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[195.171.43.25]) by mx.google.com with ESMTP id iz6si29465616lbc.46.2014.06.29.07.27.05 for ; Sun, 29 Jun 2014 07:27:06 -0700 (PDT) Received-SPF: none (google.com: owner-rsgb_lf_group@blacksheep.org does not designate permitted sender hosts) client-ip=195.171.43.25; Authentication-Results: mx.google.com; spf=neutral (google.com: owner-rsgb_lf_group@blacksheep.org does not designate permitted sender hosts) smtp.mail=owner-rsgb_lf_group@blacksheep.org Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1X1Exe-0002di-NV for rs_out_1@blacksheep.org; Sun, 29 Jun 2014 14:16:02 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1X1Exe-0002dZ-9y for rsgb_lf_group@blacksheep.org; Sun, 29 Jun 2014 14:16:02 +0100 Received: from smtpout3.wanadoo.co.uk ([80.12.242.59] helo=smtpout.wanadoo.co.uk) by relay1.thorcom.net with esmtp (Exim 4.82) (envelope-from ) id 1X1Exb-00063e-Qv for rsgb_lf_group@blacksheep.org; Sun, 29 Jun 2014 14:16:01 +0100 Received: from AGB ([2.31.69.97]) by mwinf5d42 with ME id LDFy1o00425vB4a03DFyGZ; Sun, 29 Jun 2014 15:15:59 +0200 X-ME-Helo: AGB X-ME-Date: Sun, 29 Jun 2014 15:15:59 +0200 X-ME-IP: 2.31.69.97 Message-ID: <5BDC3FE7A4DD4F83A88F734090542F80@AGB> From: "Graham" To: References: <1404042628.82940.YahooMailBasic@web173006.mail.ir2.yahoo.com> In-Reply-To: <1404042628.82940.YahooMailBasic@web173006.mail.ir2.yahoo.com> Date: Sun, 29 Jun 2014 14:15:58 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal Importance: Normal X-Mailer: Microsoft Windows Live Mail 14.0.8117.416 X-MimeOLE: Produced By Microsoft MimeOLE V14.0.8117.416 X-Spam-Score: 0.2 (/) X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has identified this incoming email as possible spam. The original message has been attached to this so you can view it (if it isn't spam) or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: Hi Pete I googled rtl direct conversion , there are a few close up' , part of web sites , the eastern eu sites seem to be the best ones There are qty x 2 caps in the input lines 1.5 mm size , these make handy solder terminals , the images show which one to use for direct ... as to leaving the cap in place , not sure , if the vhf side is dead , tempting to remove it , but ensure your input is decoupled .. [...] Content analysis details: (0.2 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [80.12.242.59 listed in list.dnswl.org] 0.2 STOX_REPLY_TYPE STOX_REPLY_TYPE X-Scan-Signature: 94ef9bffc6f89f1cfd7136f29ab9f080 Subject: Re: Re: LF: Fw: : Re: [rsgb_lf_group] Re:: 100KHz-1.7GHz full band UV HF RTL-SDR USB Tuner Receiver: How to get HF to work? Content-Type: text/plain; format=flowed; charset="UTF-8"; reply-type=original Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.1 required=5.0 tests=MISSING_OUTLOOK_NAME 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 Hi Pete I googled rtl direct conversion , there are a few close up' , part of web sites , the eastern eu sites seem to be the best ones There are qty x 2 caps in the input lines 1.5 mm size , these make handy solder terminals , the images show which one to use for direct ... as to leaving the cap in place , not sure , if the vhf side is dead , tempting to remove it , but ensure your input is decoupled .. After running on 7mhz , I found I had frazzled the vhf input of my dongle , which ran 24 MHz > 1.? Ghz ..however , the A/D is still working and placing the MK1 digit on one of the caps produces HF radio signals .. these $10 wonders have 2 lives :) Where is Jim these days ? , what we need is one of his pre amps with a tailored response and 200 ohms output Z , 10 dB of gain 3 or 4 s points should be enough ? 73-G, -------------------------------------------------- From: "M0FMT" Sent: Sunday, June 29, 2014 12:50 PM To: Subject: Fw: Re: LF: Fw: : Re: [rsgb_lf_group] Re:: 100KHz-1.7GHz full band UV HF RTL-SDR USB Tuner Receiver: How to get HF to work? > Hi Graham > > As you may remember I use an up converter for HF. I would like to try the > direct conversion method can you advise where I make the connection. Have > you done a close up jpg of the chip?? > > Mal as a matter of interest were you keying up a coup[le of time this > morning on about 472.5 at around 10:20 UK time.? I was listening to G3DXZ > who did a break ditdit dahdah ditdit's when we heard a couple of short > dashes...... which is unusual considering the activity on the band....... > no "pack drill" just an open question?. > > 73 es GL Pete M0FMT IO91UX > > > --- On Sun, 29/6/14, Graham wrote: > >> From: Graham >> Subject: Re: LF: Fw: : Re: [rsgb_lf_group] Re:: 100KHz-1.7GHz full band >> UV HF RTL-SDR USB Tuner Receiver: How to get HF to work? >> To: rsgb_lf_group@blacksheep.org >> Date: Sunday, 29 June, 2014, 12:23 >> >> >> >> >> >> Thanks Mal, >> >> Tom , wired them direct last night >> .... interesting >> angle , seems they have dropped half >> of a >> normal dongle into a docking >> board , The >> issue I was interested in was the Ae >> feed >> for low bands , and from the image , >> its visible , >> that the feed is single ended , via the >> toroid ., he >> also plotted the gain , which falls >> off to >> LF , which is similar to the device >> being >> Cap coupled , both are single ended >> methods ... >> 100KHz is listed as the lower >> operating >> frequency , in this case its possible >> the transformer >> is the reason ...... >> >> I think a small pre-amp [ 10 dB >> ?] with >> gain roll off to HF would be a >> better >> option , as the chip works in >> a direct >> coupled set up , down to audio , a pre >> amp could >> also provide the ~~ 200 >> ohms input match as well >> >> >> But for round £10/15 supplied >> as-seen not >> a bad option >> >> 73-G, >> >> >> >> >> From: mal hamilton >> >> Sent: Sunday, June 29, 2014 8:31 AM >> To: rsgb >> >> Subject: LF: Fw: : Re: [rsgb_lf_group] Re:: >> 100KHz-1.7GHz full band >> UV HF RTL-SDR USB Tuner Receiver: How to get HF to >> work? >> >> >> >> ----- Original Message ----- >> From: DK1IS DK1IS@kabelmail.de >> [rsgb_lf_group] >> To: rsgb_lf_group@yahoogroups.co.uk >> >> >> Sent: Saturday, June 28, 2014 12:09 PM >> Subject: Re: : Re: [rsgb_lf_group] Re:: >> 100KHz-1.7GHz full band UV >> HF RTL-SDR USB Tuner Receiver: How to get HF to >> work? >> >> >> >> >> >> >> >> Hello Graham, >> >> Please see >> below! >> >> 73, >> Tom,DK1IS >> >> Am 27.06.2014 22:52, schrieb g0nbd@hotmail.com >> [rsgb_lf_group]: >> >> >> >> Tom, >> >> >> At least its running ! >> Yes it >> is and not so bad! >> >> >> >> >> >> >> >> >> '' only the >> q-input >> works''This >> only means >> that if you click the ExtIO button at the HDSR user >> interface "RTL Setting" >> offers to you at Direct Sampling "Disabled" (for >> VHF/UHF), "I input" (no >> stations at HF, only noise) and "Q Input" >> (stations at HF). >> >> >> >> >> >> >> >> >> >> Do I >> assume, >> that they are using a single >> ended feed >> for the low band >> ?Having no >> datasheet for the >> RTL2832U I´m not sure about this. As you can see on the >> picture enclosed at the >> lower side of the pcb there is a small ferrite toroid for >> the HF signal with two >> output wires, first being fixed with silicone on the >> RTL2832U housing and then >> going to two adjacent pins of the IC - whatever this means. >> >> >> >> >> >> >> >> >> Is there >> some form of pre-amp / pass >> band >> filter before the input >> ?There >> is no pre-amp but you >> can see a two stage low pass filter on th left side of the >> ferrite toroid (two >> coils and 6 capacitors) >> >> >> >> >> >> >> >> >> 73-G, >> >> >> >> __._,_.___ >> >> >> >> Posted by: DK1IS >> >> >> >> >> >> >> Reply >> >> via web post >> • >> Reply >> >> to sender >> • >> Reply >> >> to group >> • >> Start >> >> a new topic >> • >> Messages >> >> in this topic (5) >> Visit >> >> Your Group >> >> New >> >> Members 2 >> >> >> • Privacy >> • >> Unsubscribe >> >> • Terms >> of >> Use >> >> >> >> . >> >> __,_._,___ >> #yiv856004783 #yiv856004783ygrp-mkp { >> 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