Return-Path: Received: (qmail 3717 invoked from network); 8 Jul 2001 09:46:02 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 8 Jul 2001 09:46:02 -0000 Received: (qmail 15999 invoked from network); 8 Jul 2001 09:44:59 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 8 Jul 2001 09:44:59 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15JAz3-0007NT-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 08 Jul 2001 10:36:09 +0100 Received: from fep01.swip.net ([130.244.199.129] helo=fep01-svc.swip.net) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15JAz1-0007NO-00 for rsgb_lf_group@blacksheep.org; Sun, 08 Jul 2001 10:36:08 +0100 Received: from W98 ([212.151.45.0]) by fep01-svc.swip.net with SMTP id <20010708093639.PKXC21692.fep01-svc.swip.net@W98> for ; Sun, 8 Jul 2001 11:36:39 +0200 Message-ID: <002701c10791$4b1982e0$002d97d4@W98.swipnet.se> From: "C Andersson" To: "RSGB LF Group" Subject: LF: SM1LCA now on LF Date: Sun, 8 Jul 2001 11:34:47 +0200 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 4.72.3110.5 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: SM1LCA Kjell is now QRV on 136.8 kHz with 100W TX PWR. We had a QSO this morning which was a bit of a struggle due to heavy QRN. This was also the first test of my rotary loop for RX. It is octagonal with 2,8 m "diameter". Two turns connected directly to a 1:1 balun, 85 m RG58 and then a simple JFET preamp. It is resonant at 140 kHz and can simply be lowered in frequency by parallelling C's at the RX end. DCF39 can be brought down from S9+35 to S7. I don't know how deep "nulls" one can expect (in practice) from such a design. The loop is placed in an old shed some 60 m from the shack, away from all electrical lines. 73 Christer sm6pxj