Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by klubnl.pl (8.14.4/8.14.4/Debian-8+deb8u2) with ESMTP id v9VG5TiE014606 for ; Tue, 31 Oct 2017 17:05:32 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1e9Yvc-0005Rc-4p for rs_out_1@blacksheep.org; Tue, 31 Oct 2017 15:58:12 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1e9Yvb-0005RS-TP for rsgb_lf_group@blacksheep.org; Tue, 31 Oct 2017 15:58:11 +0000 Received: from lb3-smtp-cloud9.xs4all.net ([194.109.24.30]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.89) (envelope-from ) id 1e9YvZ-0008F5-9T for rsgb_lf_group@blacksheep.org; Tue, 31 Oct 2017 15:58:10 +0000 Received: from [192.168.178.20] ([83.162.220.82]) by smtp-cloud9.xs4all.net with ESMTP id 9YvXe1zJ9nIXb9YvYe7VMa; Tue, 31 Oct 2017 16:58:08 +0100 From: "Roelof Bakker" To: rsgb_lf_group@blacksheep.org Date: Tue, 31 Oct 2017 16:58:07 +0100 MIME-Version: 1.0 Message-ID: <59F89D8F.29327.755C30@roelof.ndb.demon.nl> In-reply-to: <006201d3525c$e1c3f0e0$a54bd2a0$@com> References: , <006201d3525c$e1c3f0e0$a54bd2a0$@com> X-mailer: Pegasus Mail for Windows (4.72.572) Content-description: Mail message body X-CMAE-Envelope: MS4wfKZDlC5ADmrswQ9tuw4wSm3VcoVEEja4zSr6MgwJ2h7NOCCWDO/VU1QROvkBpt2VLhTfBQ0b0vYLyTNZbW5VR3TnAIWDMX8wD5a4DvOtltC92h3YXyce W/CU+ejWF9+DzEOMJuVje3bs7jIPLy6nOH7f9uuXqOrEnOvoVX/eKCspn+2qUc22fu5DRItxZig3Rg== X-Spam-Score: 0.0 (/) X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has NOT identified this incoming email as spam. The original message has been attached to this so you can view it or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: Hello Joe, I guess you are plagued with intermod products caused by strong MW broadcast stations. The simplest solution is to use a low pass filter with a cutt off frequency of 520 kHz. This way, I have tamed a number of low cost SDR's. [...] Content analysis details: (0.0 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- X-Scan-Signature: cc2e5baae40f8f7a09b47e6877ef0bfb Subject: LF: Re: [rsgb_lf_group] - Funcube on 630M Content-type: text/plain; charset=US-ASCII Content-transfer-encoding: 7BIT X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.0 required=5.0 tests=none 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 Hello Joe, I guess you are plagued with intermod products caused by strong MW broadcast stations. The simplest solution is to use a low pass filter with a cutt off frequency of 520 kHz. This way, I have tamed a number of low cost SDR's. At the moment I have a cheap 20 Euro RTL-SDR V3 dongle in direct sampling mode, which performs remarkably well. It needs a tuneable pre-amplifier followed by a 530 kHz low pass filter. 73, Roelof Bakker, pa0rdt