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Thread-Index: AQHUOtI5gzvhLvNKJEOPg5JSBjRyoqTNEz0AgAAO2gCAAAMGgIAABP6AgAAMM4CAACtB/A== Date: Thu, 23 Aug 2018 14:17:22 +0000 Message-ID: <1535033840158.66707@kuleuven.be> References: <1613303827.20180823120801@gmail.com> <5B7E9BB0.7000307@posteo.de> <5B7EA826.5000906@posteo.de> <193866059.20180823133807@gmail.com> <5B7EAEDF.9090000@posteo.de>,<1522856505.20180823143939@gmail.com> In-Reply-To: <1522856505.20180823143939@gmail.com> Accept-Language: nl-BE, en-GB, en-US Content-Language: nl-BE X-MS-Has-Attach: X-MS-TNEF-Correlator: x-ms-exchange-transport-fromentityheader: Hosted x-originating-ip: [10.112.50.1] MIME-Version: 1.0 X-Spam-Score: -2.3 (--) 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 @@CONTACT_ADDRESS@@ for details. Content preview: Hi Chris, maybe you are better off with a 198kHz notch filter? 73, Rik ON7YD - OR7T [...] Content analysis details: (-2.3 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -2.3 RCVD_IN_DNSWL_MED RBL: Sender listed at http://www.dnswl.org/, medium trust [2a02:2c40:0:c0:0:0:25:129 listed in] [list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record -0.0 T_RP_MATCHES_RCVD Envelope sender domain matches handover relay domain X-Scan-Signature: ac0f6ff1af52b6036ac1f4fe0c2bd52c Subject: Re: LF: Anyone good with Elsie? Content-Type: text/plain; charset="iso-8859-1" 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=TO_ADDRESS_EQ_REAL 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 Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by klubnl.pl id w7NENO6H011914 Hi Chris, maybe you are better off with a 198kHz notch filter? 73, Rik ON7YD - OR7T ________________________________________ Van: owner-rsgb_lf_group@blacksheep.org namens Chris Wilson Verzonden: donderdag 23 augustus 2018 15:39 Aan: DK7FC Onderwerp: Re: LF: Anyone good with Elsie? Hello DK7FC Stefan, I am seeing better SNR and more WSPR receptions in general with the BPF in place, especially at night when the huge BBC broadcast signal on 198kHz that's not THAT far from me becomes intrusive. During the day there's not a lot of noticeable difference with and without the BPF but at night I would need a lot of attenuation to stop 198kHz swamping the receiver. Thursday, August 23, 2018, 1:55:59 PM, you wrote: > Hi Chris, > Am 23.08.2018 14:38, schrieb Chris Wilson: >> My method of testing >> is a wide band commercial noise source and two series wide band amps >> to up the level to something useable by my SDR, then look at the BPF >> filter action on the display in HDSDR. I have a spectrum analyser but >> am not very good with it, given the comfort I have using HDSDR I am >> probably better keeping it simple! Sound OK? > Yes, sure. You see what you need to see. The perfect tool. I also use > SpecLab to check filter curves... > For what do you need the BPF? Just for fun or do you have serious > problems with DCF39 and HGA22? In the last case you may need to put some > effort in the Q of the coils to get a sharper slope. Hand wound coils on > pot cores, using RF litz wire seems to be best. I reached a Q of > 500 > if i remember correctly. > But somehow my results have never been really satisfying... > 73, Stefan -- Best regards, Chris mailto:dead.fets@gmail.com