Return-Path: X-Spam-DCC: paranoid 1233; Body=2 Fuz1=2 Fuz2=2 X-Spam-Checker-Version: SpamAssassin 3.1.3 (2006-06-01) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=-0.7 required=5.0 tests=BAYES_00,DNS_FROM_AHBL_RHSBL, RATWARE_GECKO_BUILD autolearn=no version=3.1.3 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by paranoid.lipkowski.org (8.13.7/8.13.7) with ESMTP id t1GMUhEN006981 for ; Mon, 16 Feb 2015 23:30:44 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1YNU9K-0005yk-1k for rs_out_1@blacksheep.org; Mon, 16 Feb 2015 22:28:18 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1YNU9J-0005yb-MG for rsgb_lf_group@blacksheep.org; Mon, 16 Feb 2015 22:28:17 +0000 Received: from mout.gmx.net ([212.227.17.22]) by relay1.thorcom.net with esmtp (Exim 4.85) (envelope-from ) id 1YNU9I-0002VS-0p for rsgb_lf_group@blacksheep.org; Mon, 16 Feb 2015 22:28:16 +0000 Received: from [127.0.0.1] ([91.38.30.93]) by mail.gmx.com (mrgmx103) with ESMTPSA (Nemesis) id 0LaXmV-1XibLN2rSZ-00mH1n for ; Mon, 16 Feb 2015 23:28:14 +0100 Message-ID: <54E26EF4.20100@gmx.net> Date: Mon, 16 Feb 2015 23:28:04 +0100 From: Tobias DG3LV User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:31.0) Gecko/20100101 Thunderbird/31.4.0 MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <97CF0B1C-93C3-4667-8AFB-EF3B559FF9AE@iz7pdx.it> <799A8358-390F-4A95-8B4F-ACF90396344E@iz7pdx.it> In-Reply-To: X-Provags-ID: V03:K0:EUP2QjlrPThCH02IFPoj6v8An0joRzE049NwHEXdi7wqx3sus14 Ll9QszGvYIfXCMUMSTvA5APQs4zbHNEg+9sYTtWWJP2ocMxhPoz+N7eygDjGXL/ABnix05U WPZSzxLrUkGLXGufflf4E6B8EVM47v3V46JFrbubPERvXf58INQSMLrzAZ/sdNXecRISfp8 az/aBuQLgLAjxj5D3wegA== X-UI-Out-Filterresults: notjunk:1; X-Scan-Signature: c9c533f07c530c146486ecf89a00ebb1 Subject: Re: LF: Qrss3 beacon test Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit 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-Scanned-By: MIMEDefang 2.56 on 10.1.3.10 Status: O X-Status: X-Keywords: X-UID: 2380 Hi Mauro ! The FZ_02 mechanical filter can be easily inserted into a 50 Ohm receiving(!) system by the use of two 1:9 transformers (at Input and Output of the FZ-02) to match the 500 Ohm Input/Output impedances of the filter at the yellow wires! Use capacitors of the exact capacity [in pF] as printed at both ends of the filter for compensation. (I soldered the capacitors to the unused 18k-Ohm wires = red). You will get a flat top of the attenuation curve and steep edges. measured Attenuations at : 461.2 kHz -64.91dB 467.1 kHz -3.10dB 473.0 kHz -2.70dB 479.1 kHz -3.48dB 485.3 kHz -63.62dB used 1:9 Transformer : FT50-43 toroid, 10 turns of (flat) trifilar enamelled wire (AWG #26). This filter is a good cure to all sorts of intermodulation and noise caused by out-of-band signals. 73 de dg3lv Tobias Am 16.02.2015 um 22:08 schrieb IK1WVQ Mauro: > hi Luigi, > this is the schematic of my stupid receiver.. > today I bought from Ebay a mechanical filter FZ_02 to clean a bit the > spectrum. > > coming soon: a 20W TX (mosfet IRF510) for tests with "earth_electrode > antenna" (impossible for me to build a Marconi) > > 73 de Mauro IK1WVQ > > > >> Very interesting... Do you have mord info Mauro? >> >> Inviato da iPhone >> >> > Il giorno 15/feb/2015, alle ore 22:28, IK1WVQ Mauro >> ha scritto: >> > >> > Hi Luigi, >> > your signal is ok here in JN44CB. >> > >> > my antenna is PA0RDT >> > RX is a simple NE602 mixer with a MF 455kHz(yallow core) front end .. >> > no RF preamplifier, no audio postamplifier . directly to the MIC >> input of PC !! >> > >> > 73 de Mauro IK1WVQ >> > >> > >> > >> > >> > >> > At 13:40 15/02/2015, IZ7PDX Luigi D. wrote: >> >> Gm Mf ... >> >> I have the pleasure to introduce my new QRSS3 test beacon at >> 476.150 Khz in JN80PS. >> >> 25 mt new Marconi antenna , 50 W. >> >> Daily and night reports are welcome ! >> >> Thanks in advance. >> >> Vy 73 de Luigi IZ7PDX >> >> >> >> Inviato da iPhone >> >