in stock too. There is a board layo= ut and other info for building this loop here: http://www.we0h.us/505kc/Simple-RX-Loop-Antenna/ That would save you time on a board layout if you wanted to etch a preamp=20= board. The .pcb file is a ExpressPCB file of the board if you run ExpressPCB= software. http://www.we0h.us/505kc/Simple-RX-Loop-Antenna/Simple-RX-Loop-board-layou= t.jpg is the board in a jpg file which you can print directly. Might take some s= caling but you know the IC pin spacing to scale the board to. Easy. I use th= e iron on laser printed image then muriatic acid & peroxide etching mix to d= o the job. Quick & simple. A neat thing about this RX loop and others is you= can sit the portable receiver next to the loop with no physical connection=20= to the radio's loopstick antenna and get all the benefit of the RX loop with= no feedline!!! I have done it many times. I built 2 of these loops as they=20= work that well. http://www.we0h.us/505kc/RX-Loop/Portable-RX-Loop-small.jpg This is my portable version sitting in my backyard (garden) with variable=20= tuning covering 200-650kc. Mike WE0H Mal wrote:=20 Hello Mike That is a nice loop and preamp. Where can I get an OP-27 chip from. de mal/g3kev ----------------------------------------------------------------------------= -- No virus found in this incoming message. Checked by AVG - http://www.avg.com=20 Version: 8.0.176 / Virus Database: 270.9.13/1825 - Release Date: 12/2/2008= 8:44 PM ------=_NextPart_000_00AD_01C95582.2EFCF910 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Mike
I have a LM747 that might do the trick, use= one=20 half.
73 mal/g3kev
 
----- Original Message -----
Mike-WE0H
Sent: Wednesday, December 03, 2008=20= 4:56=20 PM
Subject: Re: LF: DEGEN 1103...Simpl= e RX=20 Loop info

Hi Mal,

Use a LM741 Op-Amp in place of the OP27. Tha= t IC=20 works perfect with a little less gain. You might already have one in stock= =20 too. There is a board layout and other info for building this loop here:http://www.we0h.us/505kc/Simple-RX-Loop-Antenna/
That=20 would save you time on a board layout if you wanted to etch a preamp board= .=20 The .pcb file is a ExpressPCB file of the board if you run ExpressPCB=20 software.
http://www.= we0h.us/505kc/Simple-RX-Loop-Antenna/Simple-RX-Loop-board-layout.jpg
= is=20 the board in a jpg file which you can print directly. Might take some scal= ing=20 but you know the IC pin spacing to scale the board to. Easy. I use the iro= n on=20 laser printed image then muriatic acid & peroxide etching mix to do th= e=20 job. Quick & simple. A neat thing about this RX loop and others is you= can=20 sit the portable receiver next to the loop with no physical connection to=20= the=20 radio's loopstick antenna and get all the benefit of the RX loop with no=20 feedline!!! I have done it many times. I built 2 of these loops as they wo= rk=20 that well.
http://www.we0h.us/505kc/RX-Lo= op/Portable-RX-Loop-small.jpg
This=20 is my portable version sitting in my backyard (garden) with variable tunin= g=20 covering 200-650kc.

Mike
WE0H


Mal wrote:=20
Hello Mike
That is a nice loop and preamp. Where c= an I get=20 an  OP-27 chip from.
de mal/g3kev


No virus found in this incoming message.
Checked by AVG -=20 http://www.avg.com
Version: 8.0.176 / Virus Database: 270.9.13/1825 -=20 Release Date: 12/2/2008 8:44 PM
------=_NextPart_000_00AD_01C95582.2EFCF910--